approach for divergent synthesis of carbonylated and hydroxylated benzofurans from 1,6-enynes and bromomalonates under mild conditions. Significantly, mechanistic studies reveal that the homolysis of C–Br bonds appears to experience an energy-transfer pathway, and the atom-transfer radical addition products are the key intermediates to generate carbonylated and hydroxylated benzofurans.
已经开发了
溴丙二酸的可见光诱导的 1,6-烯炔触发的 C-Br 键均裂。这种无过渡
金属、无光催化剂、无氧化剂和无添加剂的方案为在温和条件下从 1,6-烯炔和
溴丙二酸进行不同合成羰基化和羟基化
苯并呋喃提供了一种有效的方法。重要的是,机理研究表明,C-Br 键的均裂似乎经历了能量转移途径,原子转移自由基加成产物是生成羰基化和羟基化
苯并呋喃的关键中间体。