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NO138199B - DRUM MACHINE OF THE DRUM TYPE. - Google Patents

DRUM MACHINE OF THE DRUM TYPE. Download PDF

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Publication number
NO138199B
NO138199B NO3736/73A NO373673A NO138199B NO 138199 B NO138199 B NO 138199B NO 3736/73 A NO3736/73 A NO 3736/73A NO 373673 A NO373673 A NO 373673A NO 138199 B NO138199 B NO 138199B
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pyrazolines
acid
acidic
drum
general formula
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NO3736/73A
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Norwegian (no)
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NO138199C (en
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Douglas L G Young
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Ingersoll Rand Canada
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B27WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27LREMOVING BARK OR VESTIGES OF BRANCHES; SPLITTING WOOD; MANUFACTURE OF VENEER, WOODEN STICKS, WOOD SHAVINGS, WOOD FIBRES OR WOOD POWDER
    • B27L1/00Debarking or removing vestiges of branches from trees or logs; Machines therefor
    • B27L1/02Debarking or removing vestiges of branches from trees or logs; Machines therefor by rubbing the trunks against each other; Equipment for wet practice
    • B27L1/025Debarking in rotating drums

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  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Wood Science & Technology (AREA)
  • Forests & Forestry (AREA)
  • Debarking, Splitting, And Disintegration Of Timber (AREA)
  • Tyre Moulding (AREA)
  • Rolls And Other Rotary Bodies (AREA)
  • Discharging, Photosensitive Material Shape In Electrophotography (AREA)
  • Paper (AREA)
  • Apparatuses For Bulk Treatment Of Fruits And Vegetables And Apparatuses For Preparing Feeds (AREA)

Description

Fremgangsmåte til fremstilling av a,p-umettede ketosteroider som ved (5-carbonatoniet har en methylgruppe. Process for the production of a,p-unsaturated ketosteroids in which the (5-carbonatonium) has a methyl group.

Fra tysk patentskrift nr. 1 023 764 er From German patent document no. 1 023 764 is

det kjent at man kan fremstille a,(3-umet-tede ketosteroider som bærer en methylgruppe på carbonatomet i (3-stillingen, ved termisk spaltning av pyrazoliner som kan fåes ved tilleiring av diazomethan til car-bon-til-carbon-dobbeltbindingen i a,(3-umettede ketoner. Den termiske spaltning av sådanne pyrazoliner er imidlertid en prosess som er vanskelig å beherske ved ut-førelse i industriell målestokk og i høyt vakuum. It is known that a,(3-unsaturated ketosteroids bearing a methyl group on the carbon atom in the (3-position) can be prepared by thermal cleavage of pyrazolines which can be obtained by adding diazomethane to the carbon-to-carbon double bond in a ,(3-unsaturated ketones. The thermal cleavage of such pyrazolines is, however, a process that is difficult to master when carried out on an industrial scale and in high vacuum.

Man har derfor bestrebet seg på å er-statte den termiske spaltning av vedkommende pyrazoliner med på sikrere måte ut-førbare arbeidsmåter og har for dette formål foreslått anvendelse av katalysatorer (se tyske patentskrifter nr. 1 096 353 og nr. Efforts have therefore been made to replace the thermal decomposition of the pyrazolines in question with methods that can be carried out in a safer manner and, for this purpose, the use of catalysts has been proposed (see German patent documents no. 1 096 353 and no.

1 107 663). Herved har det imidlertid vist 1,107,663). Hereby, however, it has shown

seg at bruken av de først anvendte sterkt sure katalysatorer som perklorsyre, fluor-borsyre eller bortrifluoridetherat oppløst i et egnet organisk oppløsningsmiddel visst-nok bevirker den ønskede nitrogenavspalt-ning allerede ved romtemperatur, men ved siden av de ønskede a,(3-umettede (3-methylketosteroider fortrinnsvis frembringer dannelse av de med disse isomere a,|3-methylen-ketosteroider. It can be seen that the use of the first used strongly acidic catalysts such as perchloric acid, fluoroboric acid or boron trifluoride etherate dissolved in a suitable organic solvent certainly causes the desired nitrogen decomposition already at room temperature, but next to the desired α,(3-unsaturated ( 3-methylketosteroids preferentially produce formation of those with these isomeric α,|3-methylene ketosteroids.

