Novel Approach to the (-)-Sparteine-Mediated Synthesis of Kainoids:Total Synthesis of (-)-α-Kainic Acid by (-)-Sparteine-Mediated Deprotonation
作者:M. Montserrat Martínez、Dieter Hoppe
DOI:10.1002/ejoc.200400824
日期:2005.4
We report a new synthesis of kainoids via allyllithium compounds using an intramolecular cycloalkylation as the key step. Preparation of different substituted pyrrolidines was carried out by using carbamates, that react with the chiral base n-BuLi/(–)-sparteine with strong selection between the diastereotopic protons adjacent to the carbamate group in favour for the pro-S proton. (–)-α-Kainic acid was