无金属路易斯酸介导的膦脱氢偶联及同时氢化反应
Metal-free Lewis acid mediated dehydrocoupling of phosphines and concurrent hydrogenation.
作者信息
Dobrovetsky Roman, Takeuchi Katsuhiko, Stephan Douglas W
机构信息
Department of Chemistry, University of Toronto 80 St. George Street, Toronto, Ontario M5S 3H6, Canada.
出版信息
Chem Commun (Camb). 2015 Feb 11;51(12):2396-8. doi: 10.1039/c4cc09526j.
PMID:25564430
Abstract
The stoichiometric reaction of trityl cation with two equivalents of Ph2PH affords the phosphine stabilized phosphenium salt [Ph2(H)PPPh2][B(C6F5)4] via hydride abstraction, while catalytic amounts of B(p-HC6F4)3 effects catalytic phosphine dehydrocoupling with the liberation of H2. This reaction is accelerated by the presence of olefin or imine, effecting concurrent hydrogenation.
摘要
三苯甲基阳离子与两当量的二苯基膦发生化学计量反应，通过氢负离子转移生成膦稳定的鏻盐[Ph2(H)PPPh2][B(C6F5)4]，而催化量的B(p-HC6F4)3则催化膦脱氢偶联并释放出H2。烯烃或亚胺的存在会加速该反应，实现同时氢化。
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