A Catalytic, Asymmetric Formal Synthesis of (+)-Hamigeran B
作者:Herschel Mukherjee、Nolan T. McDougal、Scott C. Virgil、Brian M. Stoltz
DOI:10.1021/ol102669z
日期:2011.3.4
A concise asymmetric, formalsynthesis of (+)-hamigeran B is reported. A Pd-catalyzed, decarboxylative allylic alkylation, employing a trifluoromethylated derivative of t-BuPHOX, is utilized as the enantioselective step to form the critical quaternary carbon center in excellent yield and enantioselectivity. The product is converted in three steps to a late-stage intermediate previously used in the
报告了 (+)-hamigeran B 的简明不对称正式合成。使用t- BuPHOX的三氟甲基化衍生物的 Pd 催化的脱羧烯丙基烷基化被用作对映选择性步骤,以优异的产率和对映选择性形成关键的季碳中心。该产品分三步转化为先前用于合成 hamigeran B 的后期中间体。