Selenium dioxide catalyzed oxidation of secondary amines with hydrogen peroxide. Simple synthesis of nitrones from secondary amines
作者:Shun-Ichi Murahashi、Tatsuki Shiota
DOI:10.1016/s0040-4039(00)96130-6
日期:——
Oxidation of secondary amines with hydrogen peroxide in the presence of selenium dioxide catalyst at room temperature gives nitrones, which are versatile synthetic intermediates, highly efficiently.
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 isoquinolinealkaloids such as (R)-(+)-salsolidine. (8). Furthermore, the reaction of nitrones bearing