First Total Synthesis of the 4<i>a</i>-Methyltetrahydrofluorene Diterpenoids (±)-Dichroanal B and (±)-Dichroanone
作者:Mainak Banerjee、Ranjan Mukhopadhyay、Basudeb Achari、Asish Kr. Banerjee
DOI:10.1021/ol035506b
日期:2003.10.1
[reaction: see text] A simple synthesis of the 4a-methyltetrahydrofluorene diterpenoids (+/-)-dichroanal B and (+/-)-dichroanone has been achieved through a common hexahydrofluorenoneintermediate obtained via Pd(0)-catalyzed reductive cyclization of a substituted 2-(2-bromobenzyl) methylene cyclohexane.