An Improved Catalytic System, Pd(PPh<sub>3</sub>)<sub>4</sub>/PhCOOH Combined Catalyst, for the Allylation of Carbon Pronucleophiles with Allenes
作者:Yoshinori Yamamoto、Nitin T. Patil、Nirmal K. Pahadi
DOI:10.1055/s-2004-829178
日期:——
The reaction of allenes with active methynes and methylenes proceeded smoothly in the presence of Pd(PPh3)4/PhCOOH combined catalyst to give the corresponding monoallylated products with E-stereoselectivity in good to high yields. This result is in marked contrast to the previous finding that the reaction of allenes with active methynes, in the presence of Pd2(dba)3·CHCl3/dppb catalyst, affords the allylation products in lower yield with lower stereoselectivities.