作者:Hiroaki Ohno、Ayako Toda、Yoshiji Takemoto、Nobutaka Fujii、Toshiro Ibuka
DOI:10.1039/a905027b
日期:——
Two convenient methods for the synthesis of chiral 2-ethynylaziridines from natural α-amino acids are described. Sodium hydride-promoted aziridination of mesylates of 4-arylsulfonylamino-2-bromoalk-2-en-1-ols yields trans-2-(1-bromovinyl)aziridines in a highly stereoselective manner, and subsequent dehydrobromination of the aziridines by potassium tert-butoxide gives separable stereoisomeric mixtures
描述了两种从天然α-氨基酸合成手性2-乙炔基氮丙啶的简便方法。氢化钠促进的4-芳基磺酰基氨基-2-溴代烷-2-烯-1-醇甲磺酸酯的叠氮基化反应以高度立体选择性的方式产生反式-2-(1-溴乙烯基)氮丙啶,随后通过叔碳酸钾对氮丙啶进行脱氢溴化反应丁醇钾给出的可分离立体异构体混合物的反式-和顺-2- ethynylaziridines在对映体纯形式的(> 98%ee)的。还介绍了在Mitsunobu条件下由带有乙炔基的手性氨基醇简单合成具有高光学纯度(91-98%ee)的2-乙炔基氮丙啶。