Der ble nu funnet at man allikevel It was now found that one anyway

kan rette den katalytiske nitrogenavspalt-ning fra vedkommende pyrazoliner mot en helt overveiende dannelse av a,|3-umettede (3-methylketosteroider når man sørger for at denne spaltning foregår ikke på en sur can direct the catalytic nitrogen cleavage from the pyrazolines in question towards a predominantly formation of α,|3-unsaturated (3-methylketosteroids when it is ensured that this cleavage does not take place on an acidic

katalysator i homogen oppløsning, men på grenseflaten av et surt adsorpsjonsmiddel som er oppløst eller suspendert i et opp-løsningsmiddel som fortrinnsvis bare i liten grad eluerer pyrazolinet. Dette var ikke å forutse. catalyst in homogeneous solution, but on the interface of an acidic adsorbent which is dissolved or suspended in a solvent which preferably only elutes the pyrazoline to a small extent. This was not to be expected.

Særlig godt egnede adsorpsjonsmidler i fremgangsmåten ifølge oppfinnelsen er først og fremst de adsorpsjonsmidler som anvendes i adsorpsjonskromatografien som aluminiumoxyd, silikagel, blekejord, ione-utvekslere og lignende. Slike adsorpsjonsmidler må imidlertid når de ikke i seg selv reagerer surt, aktiveres ved syrebehand-ling på i og for seg kjent måte for å være virksomme for foreliggende oppfinnelses formål, og de må efter syrebehandlingen bibeholde en viss syregrad. Dette kontrolle-res hensiktsmessig ved å suspendere en prøve av det syrebehandlede og efterpå tør-rede adsorpsjonsmiddel i en bestemt mengde vann og bestemme suspensjonens pH-verdi før anvendelsen. Particularly suitable adsorbents in the method according to the invention are primarily the adsorbents used in adsorption chromatography such as aluminum oxide, silica gel, bleaching earth, ion exchangers and the like. Such adsorbents, however, when they do not themselves react acidly, must be activated by acid treatment in a manner known per se in order to be effective for the purposes of the present invention, and they must retain a certain degree of acidity after the acid treatment. This is conveniently checked by suspending a sample of the acid-treated and subsequently dried adsorbent in a specific amount of water and determining the pH value of the suspension before use.

Til utførelse av spaltningen ifølge oppfinnelsen suspenderes det tørre sure adsorpsjonsmiddel i et likeledes tørt organisk oppløsningsmiddel ved omrøring eller ryst-ning. Det pyrazolin som skal spaltes til-føres enten i finpulverisert tilstand eller oppløst i suspensjonen av det sure adsorpsjonsmiddel. Man omrører eller ryster derpå inntil nitrogenutviklingen opphører, fraskiller adsorpsjonsmidlet og behandler det med et best mulig eluerende oppløs-ningsmiddel for å oppløse resterende reak-sjonsprodukter fra adsorpsjonsmidlet. Re-aksjonsproduktene isoleres derpå ved for-dampning av oppløsningsmidlet og renses om nødvendig på vanlig måte. To carry out the cleavage according to the invention, the dry acidic adsorbent is suspended in a similarly dry organic solvent by stirring or shaking. The pyrazoline to be split is supplied either in a finely powdered state or dissolved in the suspension of the acidic adsorbent. One then stirs or shakes until nitrogen evolution ceases, separates the adsorbent and treats it with the best possible eluting solvent to dissolve remaining reaction products from the adsorbent. The reaction products are then isolated by evaporation of the solvent and, if necessary, purified in the usual way.

