Enzymatic syntheses of chiral building blocks with trifluoromethyl or pentafluoroethyl groups
作者:Tomoya Kitazume、Nobuo Ishikawa
DOI:10.1016/s0022-1139(00)85108-8
日期:1985.9
A number of opticallyactive allylic alcohols with a trifluoromethyl or a pentafluoroethyl group were prepared by the biological reduction of the corresponding ketones with activefermenting baker's yeast.
通过用活性发酵面包酵母对相应的酮进行生物还原,可以制备出许多具有三氟甲基或五氟乙基的旋光烯丙基醇。
A Simple Stereoselective Route to α-Trifluoromethyl Analogues of Piperidine Alkaloids
An intramolecular Mannich-type reaction, involving either an α-trifluoromethyl-1,3-aminoketal or a fluoral synthetic equivalent, was employed to prepare diastereoselectively α-trifluoromethylpiperidines. This simple strategy allows a facile access to a wide range of new α-trifluoromethyl saturated N-heterocyclic compounds.
The asymmetric synthesis of trifluoromethyl-piperidine-based gamma-aminoacids and of indolizidines bearing a trifluoromethyl group is reported. These rarely described compounds are prepared in a highly enantio-enriched form employing as key step an intramolecular Mannich type process, involving an enantiopure Tfm-aminoketal and ethyl oxobutenoate as aldehyde partner. Used strategy together with obtained compounds allows the access to a wide range of Tfm-N-(poly)heterocycles, structures of obvious interest for the research of new bioactive drugs. (c) 2012 Elsevier B.V. All rights reserved.
1,1,1-Trifluoro-2-penten-4-one as a building block of trifluoromethyl-substituted compounds