Total Synthesis of (−)-Hippodamine by Stereocontrolled Construction of Azaphenalene Skeleton Based on Extended One-Pot Asymmetric Azaelectrocyclization
摘要:
The first asymmetric total synthesis of (-)-hippodamine has been accomplished via the concise construction of its azaphenalene core, which Is featured by the 2,4,6-chiral piperidine synthesis based on one-pot asymmetric azaelectrocyclization in the partially activated substituent system and the subsequent intramolecular Mannich reaction.
Asymmetric Intramolecular Aza-Michael Reaction in Desymmetrization Processes. Total Synthesis of Hippodamine and <i>epi</i>-Hippodamine
作者:Marta Guerola、María Sánchez-Roselló、Cristina Mulet、Carlos del Pozo、Santos Fustero
DOI:10.1021/acs.orglett.5b00054
日期:2015.2.20
The use of chiral sulfinyl amines both as nucleophilic nitrogen sources and chiral inducers has been described for the first time in a desymmetrization-type process involving an intramolecular aza-Michael reaction. The resulting product was employed as an advanced intermediate in the totalsynthesis of the natural product hippodamine and epi-hippodamine, taking advantage of the special symmetry of