Det er bemerkelsesverdig at spalt-ningsmetoden ifølge oppfinnelsen også kan anvendes på sådanne pyrazoliner som er-faringsmessig ikke lar seg spalte under anvendelse av den tidligere foreslåtte spalt-ningsmetode, som f. eks. diazomethantillei-ringsproduktene av A^-ketosteroider. Slike forbindelser er i virkeligheten A<2->pyrazoliner (i det infrarøde område: sterke C = N-bånd ved 6,45 \ i, mot rødt forskjøvne («rotverschobene») keto-bånd ved 6,96 \ i — som følge av konjugasjon til 3-ketogruppen — til forskjell fra de A<1->pyrazoliner som dannes ved tilleiring av diazomethan til A1'4',<i->ketosteroider eller A<1>(<5->20-ketosteroider — i det infrarøde område svakt N = N-bånd ved 6,4—6,45 [ i, keto-bånd i det nor-male område). Denne forskjell i konstitu-sjonen kan være grunnen til at spaltningen under de hittil anvendte betingelser ikke inntreffer. Det antas at der ved hjelp av adsorpsjonsmidlet primært oppstår en annen pyrazolinforbindelse av A<2->pyrazo-linene, en forbindelse som er lett spaltbar. It is noteworthy that the cleavage method according to the invention can also be applied to such pyrazolines which experience-wise cannot be cleaved using the previously proposed cleavage method, such as e.g. the diazomethane addition products of A^-ketosteroids. Such compounds are in reality A<2->pyrazolines (in the infrared region: strong C = N bands at 6.45 \ i, against red-shifted ("rotverschobene") keto bands at 6.96 \ i — as a result of conjugation to the 3-keto group — in contrast to the A<1->pyrazolines which are formed by addition of diazomethane to A1'4',<i->ketosteroids or A<1>(<5->20-ketosteroids — in that infrared region weak N = N-band at 6.4-6.45 [i, keto-band in the normal range).This difference in the constitution may be the reason why the cleavage does not occur under the conditions used so far. It is believed that with the aid of the adsorbent, another pyrazoline compound of the A<2->pyrazolines, a compound which is easily cleavable, is primarily formed.

Utgangsmaterialene for fremgangsmåten ifølge oppfinnelsen kan være sub-stituert på hvilkensomhelst måte. Således kan de ha substituenter bestående av frie eller forestrede OH-grupper eller frie eller i funksjonell henseende endrede ketogrup-per, eller halogenatomer. Som forestrede hydroxylgrupper kommer der fortrinnsvis i betraktning hydroxylgrupper som er forestret med alifatiske, alicycliske, aralifa-tiske, aromatiske eller heterocycliske car-boxylsyrer med fra 1 til 11 carbonatomer i molekylet, f. eks. med eddiksyre, kloreddik-syre, propionsyre, smørsyre, diethyleddik-syre, ønanthsyre, caprylsyre, undecylen-syre, cyclopentylpropionsyre, ravsyre, phe-nyleddiksyre, furancarbonsyre, fenoxy-eddiksyre, caprinoyleddiksyre og benzoe-syre. The starting materials for the method according to the invention can be substituted in any way. Thus, they can have substituents consisting of free or esterified OH groups or free or functionally altered keto groups, or halogen atoms. Esterified hydroxyl groups preferably include hydroxyl groups which are esterified with aliphatic, alicyclic, araliphatic, aromatic or heterocyclic carboxylic acids with from 1 to 11 carbon atoms in the molecule, e.g. with acetic acid, chloroacetic acid, propionic acid, butyric acid, diethylacetic acid, enanthic acid, caprylic acid, undecylenic acid, cyclopentylpropionic acid, succinic acid, phenylacetic acid, furancarboxylic acid, phenoxyacetic acid, caprinoyacetic acid and benzoic acid.

I det følgende beskrives som eksempler noen utførelsesformer for oppfinnelsen. In the following, some embodiments of the invention are described as examples.

Eksempel 1. Example 1.

