Nucleophilic addition of methyllithium to chiral oxime ethers: asymmetric preparation of 1-(aryl)ethylamines and application to a synthesis of calcimimetics (+)-NPS R-568 and its thio analogue
作者:Naoki Yamazaki、Masakazu Atobe、Chihiro Kibayashi
DOI:10.1016/s0040-4039(01)00910-8
日期:2001.7
Chiral (E)-arylaldehyde oxime ethers, prepared using (R)-1-phenyl-1,2-ethanediol as a chiral auxiliary, undergo nucleophilic addition with methyllithium to give diastereomerically enriched O-alkyl hydroxylamines which, after reductive NO bond cleavage, lead to the corresponding (R)-1-(aryl)ethylamines. This methodology has been applied to the enantioselective synthesis of a new type of arylalkylamine
使用(R)-1-苯基-1,2-乙二醇作为手性助剂制备的手性(E)-芳醛肟肟醚与甲基锂进行亲核加成反应,生成非对映体富集的O-烷基羟胺,在还原N = O键后裂解,得到相应的(R)-1-(芳基)乙胺。该方法已经应用于新型芳基烷基胺拟钙剂(R)-(+)-NPS R-568及其硫代类似物的对映选择性合成。