this transformation, the ortho-phosphanyl substituent in the chalcones is crucial for controlling their reactivity and selectivity. It also serves as a reliable alkyl transfer shuttle to transform electrophilic alkyl bromides into nucleophilic alkyl species in the form of quaternary phosphonium salts and transfer the alkyl group effectively to the β-position of the chalcones. This alkyl transfer strategy
我们报告了一种有效的烷基转移策略,用于使用市售的烷基
溴化物作为烷基试剂对
查耳酮进行直接 β-烷基化。在这种转化中,
查尔酮中的邻
磷取代基对于控制其反应性和选择性至关重要。它还作为可靠的烷基转移梭,将亲电烷基
溴化物转化为季
鏻盐形式的亲核烷基物质,并将烷基有效地转移到
查耳酮的 β-位。这种烷基转移策略可以进一步扩展到邻
磷酰基
苯甲醛的烯基化以组装功能化多烯。