The reaction of cyclic imines with the Ruppert–Prakash reagent. Facile approach to α-trifluoromethylated nornicotine, anabazine, and homoanabazine
摘要:
We have demonstrated that the Ruppert-Prakash reagent is able to react with a number of cyclic imines under acidic condition to afford the corresponding alpha-trifluoromethyl derivatives of nitrogen heterocycles. 5-7-Membered cyclic imines bearing various alkyl, aryl or heterocyclic group were successfully involved in this transformation. Novel trifluoromethylated analogues of nicotine, anabasine, and homoanabasine alkaloids were synthesized. (C) 2010 Elsevier Ltd. All rights reserved.
New method of preparation of C2F5Li and its reactions with cyclic imines and lactims: Synthesis of α-pentafluoroethyl proline
作者:Nikolay E. Shevchenko、Valentine G. Nenajdenko、Gerd-Volker Röschenthaler
DOI:10.1016/j.jfluchem.2008.01.013
日期:2008.5
Addition of pentafluoroethyllithium to cyclic imines leads to pentafluoroethyl substituted pyrrolidines, piperidines and azepanes while reaction of cyclic lactims gives rise to 2-pentafluoroethyl imines. Oxidative cleavage of 2-furyl-2-pentafluoroethyl pyrrolidine has been found to be an effective method for the preparation of a racemic α-pentafluoroethyl proline.
A Hofmann Rearrangement-Ring Expansion Cascade for the Synthesis of 1-Pyrrolines: Application to the Synthesis of 2,3-Dihydro-1<i>H</i>-pyrrolo[2,1-<i>a</i>]isoquinolinium Salts
cyclobutanecarboxamide with bis(trifluoroacetoxy)iodobenzene, PhI(OCOCF3)2, resulted in the formation of 1‐pyrroline via Hofmann rearrangement of the former followed by in situ ring expansion reaction of the cyclobutylamine intermediate. Further elaboration of this methodology to the synthesis of 2,3‐dihydro‐1H‐pyrrolo[2,1‐a]isoquinolinium salts has also been described.
用双(三氟乙酰氧基)碘苯PhI(OCOCF 3)2处理环丁烷甲酰胺,导致前者的霍夫曼重排形成1-吡咯啉,然后环丁胺中间体进行原位环扩环反应。还描述了该方法对2,3-二氢-1 H-吡咯并[2,1- a ]异喹啉鎓盐的合成的进一步阐述。
Alpha-amino-indole-3-acetic acids useful as anti-diabetic, anti-obesity and anti-atherosclerotic agents
申请人:THE UPJOHN COMPANY
公开号:EP0375133A1
公开(公告)日:1990-06-27
Provided are novel α-aminoindole-3-acetic acid derivatives having the formula
wherein R through R9 are the same as in Claim 1; and pharmacologically acceptable salts of compounds wherein R₉ is not OM, which are useful as anti-diabetic, anti-obesity and anti-atherosclerotic agents.
本发明提供了新型α-氨基吲哚-3-乙酸衍生物,其式为
其中 R 至 R9 与权利要求 1 中的相同;以及其中 R𠢙 不为 OM 的化合物的药理学上可接受的盐,可用作抗糖尿病、抗肥胖和抗动脉粥样硬化药物。
US5245046A
申请人:——
公开号:US5245046A
公开(公告)日:1993-09-14
[EN] ALPHA-AMINO-INDOLE-3-ACETIC ACIDS USEFUL AS ANTI-DIABETIC, ANTI-OBESITY AND ANTI-ATHEROSCLEROTIC AGENTS
申请人:THE UPJOHN COMPANY
公开号:WO1990005721A1
公开(公告)日:1990-05-31
(EN) Provided are novel $g(a)-aminoindole-3-acetic acid derivatives having formula (I), wherein R through R9 are the same as in Claim 1; and pharmacologically acceptable salts of compounds wherein R9 is not OM, which are useful as anti-diabetic, anti-obesity and anti-atherosclerotic agents.(FR) L'invention concerne de nouveaux dérivés de l'acide $g(a)-aminoindole-3-acétique ayant la formule (I), dans laquelle R jusqu'à R9 sont définis dans la revendication 1; ainsi que des sels pharmacologiquement acceptables de composés dans lesquels R9 n'est pas OM, et sont utiles comme agents anti-diabétiques, anti-obésité et anti-athéro-sclérotiques.