Efficient synthesis of enantiomerically pure trans-2,5-bis(arylethynyl)pyrrolidines. A new entry into C2-symmetric chiral secondary amines
作者:Takeshi Hanamoto、Nami Shimomoto、Takashi Kikukawa、Junji Inanaga
DOI:10.1016/s0957-4166(99)00303-1
日期:1999.7
A new class of C2-symmetric pyrrolidine derivatives bearing arylethynyl groups at the 2,5-positions has been synthesized in enantiomerically pure form from 1,7-octadiyne-3,6-diol in five steps. Some notable features of the synthesis are: (i) the formation of a separable diastereomeric mixture of pyrrolidine carbamates using a newly prepared chiral chloroformate; and (ii) the development of a new method
在五个步骤中,由1,7-辛二炔-3,6-二醇以对映体纯的形式合成了一类新的在2,5-位带有芳乙炔基的C 2对称吡咯烷衍生物。合成的一些显着特征是:(i)使用新制备的手性氯甲酸酯形成可分离的吡咯烷氨基甲酸酯的非对映异构混合物;(ii)开发了通过新颖的SmI 2促进的电子转移过程使氨基甲酸酯去保护的新方法。