A new synthesis of alkaloid (<i>S</i>)-3-hydroxypiperidin-2-one and its<i>O</i>-TBS protected derivative
作者:Pei-Qiang Huang、Guo Chen、Xiao Zheng
DOI:10.1002/jhet.5570440239
日期:2007.3
From the known lactone (S)-4, easily derived from L-glutamic acid, a scalable approach to chiral building block O-silylated 3-hydroxypiperidin-2-one 3 and alkaloid 1 was achieved in five and six-steps respectively. The key steps are a chemoselective amidation of lactone-ester 5 and a one-pot reductive borane-decomplexation, N-debenzylation and cyclization.