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CN106478487B - Pyrrolidine compounds and synthesis method thereof - Google Patents

Pyrrolidine compounds and synthesis method thereof Download PDF

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Publication number
CN106478487B
CN106478487B CN201610831473.5A CN201610831473A CN106478487B CN 106478487 B CN106478487 B CN 106478487B CN 201610831473 A CN201610831473 A CN 201610831473A CN 106478487 B CN106478487 B CN 106478487B
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benzyl
reaction
cyclic imide
pyrrolidines
reflux
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CN106478487A (en
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张兆国
丁广妮
谢小敏
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Shanghai Jiao Tong University
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    • CCHEMISTRY; METALLURGY
    • C07ORGANIC CHEMISTRY
    • C07DHETEROCYCLIC COMPOUNDS
    • C07D209/00Heterocyclic compounds containing five-membered rings, condensed with other rings, with one nitrogen atom as the only ring hetero atom
    • C07D209/02Heterocyclic compounds containing five-membered rings, condensed with other rings, with one nitrogen atom as the only ring hetero atom condensed with one carbocyclic ring
    • C07D209/44Iso-indoles; Hydrogenated iso-indoles
    • CCHEMISTRY; METALLURGY
    • C07ORGANIC CHEMISTRY
    • C07DHETEROCYCLIC COMPOUNDS
    • C07D209/00Heterocyclic compounds containing five-membered rings, condensed with other rings, with one nitrogen atom as the only ring hetero atom
    • C07D209/56Ring systems containing three or more rings
    • C07D209/58[b]- or [c]-condensed
    • C07D209/62Naphtho [c] pyrroles; Hydrogenated naphtho [c] pyrroles
    • CCHEMISTRY; METALLURGY
    • C07ORGANIC CHEMISTRY
    • C07DHETEROCYCLIC COMPOUNDS
    • C07D209/00Heterocyclic compounds containing five-membered rings, condensed with other rings, with one nitrogen atom as the only ring hetero atom
    • C07D209/56Ring systems containing three or more rings
    • C07D209/58[b]- or [c]-condensed
    • C07D209/724,7-Endo-alkylene-iso-indoles
    • CCHEMISTRY; METALLURGY
    • C07ORGANIC CHEMISTRY
    • C07DHETEROCYCLIC COMPOUNDS
    • C07D295/00Heterocyclic compounds containing polymethylene-imine rings with at least five ring members, 3-azabicyclo [3.2.2] nonane, piperazine, morpholine or thiomorpholine rings, having only hydrogen atoms directly attached to the ring carbon atoms
    • C07D295/02Heterocyclic compounds containing polymethylene-imine rings with at least five ring members, 3-azabicyclo [3.2.2] nonane, piperazine, morpholine or thiomorpholine rings, having only hydrogen atoms directly attached to the ring carbon atoms containing only hydrogen and carbon atoms in addition to the ring hetero elements
    • C07D295/027Heterocyclic compounds containing polymethylene-imine rings with at least five ring members, 3-azabicyclo [3.2.2] nonane, piperazine, morpholine or thiomorpholine rings, having only hydrogen atoms directly attached to the ring carbon atoms containing only hydrogen and carbon atoms in addition to the ring hetero elements containing only one hetero ring
    • C07D295/03Heterocyclic compounds containing polymethylene-imine rings with at least five ring members, 3-azabicyclo [3.2.2] nonane, piperazine, morpholine or thiomorpholine rings, having only hydrogen atoms directly attached to the ring carbon atoms containing only hydrogen and carbon atoms in addition to the ring hetero elements containing only one hetero ring with the ring nitrogen atoms directly attached to acyclic carbon atoms
    • CCHEMISTRY; METALLURGY
    • C07ORGANIC CHEMISTRY
    • C07DHETEROCYCLIC COMPOUNDS
    • C07D471/00Heterocyclic compounds containing nitrogen atoms as the only ring hetero atoms in the condensed system, at least one ring being a six-membered ring with one nitrogen atom, not provided for by groups C07D451/00 - C07D463/00
    • C07D471/02Heterocyclic compounds containing nitrogen atoms as the only ring hetero atoms in the condensed system, at least one ring being a six-membered ring with one nitrogen atom, not provided for by groups C07D451/00 - C07D463/00 in which the condensed system contains two hetero rings
    • C07D471/04Ortho-condensed systems
    • CCHEMISTRY; METALLURGY
    • C07ORGANIC CHEMISTRY
    • C07DHETEROCYCLIC COMPOUNDS
    • C07D487/00Heterocyclic compounds containing nitrogen atoms as the only ring hetero atoms in the condensed system, not provided for by groups C07D451/00 - C07D477/00
    • C07D487/02Heterocyclic compounds containing nitrogen atoms as the only ring hetero atoms in the condensed system, not provided for by groups C07D451/00 - C07D477/00 in which the condensed system contains two hetero rings
    • C07D487/04Ortho-condensed systems

