Metal-free synthesis of chlorinated and brominated phosphinoyl 1,3-butadiene derivatives and its synthetic applications
作者:Teng Liu、Yun-Tao Xia、Jie Zhu、Ai-Min Lu、Lei Wu
DOI:10.1016/j.tetlet.2015.10.029
日期:2015.11
We report here an efficient and transition-metal free strategy for the synthesis of chlorinated and brominated phosphinoyl 1,3-butadienes and derivatives. Pre-prepared HCl/HBr solutions enabled the in situ rearrangement of phosphinoyl-α-allenic alcohols to conjugated vinyl cations, which afforded various novel polysubstituted phosphinoyl 1,3-butadienes in medium to excellent yields. The resulting products
我们在这里报告了一种有效且无过渡金属的策略,用于合成氯化和溴化的膦酰基1,3-丁二烯及其衍生物。预先制备的HCl / HBr溶液可将膦酰基-α-烯丙醇原位重排为共轭乙烯基阳离子,从而以中等至优异的收率提供了各种新型的多取代膦酰基1,3-丁二烯。所得产物可以转化为多官能化的烯丙基膦氧化物。此外,它们与缺电子的芳基硼酸的偶联提供了一种合成缺电子的膦酰基1,3-丁二烯的有效方法。