Decarboxylative cyclization of allylic cyclic carbamates: applications to the total synthesis of (-)-codonopsine
摘要:
Decarboxylative cyclization of allylic cyclic carbamates 1 leading to 2-substituted DELTA-3-piperidines and -pyrrolidines, as well as its application to the total synthesis of (-)-codonopsine, is described.
Selective carbon-carbon bond formation via transition-metal catalysis. 33. Palladium-catalyzed cross-coupling reaction of .alpha.-heterosubstituted alkenylmetals. A stereoselective route to heterosubstituted dienes suitable for the Diels-Alder reaction