A novel synthesis method for the construction of 3-coumaranones from the reaction of two molecules, calcium carbide and salicylaldehyde, was reported. Various 2-methyl-2-vinylbenzofuran-3(2H)-ones could be obtained in moderate yields in the absence of a metal catalyst. The salient features of this protocol involve widely available starting materials, an inexpensive and easy-to-handle alkyne source
报道了一种由
碳化钙和
水杨醛这两个分子反应构建3-香豆醛的新型合成方法。在不存在
金属催化剂的情况下,可以以中等收率获得各种2-甲基-2-
乙烯基苯并呋喃-3(2 H)-one。该协议的显着特征包括广泛可用的起始原料,廉价且易于处理的
炔烃来源以及经济高效的途径。通过可能的中间体和相应的过渡态的密度泛函理论计算验证了反应机理。