5 g (A-"-pyrazolino)-4', 3' : l,2a-andro-stan-17|3-ol-3-on kokes under tilbakeløps-kjøling og omrøring i 15 timer (natten over) i 750 ml carbontetraklorid med 235 g sur silikagel. (Den sure silikagel fremstilles av nøytral tørr silikagel ved suspensjon i IN saltsyre, frafiltrering av saltsyren efter 12 timer og tørring i 20 timer ved 120° C). 5 g of (A-"-pyrazolino)-4', 3' : 1,2a-andro-stan-17|3-ol-3-one is boiled under reflux cooling and stirring for 15 hours (overnight) in 750 ml carbon tetrachloride with 235 g of acidic silica gel (The acidic silica gel is prepared from neutral dry silica gel by suspension in IN hydrochloric acid, filtering off the hydrochloric acid after 12 hours and drying for 20 hours at 120° C).

Silikagelen frafiltreres og eftervaskes med ca. 2 liter eddikester. Filtratene blandes og inndampes til tørrhet. Det herved erholdte råprodukt veier 4,5 g (UV.: e^o = 8100, <e>2;)7 = 2700, N = 1 pst.) og oppvarmes på dampbad i iy2 time med 15 ml pyridin_ og 9 ml eddiksyreanhydrid. Den erholdte oppløsning blandes med isvann under om-røring. Blandingen ekstraheres med ether, og etherekstrakten vaskes først med IN saltsyre, derpå med natriumbikarbonat-oppløsning og sluttelig med vann. Ekstrak-tet tørres derpå over natriumsulfat og inndampes til tørrhet i vakuum. Residuet kromatograferes gjennom nøytral silikagel (10 pst. vann). Med methylenklorid isoleres i en første fraksjon 1 g av et blandet produkt og derpå 3,1 g rått 1-methyl-A<1->androsten-17(3-ol-3-on-17-acetat. The silica gel is filtered off and washed with approx. 2 liters of vinegar. The filtrates are mixed and evaporated to dryness. The crude product thus obtained weighs 4.5 g (UV.: e^o = 8100, <e>2;)7 = 2700, N = 1 per cent) and is heated on a steam bath for 1y2 hours with 15 ml of pyridine_ and 9 ml of acetic anhydride . The obtained solution is mixed with ice water while stirring. The mixture is extracted with ether, and the ether extract is first washed with 1N hydrochloric acid, then with sodium bicarbonate solution and finally with water. The extract is then dried over sodium sulphate and evaporated to dryness in vacuo. The residue is chromatographed through neutral silica gel (10% water). With methylene chloride, 1 g of a mixed product and then 3.1 g of crude 1-methyl-A<1->androstene-17(3-ol-3-one-17-acetate) are isolated in a first fraction.

Ved omkrystallisasjon fra isopropylether får man 2,2 g rent produkt med smeltepunkt 140—141° C. Recrystallization from isopropyl ether gives 2.2 g of pure product with a melting point of 140-141° C.

Eksempel 2. Example 2.

4,0 g (A<2>'-pyrazolino)-4', 3' : l,2a-androstan-17(3-ol-3-on oppvarmes under tilbakeløpskjøling og omrøring med 200 g surt aluminiumoxyd (fremstilling se neden-for) og 400 ml carbontetraklorid i 3 døgn. Blandingen avkjøles derpå, aluminiumoxydet frafiltreres og eftervaskes med ca. 2 liter eddikester. Efter inndampning av opp-løsningen omkrystalliseres der fra isopropylether. Det herved erholdte 1-methyl-A^androsten-np-ol-S-on smelter ved 150 —152° C. UV.: E2I() = 13 300. 4.0 g of (A<2>'-pyrazolino)-4', 3': 1,2a-androstan-17(3-ol-3-one is heated under reflux and stirring with 200 g of acidic aluminum oxide (preparation see below- for) and 400 ml of carbon tetrachloride for 3 days. The mixture is then cooled, the aluminum oxide is filtered off and washed with approx. 2 liters of acetic acid. After evaporation of the solution, it is recrystallized from isopropyl ether. 1-methyl-A^androsten-np-ol is thereby obtained -S-on melts at 150 —152° C. UV.: E2I() = 13,300.

