Total asymmetric synthesis of (7S,9R)-(+)-bisacumol
作者:Anpai Li、Guoren Yue、Yang Li、Xinfu Pan、Teng-Kuei Yang
DOI:10.1016/s0957-4166(02)00759-0
日期:2003.1
A facile stereoselective synthetic route to (7S,9R)-(+)-bisacumol 1 has been achieved. This novel approach derives its asymmetry by employing asymmetric dihydroxylation and CBS reduction processes. The resulting sesquiterpene 1 was produced with highly enantio- and diastereoselectivity. (C) 2003 Elsevier Science Ltd. All rights reserved.
Asymmetric synthesis of (R)-ar-curcumene, (R)-4,7-dimethyl-l-tetralone, and their enantiomers via cobalt-catalyzed asymmetric Kumada cross-coupling
An efficient and concise asymmetric synthesis of (R)-(+)-ar-curcumene, (R)-4,7-dimethyl-1-tetralone, and their enantiomers was accomplished. The key step to construct the stereogenic benzylmethyl centers of these natural products is the cobalt-catalyzed asymmetric Kumada cross-coupling reaction of a racemic alpha-bromo ester. (C) 2015 Elsevier Ltd. All rights reserved.