Titanium(IV) isopropoxide and ethylmagnesium bromide catalyzed reaction of 2-alkynylamines with Et2Zn, followed by deuterolysis/hydrolysis and iodinolysis, affords substituted (Z)-pent-2-en-2,5-d 2-1-amines, (Z)-pent-2-en-1-amines (65–88%), and substituted (Z)-2,5-diiodopent-2-en-1-amines (55–63%). It is suggested that the reaction proceeds through the formation of cyclic organotitanium derivatives. The
<i>Cis</i>-Carbocupration of Acetylenic Phosphine Oxides and Its Application in the Stereoselective Synthesis of Polysubstituted Vinyl Phosphine Oxides
作者:Xian Huang、Zhimeng Wu
DOI:10.1055/s-2004-831222
日期:——
Bisubstituted or 1,2,2-trisubstituted vinyl phosphine oxides were prepared stereoselectively by the carbocupration of acetylenicphosphine oxides followed by hydrolysis or by reacting with other electrophiles.