For å få ytterligere mengder av for-bindelsen ekstraheres det frafiltrerte aluminiumoxyd varmt med eddikester. Eks-traktet inndampes til tørrhet og residuet blandes med den inndampede moderlut fra fremstillingen av den ovenfor angitte rene forbindelse. Man forestrer og kromatogra-ferer således som angitt i eksempel 1. Man får herved en ytterligere mengde 1-methyl-A<1->androsten-17(3-ol-3-on som 17-acetat. Forbindelsens smeltepunkt er 137—138° C. To obtain further amounts of the compound, the filtered aluminum oxide is extracted hot with vinegar. The extract is evaporated to dryness and the residue is mixed with the evaporated mother liquor from the preparation of the pure compound indicated above. It is thus esterified and chromatographed as indicated in example 1. This gives a further amount of 1-methyl-A<1->androsten-17(3-ol-3-one as 17-acetate. The compound's melting point is 137-138 °C.

Fremstilling av surt aluminiumoxyd. Production of acidic aluminum oxide.

250 g aluminiumoxyd (surt) omrøres 5 timer ved romtemperatur i 500 ml carbontetraklorid som på forhånd er mettet med tørr hydrogenklorid. Aluminiumoxydet frafiltreres derpå, eftervaskes med rent carbontetraklorid og tørres 1 time ved 50° C under vannstrålepumpevakuum. 250 g of aluminum oxide (acidic) is stirred for 5 hours at room temperature in 500 ml of carbon tetrachloride which is previously saturated with dry hydrogen chloride. The aluminum oxide is then filtered off, washed with pure carbon tetrachloride and dried for 1 hour at 50° C under a water jet pump vacuum.

Eksempel 3. Example 3.

1 g (A"-pyrazolino)-4', 3' : l,2a-A<4>'<ft->androstadien-17|3-ol-3-on-17-acetat og 50 g sur silikagel (forbehandlet således som beskrevet i eksempel 1) omrøres 16 timer ved romtemperatur i 150 ml carbontetraklorid. Silikagelen frafiltreres og eftervaskes med eddikester. Oppløsningen inndampes til tørrhet i vakuum, og det erholdte residuum omkrystalliseres fra isopropylether. Man får l-methyl-A<1>'<4>'<n->androstatrien-17(3-ol-3-on-17-acetat med smeltepunkt 219— 221° C. 1 g (A"-pyrazolino)-4', 3' : 1,2a-A<4>'<ft->androstadien-17|3-ol-3-one-17-acetate and 50 g acidic silica gel (pretreated as described in example 1) is stirred for 16 hours at room temperature in 150 ml of carbon tetrachloride. The silica gel is filtered off and washed with ethyl acetate. The solution is evaporated to dryness in a vacuum, and the residue obtained is recrystallized from isopropyl ether. One obtains l-methyl-A<1>' <4>'<n->androstatriene-17(3-ol-3-one-17-acetate with melting point 219— 221° C.

[a] 2D" = —95° (c = 1,015 i kloroform). UV.: 82u!, = 16 050: £,(i2 = 13 660: e29!) <=> 9 240. [a] 2D" = —95° (c = 1.015 in chloroform). UV.: 82u!, = 16,050: £,(i2 = 13,660: e29!) <=> 9,240.

Eksempel 4. Example 4.

1,0 g (A1'-pyrazolino)-4\ 3' : l^a-A<4>'"-pregnadien-17a-ol-3,20-dion-17-acetat om-røres med 50 g surt aluminiumoxyd (frem-stillet således som angitt i eksempel 2) og 50 ml carbontetraklorid i 48 timer ved romtemperatur. Produktet opparbeides derpå således som angitt i eksempel 2. Det stoff man får ved utrystning med eddikester kromatograferes over silikagel som inneholder 10 pst. vann. Man får herved med methylenklorid l-methyl-A1'4>(i-pregnatri-en-17a-ol-3,20-dion-17-acetat som efter omkrystallisasjon fra isopropylether har smeltepunkt 195,5—196° C. 1.0 g of (A1'-pyrazolino)-4\3':1^a-A<4>'"-pregnadien-17a-ol-3,20-dione-17-acetate is stirred with 50 g of acidic aluminum oxide (before -stilled as indicated in example 2) and 50 ml of carbon tetrachloride for 48 hours at room temperature. The product is then worked up as indicated in example 2. The substance obtained by shaking with vinegar is chromatographed over silica gel containing 10% water. This gives with methylene chloride.

