We have developed efficient catalytic methods for the stereoselective and diversity synthesis of various (E)-, (Z)-, and disubstituted 3-alkylideneoxindoles and 3-alkylidenebenzofuran-2-ones via palladium-catalyzed Heck/Suzuki−Miyaura, Heck/Heck, and Heck/carbonylation/Suzuki−Miyaura domino reactions.
Efficient methods for stereoselective synthesis of various (E)-, (Z)-, and disubstituted 3-alkylideneoxindoles were investigated using tandem In-mediated carbometalation and ligandless Pd-catalyzed coupling reaction.
A convenient synthesis of (E)-α-alkylidene-γ-lactams and (E)-3-alkylideneoxindoles by rhodium-catalyzed intramolecular hydroamidation
Rhodium-catalyzed carbonylative cyclization without carbon monoxide was investigated. Cyclization of various form-amides having alkynyl groups proceeded smoothly in the presence of Rh-4(CO)(12) to provide alpha-alkylidene-gamma-lactams or 3-alkylideneoxindoles in moderate to good yields with high (E)-selectivity. (c) 2005 Elsevier Ltd. All rights reserved.