Visible-Light-Mediated Nucleophilic Addition of an α-Aminoalkyl Radical to Isocyanate or Isothiocyanate
作者:Hongxia Zhou、Ping Lu、Xiangyong Gu、Pixu Li
DOI:10.1021/ol402573j
日期:2013.11.15
A visible-light photoredox synthesis of α-amino amide or α-amino thioamide from N,N-dimethylaniline derivatives and aryl isocyanate or aryl isothiocyanate was developed. Bis[2-(4,6-difluorophenyl)pyridinato-C2,N](picolinato)iridium(III) (FIrpic) was found to be the effective catalyst among six catalysts screened. The reaction involves generation of α-aminoalkyl radicals from tertiary amines, followed
开发了由N,N-二甲基苯胺衍生物和异氰酸芳基酯或异硫氰酸芳基酯合成α-氨基酰胺或α-氨基硫代酰胺的可见光氧化还原。发现在筛选的六种催化剂中,双[2-(4,6-二氟苯基)吡啶基-C 2,N](吡啶并)铱(III)(FIrpic)是有效的催化剂。该反应涉及由叔胺产生α-氨基烷基自由基,然后将自由基加成到异氰酸酯和异硫氰酸酯的电子不足的碳上。