UV.: £20!) = 14 890: e2M = 12 660: e:i;i, <=> 8 800. UV.: £20!) = 14,890: e2M = 12,660: e:i;i, <=> 8,800.

Eksempel 5. Example 5.

500 g (A^-pyrazolinoM', 3' : 16,17-[A<5->pregnen-3(3-ol-20-on-acetat] oppvarmes med 25 g surt aluminiumoxyd (frem-stillet således som angitt i eksempel 2) og 60 ml carbontetraklorid i 48 timer under omrøring og tilbakeløpskjøling. Produktet oppvarmes således som angitt i eksempel 2. Det stoff man får ved utrystning med eddikester utrives med pentan og det herved erholdte ie-methyl-A^^-pregnadien-313-ol-20-on-3-acetat i form av råprodukt omkrystalliseres fra aceton. Forbindelsens smeltepunkt er 166—169° C. Efter ytterligere omkrystallisasjon er smeltepunktet 173 —175° C. 500 g of (A^-pyrazolinoM', 3' : 16,17-[A<5->pregnen-3(3-ol-20-one-acetate)] are heated with 25 g of acidic aluminum oxide (prepared as indicated in example 2) and 60 ml of carbon tetrachloride for 48 hours with stirring and reflux cooling. The product is heated as indicated in example 2. The substance obtained by shaking with acetic acid is triturated with pentane and the thereby obtained ie-methyl-A^^-pregnadiene-313 -ol-20-one-3-acetate in the form of crude product is recrystallized from acetone. The compound's melting point is 166-169° C. After further recrystallization, the melting point is 173-175° C.

UV.: zm = 8 900: UV.: zm = 8,900:

Eksempel 6. Example 6.

2,0 g (A<2>'-pyrazolino)-4', 3' : 1,2a-androstan-17(3-ol-3-on-17-propionat behandles med surt aluminiumoxyd og 200 ml eddikester således som angitt i eksempel 2 og opparbeides. Det herved erholdte råpro- 2.0 g of (A<2>'-pyrazolino)-4', 3': 1,2a-androstane-17(3-ol-3-one-17-propionate) are treated with acidic aluminum oxide and 200 ml of acetic acid as indicated in example 2 and processed.

dukt kromatograferes i nøytral silikagel som inneholder 10 pst. vann. Efter omkrystallisasjon fra methanol smelter det herved erholdte l-methyl-A^androsten-np-ol-3-on-17-propionat ved 120,5—121° C. duct is chromatographed in neutral silica gel containing 10% water. After recrystallization from methanol, the 1-methyl-α-androstene-np-ol-3-one-17-propionate thus obtained melts at 120.5-121° C.

Eksempel 7. Example 7.

2,0 g (A<2>'-pyrazolino)-4', 3' : l,2a-androstan-17(3-ol-3-on-17-capronat behandles med surt aluminiumoxyd og 200 ml carbontetraklorid således som angitt i eksempel 6, opparbeides og produktet kromatograferes. Man får herved 1-methyl-A<1->androsten-17(3-ol-3-on-17-capronat med smeltepunkt 69—71° C og UV-verdi £=,,,, = 13 000. 2.0 g of (A<2>'-pyrazolino)-4', 3':1,2a-androstane-17(3-ol-3-one-17-capronate) is treated with acidic aluminum oxide and 200 ml of carbon tetrachloride as indicated in example 6, is worked up and the product is chromatographed. This gives 1-methyl-A<1->androstene-17(3-ol-3-one-17-capronate with melting point 69-71° C and UV value £=, ,,, = 13,000.

Eksempel 8. Example 8.

