Chemodiversity in the Palladium-Catalyzed Cyclizations of Allenynecarboxylates
作者:Chang Ho Oh、Dai In Park、Seung Hyun Jung、V. Raghava Reddy、Arun Kumar Gupta、Yeong Mi Kim
DOI:10.1055/s-2005-871958
日期:——
Pd-catalyzed cyclizations of 1,n-allenynecarboxylates have been found to exhibit three different cyclization modes: cycloreduction, arylative cyclization, and [2+2] cycloaddition depending on the reaction conditions.
Unprecedented carbocyclization of 1,6-allenynes on addition of organoboronic acids under Pd-catalysis
作者:Arun Kumar Gupta、Chul Yun Rhim、Chang Ho Oh
DOI:10.1016/j.tetlet.2005.02.020
日期:2005.3
In contrast to the ene behavior of allenes in Pauson-Khand reactions and other cyclization reactions, 1,6-allenynes undergo unprecedented carbocyclization followed by regioselective addition of organoboronic acids in the presence of Pd(OAc)(2) and tri-t-butyl phosphine under mild reaction conditions. (c) 2005 Elsevier Ltd. All rights reserved.