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  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Nitrogen Condensed Heterocyclic Rings (AREA)
  • Low-Molecular Organic Synthesis Reactions Using Catalysts (AREA)
  • Indole Compounds (AREA)

Abstract

一种吡咯烷类化合物及其合成方法,将溶解于有机溶剂中的环状酰亚胺类化合物与作为还原剂的硅氢试剂和作为催化剂的路易斯酸混合,在回流的条件下制备得到芳香环以及脂肪环吡咯烷类化合物。本发明合成路线简洁,高效和经济,条件温和,适用性广,对吡咯烷类化合物的后期工业化生产将起到极大的推动作用。A pyrrolidine compound and a method for synthesizing the same. The cyclic imide compound dissolved in an organic solvent is mixed with a silicon hydrogen reagent as a reducing agent and a Lewis acid as a catalyst, and an aromatic ring is prepared under reflux conditions. and alicyclic pyrrolidine compounds. The synthetic route of the invention is simple, efficient and economical, the conditions are mild, and the applicability is wide, which will greatly promote the later-stage industrial production of the pyrrolidine compounds.

Description

Pyrrolidines and its synthetic method
Technical field
The present invention relates to a kind of technology of chemical field, specifically a kind of Louis acid catalysis cyclic imide class The silicon hydrogenation for closing object prepares the synthetic method of pyrrolidines.
Background technique
Pyrrolidines are one of heterocyclic compound important kinds, are prevalent in some natural products, medicine Object intermediate, drug molecule, in functional material, thus the synthesis of pyrrolidines have in terms of organic synthesis it is important Meaning.
It is most straightforward approach by restoring imide analog compounds come synthesis of pyrrolidine class compound, prepares pyrroles at present The classical restoring method of alkyl compound is to use the compounds such as Lithium Aluminium Hydride, borine as reducing agent to realize.Due to acyl There are multiple intermediates for the reduction of imine compound, and the formation of by-product, and this kind of reduction are caused using this kind of reducing agent The functional group compatibility of reagent is poor.Simultaneously because the activity of reducing agent is higher, the disadvantages of to water sensitive, need the reaction usually It is strict controlled in the environment of anhydrous and low temperature and carries out, and the post-processing step reacted is comparatively laborious.
Summary of the invention
The present invention In view of the above shortcomings of the prior art, proposes a kind of pyrrolidines and its synthetic method, It is reducing agent, boron-containing compound as catalyst using the silicon hydrogen species compound of cheap and simple from imide analog compounds Catalyzed hydrosilation restores cyclic imide class compound and realizes that synthetic route is succinct, mild condition, is suitable for large scale quantities It produces.
The present invention is achieved by the following technical solutions:
The present invention relates to a kind of pyrrolidines, structural formulas are as follows:Or Wherein:
R1For benzyl containing different substituents, alkane, alkene, alkynyl, aryl or contain all kinds of functional groups (cyano, halogen, carbonyl Base, alkoxy, amino, hydroxyl) alkyl chain;
R2For halogen, alkoxy, carbonyl, naphthalene nucleus, amino or protection amino;
R3For benzyl containing different substituents, alkane, alkene, alkynyl, aryl or contain all kinds of functional groups (cyano, halogen, carbonyl Base, alkoxy, amino, hydroxyl) alkyl chain;
R4For hydrogen, cycloalkane, norbornane, norbornene or hexahydropyridine.
The present invention relates to the synthetic method of above-mentioned pyrrolidines, the cyclic imide that will be dissolved in organic solvent Class compound is mixed with the silicon hydrogen reagent as reducing agent and the lewis acid as catalyst, is prepared under conditions of reflux It is as follows to aromatic rings and cycloaliphatic ring pyrrolidines, reaction equation:
The lewis acid is further preferred are as follows: three-(pentafluorophenyl group) boron, phenyl boric acid, substituted phenyl boric acid or trifluoro Change borate ether etc..
The reducing agent is more preferably three silicon hydrogen of aryl, three silicon hydrogen of alkyl, diaryl silicon hydrogen, dialkyl group silicon hydrogen, 1,1,3,3- tetramethyl disiloxane, PMHS (containing hydrogen silicone oil) or triaryl silicon hydrogen etc..
The organic solvent is toluene, 1,4- dioxane, 1,2- dichloroethanes or chloroform.
The reaction molar ratio of the amount of hydrogen is 1/6-1/4, catalysis in the cyclic imide class compound and silicon hydrogen reagent The dosage of agent is the 0.1-2.0mol% of cyclic imide.
The reflux refers to that water is added after the reaction was completed and quenches remaining silicon hydrogen examination for the back flow reaction under 110 DEG C of environment Agent is concentrated after extracting organic layer, and direct column chromatographs to obtain target product.
