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
An oxidation catalyst for use in the oxidation of a substrate with a molecular oxygen, comprising at least one member selected from the group consisting of a specific hydrazyl radical (such as 2,2-diphenyl-1-picrylhydrazyl) and a specific hydrazine compound (such as 2,2-diphenyl-1-picrylhydrazine). A method for producing a chemical compound, comprising contacting a substrate with a molecular oxygen in the presence of the above-mentioned oxidation catalyst.