An efficient, regiocontrolled synthesis of 5-aryl-2-carbethoxypyrroles from 3-aryl-3-chloropropeniminium salts
作者:John T. Gupton、Dale A. Krolikowski、Richard H. Yu、Vu Phong、James A. Sikorski、Maria L. Dahl、Claude R. Jones
DOI:10.1021/jo00046a033
日期:1992.9
A variety of 3-aryl-3-chloropropeniminium salts react with alpha-amino acid esters under basic conditions to produce 2-carbethoxy-5-arylpyrroles in a regioselective manner. The overall process represents a short, efficient, and convergent synthesis of 2,5-disubstituted pyrroles, and azomethine ylides or azapentadienyl anions may be involved as intermediates.