Pd(II)–Cu(II)-CATALYZED SYNTHESIS OF MONO- AND DIALKENYL-SUBSTITUTED FIVE-MEMBERED AROMATIC HETEROCYCLES

Abstract
The Pd-catalyzed one-step alkenylation method of five-membered aromatic heterocycles such as furan or thiophene with olefins has been found. The reaction proceeds regioselectively occurring at the 2-position of the heterocycles and the products have trans-stereochemistry when the substituents on the olefin is bulky.