NL8700358A - CHEMICAL METHOD. - Google Patents
CHEMICAL METHOD. Download PDFInfo
- Publication number
- NL8700358A NL8700358A NL8700358A NL8700358A NL8700358A NL 8700358 A NL8700358 A NL 8700358A NL 8700358 A NL8700358 A NL 8700358A NL 8700358 A NL8700358 A NL 8700358A NL 8700358 A NL8700358 A NL 8700358A
- Authority
- NL
- Netherlands
- Prior art keywords
- formula
- compound
- process according
- hal
- carried out
- Prior art date
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C251/00—Compounds containing nitrogen atoms doubly-bound to a carbon skeleton
- C07C251/72—Hydrazones
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C45/00—Preparation of compounds having >C = O groups bound only to carbon or hydrogen atoms; Preparation of chelates of such compounds
- C07C45/51—Preparation of compounds having >C = O groups bound only to carbon or hydrogen atoms; Preparation of chelates of such compounds by pyrolysis, rearrangement or decomposition
- C07C45/516—Preparation of compounds having >C = O groups bound only to carbon or hydrogen atoms; Preparation of chelates of such compounds by pyrolysis, rearrangement or decomposition involving transformation of nitrogen-containing compounds to >C = O groups
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C49/00—Ketones; Ketenes; Dimeric ketenes; Ketonic chelates
- C07C49/20—Unsaturated compounds containing keto groups bound to acyclic carbon atoms
- C07C49/255—Unsaturated compounds containing keto groups bound to acyclic carbon atoms containing ether groups, groups, groups, or groups
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- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
- Low-Molecular Organic Synthesis Reactions Using Catalysts (AREA)
Description
- Chemische werkwijze -- Chemical method -
De uitvinding heeft betrekking op een werkwijze voor de bereiding van 4-(6-methoxy-2-na£tyl)butan-2-on en op tussenprodukten die bij deze synthese gebruikt kunnen worden.The invention relates to a process for the preparation of 4- (6-methoxy-2-sodium) butan-2-one and to intermediates which can be used in this synthesis.
^ Het Amerikaanse octrooischrift 4.061.779 beschrijft 4-(6-methoxy-2-naftyl)-butan-2-on (nabumeton) en het gebruik ervan bij de behandeling van rheumatische en artritische aandoeningen. Een aantal werkwijzen voor de bereiding van de verbinding worden eveneens beschreven. De Amerikaanse octrooi- ^ schriften 4.221.741 en 4.247.709 beschrijven andere werkwijzen voor de bereiding van nabumeton.^ U.S. Patent 4,061,779 describes 4- (6-methoxy-2-naphthyl) -butan-2-one (nabumetone) and its use in the treatment of rheumatic and arthritic conditions. A number of methods for the preparation of the compound are also described. U.S. Patents 4,221,741 and 4,247,709 describe other processes for the preparation of nabumetone.
Een nieuwe werkwijze voor de bereiding van nabumeton is nu gevonden , welke werkwijze gekenmerkt wordt door de vorming van een hydrazon, gevolgd door hydrolyse.A new process for the preparation of nabumetone has now been found, which process is characterized by the formation of a hydrazone followed by hydrolysis.
^ Dienovereenkomstig verschaft de uitvinding een werkwijze voor de bereiding van 4-(6-methoxy-2-naftyl)butan-2-on^ welke werkwijze omvat de reaktie van een verbinding met formule 1 waarin Hal halogeen is , met een verbinding piet formule 2 waarin M een alkalimetaal is en R. en R alkylgroepen 20 · ^ met 1 tot 6 koolstofatomen zijn, gevolgd door zure hydrolyse.Accordingly, the invention provides a process for the preparation of 4- (6-methoxy-2-naphthyl) butan-2-one, which process comprises reacting a compound of formula 1 wherein Hal is halogen, with a compound of formula 2 wherein M is an alkali metal and R 1 and R are alkyl groups of 1 to 6 carbon atoms, followed by acid hydrolysis.
Hal is bij voorkeur chloor en MHal is preferably chlorine and M.
is bij voorkeur lithium. Rj en R2 zijn bij voorkeur beide methyl.is preferably lithium. Preferably R 1 and R 2 are both methyl.
De reaktie heeft in een inert oplosmiddel , zoals tetrahydrofuran, bij omgevingstemperatuur plaats.The reaction takes place in an inert solvent, such as tetrahydrofuran, at ambient temperature.
^ De reaktie geschiedt via een tussenprodukt met formule 3. De erop volgende hydrolyse van de verbinding met formule 3 heeft plaats onder zure omstandigheden met bijvoorbeeld zoutzuur/water bij omgevingstemperatuur, bijvoorbeeld 20-30°C.The reaction takes place via an intermediate of the formula 3. The subsequent hydrolysis of the compound of the formula 3 takes place under acidic conditions with, for example, hydrochloric acid / water at ambient temperature, for example 20-30 ° C.
ΟΛ ^ #ΟΛ ^ #
De verbinding met formule 2 wordt doelmatig in situ bereid uit aceton en Ν,Ν-dimethylhydrazine.The compound of formula II is conveniently prepared in situ from acetone and Ν, Ν-dimethylhydrazine.
