Palladium-Catalyzed Synthesis of 1,3-Dienes from Allenes and Organic Halides
作者:Hao-Ming Chang、Chien-Hong Cheng
DOI:10.1021/jo991651k
日期:2000.3.1
with aryl and vinylic halides to give diene products (3p-w). For 2d, both E and Z isomers 3t and 3u of the diene product were observed. For 2e, two regioisomers 3vand 3w were isolated with 3w likely from alkene isomerization of 3v. Various palladium systems were tested for the catalytic activity of diene formation. In addition to Pd(dba)(2)/PPh(3), Pd(OAc)(2)/PPh(3), PdCl(2)(PPh(3))(2), and PdCl(2)(dppe)