The reaction of nitrones with (R)-(+)-methyl p-tolyl sulfoxide anion; asymmetric synthesis of optically active secondary amines
作者:Shun-Ichi Murahashi、Jun Sun、Tomoyasu Tsuda
DOI:10.1016/s0040-4039(00)77646-5
日期:1993.4
α-substituted N-hydroxylamines have been prepared by the addition of (R)-(+)-and (S)-(−)-methyl p-tolyl sulfoxide anions to nitrones highly efficiently. This method is applicable to the synthesis of optically active N-hydroxy tetrahydroisoquinoline derivatives 6a–6e, which are important precursors of various isoquinoline alkaloids such as (R)-(+)-salsolidine. (8). Furthermore, the reaction of nitrones bearing
通过高效地将(R)-(+)-和(S)-(-)-甲基对甲苯基亚砜阴离子添加到硝酮中,制备了旋光性α-取代的N-羟胺。该方法适用于旋光性N-羟基四氢异喹啉衍生物6a-6e的合成,这些衍生物是各种异喹啉生物碱如(R)-(+)-柳丁碱的重要前体。(8)。此外,带有手性亚磺酰基的硝酮与有机金属试剂的反应提供了一种有效的方法,用于将不对称季碳α诱导为仲胺的氮。