The present invention relates to the applications for the pyrrolidines that the above method is prepared, will be in pyrrolidines Manufacture of at least one compound for the important segment of Moxifloxacin, Mitiglinide Calcium and procyclidine etc..
Technical effect
Compared with prior art, the present invention with " highly selective " for background, using mild cheap reducing agent silicon hydrogen reagent, In the presence of a lewis acid catalyst, preferably using common toluene as solvent, various substituted pyrroles are prepared in the case where reflux Cough up alkyl compound.Compared to existing preparation process, reducing agent used in the present invention is easy to operate, and highly selective, substrate is suitable Wide, the high income with property.
Specific embodiment
Embodiment 1
The present embodiment is related to N- benzyl isoindolineSynthesis, the specific steps of which are as follows:
It is added in reaction tube N- benzylphthalimide (237.3mg, 1.0mmol), B (C6F5)3(10.2mg, 2.0mol%), silicon hydrogen reagent TMDS (335.8mg, 2.5mmol) slowly is added in system after toluene (2mL) stirring and dissolving, it will Reaction temperature rises to 110 DEG C of reflux.It has reacted and the remaining silicon hydrogen reagent of water quenching is added, be concentrated after extracting organic layer, direct column Chromatography obtains target product, yield: 95%.1H NMR(400MHz,CDCl3)δ7.44–7.42(m,2H),7.38–7.34(m, 2H),7.31–7.26(m,1H),7.18(s,4H),3.94(s,4H),3.92(s,2H).13C NMR(100MHz,CDCl3)δ 140.3,139.2,128.89,128.5,127.2,126.7,122.4,60.4,59.0.
Embodiment 2
The present embodiment is related to N- ((4- trifluoromethyl) benzyl) isoindolineSynthesis, tool Steps are as follows for body:
According to operation same as Example 1, target compound is obtained, yield: 90%.1H NMR(400MHz,CDCl3)δ 7.62–7.60(m,2H),7.55–7.53(m,2H),7.20(s,4H),3.97(s,2H),3.94(s,4H).13C NMR (100MHz,CDCl3) δ 143.5,140.1,129.5 (q, J=32.1Hz), 129.0,126.9,125.5 (q, J=3.7Hz), 124.4 (q, J=270.1Hz), 122.5,59.9,59.1.
Embodiment 3
The present embodiment is related to 2,6- dibenzyl -1,2,3,5,6,7- hexahydrobenzene parallel connection pyrroles Synthesis, the specific steps of which are as follows:
According to operation same as Example 1, target compound is obtained, yield: 90%.1H NMR(400MHz,CDCl3)δ 7.41–7.39(m,4H),7.36–7.32(m,4H),7.29–7.27(m,2H),6.97(s,2H),3.89(s,4H),3.87(s, 8H).13C NMR(100MHz,CDCl3)δ139.2,139.0,128.9,128.5,127.2,116.5,60.5,58.9.
Embodiment 4
The present embodiment is related to N- benzyl -2,3- dihydro-benzisoindolineSynthesis, tool Steps are as follows for body:
According to operation same as Example 1, target compound is obtained, yield: 89%.1H NMR(400MHz,CDCl3)δ 7.81–7.79(m,2H),7.63(s,2H),7.49–7.39(m,6H),7.35–7.32(m,1H),4.06(s,4H),3.97(s, 2H).13C NMR(100MHz,CDCl3)δ139.4,139.1,133.1,129.0,128.5,127.8,127.3,125.4, 120.6,60.6,58.7.
Embodiment 5
The present embodiment is related to N- benzyl -4,7- endo-methylene group-hexahydroisoindolineSynthesis, tool Steps are as follows for body:
According to operation same as Example 1, target compound is obtained, yield: 94%.1H NMR(400MHz,CDCl3)δ 7.36-7.28 (m, 4H), 7.24-7.21 (m, 1H), 3.52 (s, 2H), 2.76 (d, J=10.0Hz, 2H), 2.35-2.34 (m, 2H),2.11(s,2H),2.02–1.98(m,2H),1.77–1.75(m,2H),1.41–1.33(m,2H),1.26–1.24(m, 2H).13C NMR(100MHz,CDCl3)δ140.5,128.5,128.2,126.7,60.7,55.4,44.1,42.3,41.4, 24.1.
Embodiment 6
The present embodiment is related to N- benzyl hexahydroisoindolineSynthesis, the specific steps of which are as follows:
According to operation same as Example 1, target compound is obtained, yield: 90%.1H NMR(400MHz,CDCl3)δ 7.38–7.32(m,4H),7.29–7.24(m,1H),3.76(s,2H),2.83–2.79(m,2H),2.57–2.53(m,2H), 2.21–2.15(m,2H),1.60–1.46(m,6H),1.38–1.30(m,2H).13C NMR(100MHz,CDCl3)δ139.9, 128.8,128.3,126.9,61.4,58.4,37.3,27.0,23.0.
Embodiment 7
The present embodiment is related to N- benzyl-pyrrole alkaneSynthesis, the specific steps of which are as follows:
According to operation same as Example 1, target compound is obtained, yield: 82%.1H NMR(400MHz,CDCl3)δ 7.35–7.23(m,5H),3.65(s,2H),2.55–2.53(m,4H),1.82–1.78(m,4H).13C NMR(100MHz, CDCl3)δ139.2,129.0,128.3,127.0,60.8,54.2,23.5.
Embodiment 8
The present embodiment is related to 6- benzyl octahydro pyrrolo- [3,4-B] pyridineSynthesis, it is specific Steps are as follows:
According to operation same as Example 1, target compound is obtained, yield: 85%.1H NMR(400MHz,CDCl3)δ 7.34–7.29(m,4H),7.27–7.22(m,1H),3.82–3.69(m,2H),3.28–3.26(m,1H),3.04–3.00(m, 1H),2.87–2.84(m,1H),2.80–2.75(m,1H),2.71–2.55(m,3H),2.29–2.21(m,1H),1.69–1.64 (m,2H),1.52–1.43(m,2H).13C NMR(100MHz,CDCl3)δ139.0,128.7,128.2,126.9,60.5, 59.8,56.1,55.0,43.8,36.2,23.9,21.4.
Above-mentioned specific implementation can by those skilled in the art under the premise of without departing substantially from the principle of the invention and objective with difference Mode carry out local directed complete set to it, protection scope of the present invention is subject to claims and not by above-mentioned specific implementation institute Limit, each implementation within its scope is by the constraint of the present invention.

