Reaction of PhSeCl or PhSCl with 2,3-Allenoic Acids: An Efficient Synthesis of β-Organoselenium or β-Organosulfur Substituted Butenolides
作者:Shengming Ma、Feng Pan、Xueshi Hao、Xian Huang
DOI:10.1055/s-2003-43377
日期:——
β-Organoselenium or β-organosulfur-substituted butenolides were prepared via the electrophilic cyclization of 2,3-allenoic acids with PhSeCl or PhSCl.
Studies on electrophilic addition reaction of 2,3-allenoates with PhSeCl
作者:Guofei Chen、Chunling Fu、Shengming Ma
DOI:10.1016/j.tet.2006.02.053
日期:2006.5
butenolides were prepared from 2,3-allenoates and PhSeCl in the presence of water. The yields of the products depend largely on the structures of 2,3-allenoates. The addition of water is crucial for some of this electrophilic cyclization. The reaction of simple unsubstituted methyl 2,3-butadienoate afforded methyl 4-chloro-3-phenylselanylbut-2(Z)-enoate in good yield and stereoselectivity.