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Stereoconvergent Approach to the Enantioselective Construction of α‐Quaternary Alcohols by Radical Epoxide Allylation
Angewandte Chemie International Edition ( IF 16.6 ) Pub Date : 2024-04-26 , DOI: 10.1002/anie.202405911
Sebastian Höthker 1 , Annika Plato 2 , Stefan Grimme 3 , Zheng-Wang Qu 3 , Andreas Gansäuer 4
Affiliation  

: We describe a highly stereoconvergent radical epoxide allylation towards diastereomerically and enantiomerically enriched α‐quaternary alcohols in two steps from olefins. Our approach combines the stereospecifity and enantioselectivity of the Shi epoxidation with the unprecedented Ti(III)‐promoted intramolecular radical group transfer allylation of epoxides. A directional isomerization step via configurationally labile radical intermediates enables the selective preparation of all carbon quaternary stereocenters in a unique fashion.

中文翻译:

通过自由基环氧化物烯丙基化对映选择性构建 α-季醇的立体收敛方法

:我们描述了从烯烃到非对映体和对映体富集的 α-季醇的高度立体会聚自由基环氧化物烯丙基化反应,分两步进行。我们的方法将 Shi 环氧化的立体特异性和对映选择性与前所未有的 Ti(III) 促进的环氧化物分子内自由基基团转移烯丙基化结合起来。通过构型不稳定的自由基中间体的定向异构化步骤能够以独特的方式选择性制备所有碳四元立构中心。
更新日期:2024-04-26
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