Pd2+ and Cu2+ catalyzed oxidative cross-coupling of mercaptoacetylenes and arylboronic acids
作者:Adam Henke、Jiri Srogl
DOI:10.1039/c1cc10505a
日期:——
An oxidative thiolate scavenging concept in a metal catalyzed reaction is presented and demonstrated on the aerobic Pd and Cu catalyzed cross-coupling of mercaptoacetylenes with arylboronic acids. Synthetic value of the chemistry as the complementary tool to the Sonogashira protocol has been demonstrated on a series of functionalized mercaptoacetylene substrates.
The selective formation of α-fluoro,β-phthalimido ketones, α,α-difluoro, β-phthalimido ketones or β-phthalimido α-diketones is described by means of gold-catalyzed oxyfluorination/oxydifluorination or dioxygenation reactions. The simultaneous assembly of the quinoxaline nucleus and the removal of the phthalimido-protecting group were also performed.