Chiral sulfoxide controlled asymmetric additions to CN double bond. An efficient approach to stereochemically defined α-fluoroalkyl amino compounds
作者:Pierfrancesco Bravo、Maurizia Guidetti、Fiorenza Viani、Matteo Zanda、Andrey L. Markovsky、Alexander E. Sorochinsky、Irina V. Soloshonok、Vadim A. Soloshonok
DOI:10.1016/s0040-4020(98)00779-0
日期:1998.10
This paper presents a full account of studies into the asymmetric addition reactions between α-lithium derivatives of enantiomerically pure methyl and benzyl p-tolyl sulfoxides and the N-(p-methoxyphenyl)aldimines, bearing trifluoromethyl, pentafluoroethyl and ω-hydrotetrafluoroethyl groups, to afford the corresponding α-fluoroalkyl β-sulfinylamines, synthetically versatile precursors of a series of
本文全面研究了对映体纯的甲基和苄基对甲苯基亚砜的α-锂衍生物与N-(p的不对称加成反应带有三氟甲基,五氟乙基和ω-氢四氟乙基的-甲氧基苯基)醛亚胺,以提供相应的α-氟烷基β-亚磺胺,这是一系列对映异构纯的生物医学上重要的α-氟烷基烷基胺和α-氟烷基-β-羟基烷基胺的合成通用前体。发现加成反应在温和的条件下进行,从而可以以优异的产率和良好的对映体纯度方便地制备相应的α-氟烷基β-亚磺酰基胺。这些反应的立体化学结果显示受动力学控制,这与无氟亚胺的相应反应形成鲜明对比。加成产物的绝对构型表明起始亚胺上的氟代烷基起对映体定向的作用,