作者:Megan E. Hoerrner、Kristen M. Baker、Corey H. Basch、Earl M. Bampo、Mary P. Watson
DOI:10.1021/acs.orglett.9b02643
日期:2019.9.20
A Suzuki–Miyaura cross-coupling of α-pyridinium esters and arylboroxines has been developed. Combined with formation of the pyridinium salts from amino acid derivatives, this method enables amino acid derivatives to be efficiently transformed into α-aryl esters and amides. Under the mild conditions, broad functional group tolerance on both the amino acid derivatives and the arylboroxine are observed
α-吡啶鎓酯和芳基环硼氧烷的铃木-宫浦交叉偶联已被开发出来。结合氨基酸衍生物形成吡啶鎓盐,该方法能够将氨基酸衍生物有效转化为α-芳基酯和酰胺。在温和条件下,观察到氨基酸衍生物和芳基环硼氧烷具有广泛的官能团耐受性,包括质子官能团。机理研究支持烷基自由基中间体,类似于烷基吡啶鎓盐的其他交叉偶联。