Claims (1)

1.一种吡咯烷类化合物的合成方法,其特征在于,该吡咯烷类化合物的结构式包括:1. a synthetic method of pyrrolidines, is characterized in that, the structural formula of this pyrrolidines comprises: N-苄基异吲哚啉 N-Benzylisoindoline N-((4-三氟甲基)苄基)异吲哚啉 N-((4-Trifluoromethyl)benzyl)isoindoline 2,6-二苄基-1,2,3,5,6,7-六氢苯并联吡咯 2,6-Dibenzyl-1,2,3,5,6,7-Hexahydrophenylparapyrrole N-苄基-2,3-二氢-苯并异吲哚 N-Benzyl-2,3-dihydro-benzisoindole N-苄基-4,7-桥亚甲基-全氢异吲哚 N-benzyl-4,7-methylene-perhydroisoindole N-苄基全氢异吲哚 N-Benzylperhydroisoindole N-苄基吡咯烷N-Benzylpyrrolidine or 6-苄基八氢吡咯并[3,4-B]吡啶 6-Benzyloctahydropyrrolo[3,4-B]pyridine 所述的合成方法,将溶解于甲苯中的环状酰亚胺类化合物与作为还原剂的1,1,3,3-四甲基二硅氧烷和作为催化剂的B(C6F5)3混合,在回流的条件下制备得到芳香环以及脂肪环吡咯烷类化合物,其反应式为:Said synthesis method comprises cyclic imide compounds dissolved in toluene, 1,1,3,3-tetramethyldisiloxane as reducing agent and B(C 6 F 5 ) as catalyst 3 mix, prepare aromatic ring and alicyclic pyrrolidine compounds under the condition of reflux, and its reaction formula is: 所述的环状酰亚胺类化合物和1,1,3,3-四甲基二硅氧烷中氢的量的反应摩尔比为1/6-1/4;The reaction molar ratio of the amount of hydrogen in the cyclic imide compound and 1,1,3,3-tetramethyldisiloxane is 1/6-1/4; 所述的B(C6F5)3的用量为环状酰亚胺的0.1-2.0mol%;The amount of the B(C 6 F 5 ) 3 is 0.1-2.0 mol% of the cyclic imide; 所述的回流是指,在110℃环境下回流反应,反应完成后加入水猝灭剩余的1,1,3,3-四甲基二硅氧烷,萃取有机层后浓缩,直接柱层析得到目标产物。The reflux refers to the reflux reaction at 110°C. After the reaction is completed, water is added to quench the remaining 1,1,3,3-tetramethyldisiloxane, and the organic layer is extracted and concentrated, and then directly column chromatography. obtain the target product.
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CN118459391A (en) * 2024-05-11 2024-08-09 上海予君生物科技发展有限公司 A preparation method of hexahydroisoindole compound

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