Construction of Carbo- and Heterocycles Using Radical Relay Cyclizations Initiated by Alkoxy Radicals
作者:Hai Zhu、Jason G. Wickenden、Natalie E. Campbell、Joe C. T. Leung、Kayli M. Johnson、Glenn M. Sammis
DOI:10.1021/ol900481e
日期:2009.5.7
construction of carbo- and heterocycles has been developed using radical relay cyclizations initiated by alkoxy radicals. Linear substrates were cyclized to form a wide range of cyclopentane, pyrrolidine, tetrahydropyran, and tetrahydrofuran derivatives in excellent yields. This methodology was utilized as a key step in the synthesis of the tetrahydrofuran fragment in (−)-amphidinolide K.
利用烷氧基自由基引发的自由基中继环化,已经开发出一种快速构建碳环和杂环的有效方法。线性底物被环化以优异的收率形成各种环戊烷,吡咯烷,四氢吡喃和四氢呋喃衍生物。该方法被用作合成(-)-两性内酯K中四氢呋喃片段的关键步骤。