2,0 g (A<2>'-pyrazolino)-4', 3' : l,2a-androstan-17(3-ol-3-on-17-|3-cyclopentyl-propionat behandles på samme måte som i eksempel 7, opparbeides og kromatograferes. Det herved erholdte 1-methyl-A<1->androsten-17(3-ol-3-on-17-cyclopentyl-propionat smelter ved ca. —8°. 2.0 g of (A<2>'-pyrazolino)-4', 3' : 1,2a-androstane-17(3-ol-3-one-17-|3-cyclopentyl-propionate) is treated in the same way as in example 7, is worked up and chromatographed. The 1-methyl-A<1->androstene-17(3-ol-3-one-17-cyclopentyl-propionate thus obtained melts at about -8°.

UV.: 82:)9 = 12 700. UV.: 82:)9 = 12,700.

Eksempel 9. Example 9.

1 g (A<2>'-pyrazolino)-4', 3' : l,2«-andro-stan-17(3-ol-3-on-17-acetat oppvarmes under tilbakeløpskjøling med 50 g sur silikagel i 150 ml eddikester. Silikagelen frafiltreres derpå, eftervaskes med 500 ml eddikester, hvorpå oppløsningsmidlet avdestilleres i vakuum. Det erholdte residuum omkrystalliseres fra isopropylether. Man får herved l-methyl-A<1->androsten-l7(3-ol-3-on-17-acetat som smelter ved 140—141° C. 1 g of (A<2>'-pyrazolino)-4', 3':1,2'-andro-stan-17(3-ol-3-one-17-acetate is heated under reflux with 50 g of acidic silica gel in 150 ml of acetic acid. The silica gel is then filtered off, washed with 500 ml of acetic acid, after which the solvent is distilled off in a vacuum. The residue obtained is recrystallized from isopropyl ether. This gives l-methyl-A<1->androstene-l7(3-ol-3-one- 17-acetate which melts at 140-141° C.

[a]n = + 39 (CHC1S: c = 1) UV.: e,,|(J = 13 300. [a]n = + 39 (CHC1S: c = 1) UV.: e,,|(J = 13 300.

Eksempel 10. Example 10.

1 g (A<2>'-pyrazolino)-4', 3' : l,2a-andro-stan-17(3-ol-3-on-17-ønanthat i 150 ml carbontetraklorid behandles med 50 g sur silikagel således som angitt i eksempel 8 og opparbeides. Det erholdte residuum omkrystalliseres fra methanol. Man får 1-methyl-A1 -androsten- 17(3-ol-3-on-17-ønanthat som smelter ved 70—70,5° C. 1 g of (A<2>'-pyrazolino)-4', 3': 1,2a-andro-stan-17(3-ol-3-one-17-oenanthate in 150 ml of carbon tetrachloride is treated with 50 g of acidic silica gel as follows as indicated in example 8 and worked up. The residue obtained is recrystallized from methanol. 1-methyl-A1 -androstene-17(3-ol-3-one-17-oenanthate is obtained which melts at 70-70.5° C.

[a]D = + 32 (CHC1, : c = 1) UV.: E,4() <= >13 000. [a]D = + 32 (CHC1, : c = 1) UV.: E,4() <= >13,000.

Eksempel 11. Example 11.

1 g (A<2>'-pyrazolino)-4', 3' : l,2<x-andro-stan-17p-ol-3-on-17-caprylat i 150 ml carbontetraklorid behandles således som angitt i eksempel 8 med 50 g sur silikagel, 1 g of (A<2>'-pyrazolino)-4', 3': 1,2<x-andro-stan-17p-ol-3-one-17-caprylate in 150 ml of carbon tetrachloride is thus treated as indicated in example 8 with 50 g of acidic silica gel,

hvorpå der opparbeides, likeledes som beskrevet i eksempel 8. Man får 1-methyl-A<1->after which it is worked up, likewise as described in example 8. One obtains 1-methyl-A<1->

androsten-17|3-ol-3-on-17-caprylat med androsten-17|3-ol-3-one-17-caprylate with

smeltepunkt 72—73,5° C. UV.: e210 = 13 100. melting point 72-73.5° C. UV.: e210 = 13 100.

