Decarboxylative Borylation and Cross-Coupling of (Hetero)aryl Acids Enabled by Copper Charge Transfer Catalysis
作者:Nathan W. Dow、P. Scott Pedersen、Tiffany Q. Chen、David C. Blakemore、Anne-Marie Dechert-Schmitt、Thomas Knauber、David W. C. MacMillan
DOI:10.1021/jacs.2c01630
日期:2022.4.13
We report a copper-catalyzed strategy for arylboronic ester synthesis that exploits photoinduced ligand-to-metal charge transfer (LMCT) to convert (hetero)aryl acids into aryl radicals amenable to ambient-temperature borylation. This near-UV process occurs under mild conditions, requires no prefunctionalization of the native acid, and operates broadly across diverse aryl, heteroaryl, and pharmaceutical
我们报告了一种用于芳基硼酸酯合成的铜催化策略,该策略利用光诱导配体到金属电荷转移 (LMCT) 将(杂)芳基酸转化为适合环境温度硼化的芳基自由基。这种近紫外过程在温和条件下发生,不需要对天然酸进行预功能化,并且广泛适用于各种芳基、杂芳基和药物底物。我们还报告了一种用于脱羧交叉偶联的一锅程序,该程序将催化 LMCT 硼酸化和钯催化的 Suzuki-Miyaura 芳基化、乙烯基化或与有机溴化物的烷基化结合起来,以获得一系列增值产品。通过开发异选择性双脱羧 C(sp 2 )–C(sp 2)偶联序列,铜催化的两种不同酸(包括药物底物)的 LMCT 硼化和卤化过程与随后的 Suzuki-Miyaura 交叉偶联配对。