Metal triflate-catalyzed cyclization of arylvinylcarbinols: formal synthesis of (±)-dichroanone and (±)-taiwaniaquinone H
作者:Badrinath N. Kakde、Subhadip De、Dhananjay Dey、Alakesh Bisai
DOI:10.1039/c3ra41497c
日期:——
A formal synthesis of diterpenoids viz. the taiwaniaquinoids (±)-dichroanone (1a) and (±)-taiwaniaquinone H (1b) possessing an all carbon quaternary stereocenter has been reported. The key step involves a metal triflate-catalyzed cyclization of arylvinylcarbinols, prepared from β-cyclocitral. The reaction possibly follows a stepwise mechanism via the intermediacy of arylallyl carbocationic species