palladium(0)-catalyzed, Cu(I)-mediated synthetic route to trisubstituted olefins and conjugate dienes has been developed via oxo directing Liebeskind–Srogl cross-coupling reactions of gem-dihaloolefin-type α-oxo ketene dithioacetals with aryl and alkenylboronic acids. The synthetic protocol has demonstrated rare examples of transition-metal-promoted transformations of ketene dithioacetals, providing a novel route to
The Substitution Reaction of 2-Aralkylthio-1-alkenyl and 2-Alkylsulfinyl-1-alkenyl Ketones with Alkoxides: Preparation of 2-Alkoxy-1-alkenyl Ketones
作者:Takehiko Nishio、Yoshimori Omote
DOI:10.1055/s-1980-29303
日期:——
Regioselective synthesis of multisubstituted pyrazoles via cyclocondensation of β-thioalkyl-α,β-unsaturated ketones with hydrazines
作者:Weiwei Jin、Haifeng Yu、Zhengkun Yu
DOI:10.1016/j.tetlet.2011.08.168
日期:2011.11
Multisubstituted pyrazoles were efficiently synthesized by cyclocondensation of beta-thioalkyl-alpha,beta-unsaturated ketones with hydrazines under relatively mild conditions. A one-pot synthetic protocol through tandem Liebeskind-Srogl cross-coupling/cyclocondensation using alpha-oxo ketene dithioacetals as the starting materials was also realized for the same purpose. (C) 2011 Elsevier Ltd. All rights reserved.