Tandem addition/cyclization for synthesis of 2-aroyl benzofurans and 2-aroyl indoles by carbopalladation of nitriles
作者:Julin Gong、Kun Hu、Yinlin Shao、Renhao Li、Yetong Zhang、Maolin Hu、Jiuxi Chen
DOI:10.1039/c9ob02408e
日期:——
example of the palladium-catalyzed tandem addition/cyclization of 2-(2-acylphenoxy)acetonitriles with arylboronic acids has been developed, providing a new strategy for the synthesis of 2-aroyl benzofurans with excellent chemoselectivity and wide functional group compatibility. Preliminary mechanistic experiments indicate that this tandem process involves sequential nucleophilic addition generating 2
已经开发了钯催化串联2-(2-酰基苯氧基)乙腈与芳基硼酸的串联/加成反应的第一个实例,为合成具有优异的化学选择性和广泛的官能团相容性的2-芳酰基苯并呋喃提供了新的策略。初步的机理实验表明,该串联过程涉及顺序的亲核加成,产生2-(2-酰基苯氧基)-1-苯基乙-1-酮,然后进行分子内环化。该方法也已用于2-芳酰基吲哚和强效CYP19抑制剂1-(苯并呋喃-2-基(苯基)甲基)-1H-1,2,4-三唑的合成。