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
Gold(I)-Catalyzed Rearrangement of Propargylic Alcohols to α,β-Unsaturated Ketones
作者:Young Chung、Sang Lee、Ji Baek、So Sim
DOI:10.1055/s-2007-983725
日期:——
We have developed a gold(I)-catalyzed rearrangement of propargylic alcohols to α,β-unsaturated ketones. The reaction might proceed through a dehydration of an alkynol, followed by an addition of water to a cumulene intermediate. The substituents of the alkynol play an important role in the rearrangement.