2-Ethynylaziridines as Chiral Carbon Nucleophiles: Stereoselective Synthesis of 1,3-Amino Alcohols with Three Stereocenters via Allenylindium Reagents Bearing a Protected Amino Group
作者:Hiroaki Ohno、Hisao Hamaguchi、Tetsuaki Tanaka
DOI:10.1021/jo005756v
日期:2001.3.1
H(2)O. Stereoselective addition of the allenylindium to aliphatic or aromatic aldehydes affords 1,3-amino alcohols bearing three contiguous chiral centers: while 2,3-trans-2-ethynylaziridines yield syn,syn-2-ethynyl-1,3-amino alcohols predominantly, 2,3-cis-aziridines give anti,syn isomers selectively. Synthesis of highly substituted ethynylazetidines is also described.
通过在Pd(PPh(3))(4)和H(2)O存在下用InI处理N-保护的3-烷基-2-乙炔基氮丙啶,可以有效地制备带有保护氨基的烯丙基铟试剂。将烯丙基铟立体选择性地加成到脂肪族或芳香族醛上,可得到带有三个连续手性中心的1,3-氨基醇:而2,3-反式-2-乙炔基氮丙啶主要产生syn,syn-2-ethynyl-1,3-氨基醇, 2,3-顺-氮丙啶类化合物选择性地产生抗,syn异构体。还描述了高度取代的乙炔基氮杂环丁烷的合成。