Verbindingen met de formule 1 zijn bekend.Compounds of the formula I are known.
Verbindingen met formule 3 zijn nieuw en vormen een aspect van de uitvinding .Compounds of formula 3 are new and form an aspect of the invention.
OC ...OC ...
Het volgende voorbeeld licht de uitvinding toe.The following example illustrates the invention.
8700358 *·» Ni 9 - 2 -8700358 * · »Ni 9 - 2 -
Voorbeeld (zie reaktieschema A)Example (see reaction scheme A)
Het hydrazon met formule 4 werd kwantitatief verkregen als een olie uit 2-chloormethyl-6-methoxynaftaleen en het in situ bereide lithium-N,N'-dimethylhydrazon van aceton 5 (zie Yamashita et. al. Bull.Chem. Soc. Jpn 58 , 407-408 (1985)).The hydrazone of formula 4 was obtained quantitatively as an oil from 2-chloromethyl-6-methoxynaphthalene and the lithium N, N'-dimethylhydrazone of acetone 5 prepared in situ (see Yamashita et. Al. Bull. Chem. Soc. Jpn 58 407-408 (1985)).
Het hydrazon met formule 4 werd behandeld met 5 M zoutzuur' bij kamertemperatuur onder verkrijging van het produkt met formule 5 in 95% opbrengst en met een zuiverheid van 80% (opbrengst aan zuiver produkt 76%).The hydrazone of the formula IV was treated with 5 M hydrochloric acid at room temperature to obtain the product of the formula 5 in 95% yield and with a purity of 80% (yield of pure product 76%).
10 870035810 8700358
Claims (10)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB8603778 | 1986-02-15 | ||
GB868603778A GB8603778D0 (en) | 1986-02-15 | 1986-02-15 | Chemical process |
Publications (1)
Publication Number | Publication Date |
---|---|
NL8700358A true NL8700358A (en) | 1987-09-01 |
Family
ID=10593134
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
NL8700358A NL8700358A (en) | 1986-02-15 | 1987-02-13 | CHEMICAL METHOD. |
Country Status (8)
Country | Link |
---|---|
JP (1) | JPS62195344A (en) |
CH (1) | CH670084A5 (en) |
DK (1) | DK75487A (en) |
ES (1) | ES2004879A6 (en) |
GB (1) | GB8603778D0 (en) |
GR (1) | GR870258B (en) |
NL (1) | NL8700358A (en) |
SE (1) | SE465926B (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5756851A (en) * | 1996-10-21 | 1998-05-26 | Albemarle Corporation | Production of nabumetone or precursors thereof |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4943579A (en) * | 1987-10-06 | 1990-07-24 | The United States Of America As Represented By The Secretary Of The Department Of Health And Human Services | Water soluble prodrugs of camptothecin |
DE3829586A1 (en) * | 1988-09-01 | 1990-03-22 | Bayer Ag | DISUBSTITUTED NAPHTHALINE, METHOD FOR THE PRODUCTION AND THEIR USE OF HERBICIDES |
CU23844B1 (en) * | 2009-04-17 | 2012-10-15 | Ct De Neurociencias De Cuba | PROCEDURE FOR OBTAINING NEW DERIVATIVES OF NAFTALENE FOR THE LIVE DIAGNOSIS OF ALZHEIMER'S DISEASE |
-
1986
- 1986-02-15 GB GB868603778A patent/GB8603778D0/en active Pending
-
1987
- 1987-02-13 ES ES8700375A patent/ES2004879A6/en not_active Expired
- 1987-02-13 GR GR870258A patent/GR870258B/en unknown
- 1987-02-13 DK DK75487A patent/DK75487A/en unknown
- 1987-02-13 CH CH53687A patent/CH670084A5/en not_active IP Right Cessation
- 1987-02-13 SE SE8700594A patent/SE465926B/en unknown
- 1987-02-13 NL NL8700358A patent/NL8700358A/en not_active Application Discontinuation
- 1987-02-14 JP JP3229587A patent/JPS62195344A/en active Pending
Non-Patent Citations (1)
Title |
---|
M. YAMASHITA ET AL.: "The Facile Synthesis of Unsymmetrical Ketones Using Acetone Dimethylhydrazone", BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN, vol. 58, 1985, TOKYO JP, pages 407 - 408 * |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5756851A (en) * | 1996-10-21 | 1998-05-26 | Albemarle Corporation | Production of nabumetone or precursors thereof |
US5907069A (en) * | 1996-10-21 | 1999-05-25 | Albemarle Corporation | Production of nabumetone or precursors thereof |
Also Published As
Publication number | Publication date |
---|---|
JPS62195344A (en) | 1987-08-28 |
DK75487D0 (en) | 1987-02-13 |
GB8603778D0 (en) | 1986-03-19 |
SE8700594D0 (en) | 1987-02-13 |
SE465926B (en) | 1991-11-18 |
GR870258B (en) | 1987-06-16 |
CH670084A5 (en) | 1989-05-12 |
ES2004879A6 (en) | 1989-02-16 |
SE8700594L (en) | 1987-08-16 |
DK75487A (en) | 1987-08-16 |
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