Asymmetric Synthesis of Piperidines and Octahydroindolizines
摘要:
The conjugate addition of a homochiral lithium amide to a xi-hydroxy-alpha,beta-unsaturated ester, followed by a one-pot, ring-closure-N-debenzylation protocol has been used in the asymmetric syntheses of (S)-coniine and (R)-delta-coniceine (isolated as the corresponding hydrochloride salts) and the bicyclic core of stellettamide A.