Diastereoselective synthesis of a resolved secondary arsine complex: asymmetric synthesis of (R-(−)589-ethylmethylphenylarsine
作者:Geoffrey Salem、S.Bruce Wild
DOI:10.1016/0022-328x(89)87272-9
日期:1989.7
diastereomerically pure tertiary arsenido-iron complex [R-[(R★),(R★,R★)]]-[((η5-C5H5)1,2-C6H4(PMePh)2}FeAsMePh] · thf, from which optically pure [R-[(S★),(R★,R★)]]-(+)589-[(η5-C5H5)1,2-C6H4(PMePh)2}Fe(AsEtMePh)PF6 is obtained by reaction with iodoethane. Cyanide displaces (R)-(−)589-ethylmethylphenylarsine from the iron complex, thereby effecting the asymmetric synthesis of a tertiary arsine, chiral at arsenic
的反应〔- [R - (- [R ★, - [R ★)〕 - (+)589 - [(η 5 -C 5 H ^ 5)1,2-C 6 H ^ 4(PMePh)2 }的Fe(NCMe)] PF 6与(±)-AsHMePh在沸腾的甲醇的产率结晶[ [R - [([R ★) - (- [R ★,- [R ★)〕 - (+)589) - [(η 5 -C 5 H ^ 5)1,2 -C 6 H 4(PMePh)2 } Fe(AsHMePH) PF6,光学纯,约。在典型的二阶不对称转换中,产率为90%。该复合物包含第一个分解的次a。二次胂配合物与甲部的去质子化吨在-65℃下使对映异构纯的叔arsenido -铁复合物[ - [R - [([R ★),(- [R ★,- [R ★)〕〕 - [((η 5 -C 5 H 5)1,2-C 6 H 4(PMePh)2 } FeAsMePh]·thf,由此得到光学纯的[