Photoredox Generation of Carbon-Centered Radicals Enables the Construction of 1,1-Difluoroalkene Carbonyl Mimics
作者:Simon B. Lang、Rebecca J. Wiles、Christopher B. Kelly、Gary A. Molander
DOI:10.1002/anie.201709487
日期:2017.11.20
facile, scalable route to access functional‐group‐rich gem‐difluoroalkenes. Using visible‐light‐activated catalysts in conjunction with an arsenal of carbon‐radical precursors, an array of trifluoromethyl‐substituted alkenes undergoes radical defluorinative alkylation. Nonstabilized primary, secondary, and tertiary radicals can be used to install functional groups in a convergent manner, which would otherwise
描述了一种方便,可扩展的途径来访问功能基团丰富的宝石-二氟烯烃。将可见光活化的催化剂与碳自由基前体库结合使用,可将三氟甲基取代的烯烃阵列进行自由基脱氟烷基化反应。不稳定的伯,仲和叔自由基可用于以汇聚方式安装官能团,否则这将受到双电子途径的挑战。该过程很容易扩展到其他全氟烷基取代的烯烃。此外,我们报告了有机三氟硼酸盐试剂的开发,以加快必要的三氟甲基取代的烯烃原料的合成。