Claims (4)

1. Fremgangsmåte til fremstilling av1. Method for the production of a,|3-umettede ketosteroider som ved (3-carbonatomet har en methylgruppe, karakterisert ved at man behandler pyrazoliner som fåes ved tilleiring av diazomethan til a,(3-umettede ketosteroider, i et organisk oppløsningsmiddel med adsorb-sjonsmidler i surt miljø inntil nitrogenutviklingen er opphørt, hvorpå man på vanlig måte fraskiller og renser reaksjons- produktene. α,|3-unsaturated ketosteroids which have a methyl group at the (3-carbon atom), characterized by treating pyrazolines obtained by addition of diazomethane to α,(3-unsaturated ketosteroids, in an organic solvent with adsorbents in an acidic environment until nitrogen evolution has ceased, after which the reaction products are separated and purified in the usual way. 2. Fremgangsmåte ifølge påstand 1, karakterisert ved at man som ut-gangsmateriale anvender pyrazoliner med følgende generelle formel: hydroxylgruppen også kan foreligge i forestret tilstand. 2. Process according to claim 1, characterized in that pyrazolines with the following general formula are used as starting material: the hydroxyl group can also be present in the esterified state. 3. Fremgangsmåte ifølge påstand 1, karakterisert ved at man som ut-gangsmateriale anvender pyrazoliner med følgende generelle formel: i hvilken R, X og Y har den i påstand 2 angitte betydning. 3. Process according to claim 1, characterized in that pyrazolines with the following general formula are used as starting material: in which R, X and Y have the meaning stated in claim 2. 4. Fremgangsmåte ifølge påstand 1, karakterisert ved at man som ut-gangsmateriale anvender pyrazoliner med følgende generelle formel: i hvilken R, betegner hydrogen (eller en fri eller en forestret hydroxylgruppe, R2 beteg- hvorved slike forbindelser dessuten kan inneholde en oxygenfunksjon i 11- eller 12-stillingen og/eller dertil en dobbeltbinding i 5-stillingen (A<4> eller A<5>).4. Process according to claim 1, characterized in that pyrazolines with the following general formula are used as starting material: in which R, denotes hydrogen (or a free or an esterified hydroxyl group, R2 denotes- whereby such compounds may also contain an oxygen function in the 11- or 12-position and/or in addition a double bond in the 5-position (A<4> or A<5>).
NO3736/73A 1972-10-16 1973-09-24 DRUM MACHINE OF THE DRUM TYPE. NO138199C (en)

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AT397060B (en) * 1988-09-01 1994-01-25 Andritz Ag Maschf HOLLOW CYLINDRICAL, FULL-WALLED BLEEDING DRUM
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US5896901A (en) * 1998-03-12 1999-04-27 Les Installations Soudins (1990) Inc. Debarking drum
US5839490A (en) * 1998-03-17 1998-11-24 Svedala Industries, Inc. Rubber lining for corrugated debarking drum
FI112183B (en) * 1999-12-31 2003-11-14 Andritz Ag Maschf Device for barking or pretreatment for barking of trees
CN104908131A (en) * 2015-06-25 2015-09-16 吉首大学 Straight cylinder straight propeller type branch-equipped mullberry twig peeling apparatus
RU169680U1 (en) * 2016-04-28 2017-03-28 Федеральное государственное бюджетное образовательное учреждение высшего образования "Петрозаводский государственный университет" DRINKING SECTION
WO2020066188A1 (en) 2018-09-26 2020-04-02 ニチバン株式会社 Water-containing transdermal patch
WO2021193874A1 (en) 2020-03-27 2021-09-30 ニチバン株式会社 Transdermal patch

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US2943656A (en) * 1956-08-24 1960-07-05 Coosa River News Print Company Pulpwood-debarking drum having angularly slotted wall and stationary shearing bars
US3080898A (en) * 1960-04-22 1963-03-12 Combustion Eng Tunnel barker
US3136345A (en) * 1961-05-11 1964-06-09 Ibis Entpr Ltd Barking drum

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DE2348069B2 (en) 1981-06-04
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NO138199C (en) 1978-08-02
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ATA855573A (en) 1976-10-15
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US3807470A (en) 1974-04-30
JPS5650684B2 (en) 1981-12-01

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