The first catalytic, enantioselectivevinylogousMannichreaction of acyclic silyl dienolates is reported. A second‐generation 2,2′‐dihydroxy‐1,1′‐binaphthyl (BINOL)‐based phosphoric acid has been developed and further optimized as an enantioselective organocatalyst. Upon protonation of the imines, chiral contact ion pairs are generated in situ and attacked highly diastereoselectively by the nucleophile
Enantioselective Formal Syntheses of 11 Nuphar Alkaloids and Discovery of Potent Apoptotic Monomeric Analogues
作者:Hui Li、Alexander Korotkov、Charles W. Chapman、Alan Eastman、Jimmy Wu
DOI:10.1002/anie.201600106
日期:2016.3.1
alkaloids were achieved, along with the construction of a stereochemically diverse collection of the first known monomeric analogues having apoptotic activity. The syntheses involved the development of highly enantioselective Brønsted acid catalyzed vinylogous Mukaiyama–Mannich reactions, which feature the unprecedented use of a supersilyl group to control the regio‐, enantio‐ and diastereoselectivity. Biological