Aryl Ketone Mediated Photoinduced Radical Coupling for the Alkylation of Benzazoles Employing Saturated Heterocyclic Compounds
作者:Shin Kamijo、Kaori Kamijo、Toshihiro Murafuji
DOI:10.1055/s-0037-1611895
日期:2019.10
Abstract An aryl ketone mediated synthesis of 2-alkylated benzazoles was achieved via radical coupling under photoirradiation starting from saturated heterocycles and 2-sulfonylated benzazoles, such as benzothiazoles, benzoxazole, and benzimidazole. Heterocyclic compounds, including a cyclic ether, azacycles, and tetrahydrothiophene, were applicable, and the benzazole unit was site-selectively installed
抽象的 芳基酮介导的2-烷基化苯并恶唑的合成是通过在光辐照下进行自由基偶联而实现的,该自由基从饱和杂环和2-磺酰基化的苯并恶唑例如苯并噻唑,苯并恶唑和苯并咪唑开始。适用的杂环化合物包括环醚,氮杂环和四氢噻吩,并且将苯并唑单元选择性安装在杂原子附近的碳中心。本转化在环境温度下在中性反应条件下进行,无需任何金属催化剂或试剂的帮助。 芳基酮介导的2-烷基化苯并恶唑的合成是通过在光辐照下进行自由基偶联而实现的,该自由基从饱和杂环和2-磺酰基化的苯并恶唑例如苯并噻唑,苯并恶唑和苯并咪唑开始。适用的杂环化合物包括环醚,氮杂环和四氢噻吩,并且将苯并唑单元选择性安装在杂原子附近的碳中心。本转化在环境温度下在中性反应条件下进行,无需任何金属催化剂或试剂的帮助。