Enantioselective Base-Free Electrophilic Amination of Benzofuran-2(3H)-ones: Catalysis by Binol-Derived P-Spiro Quaternary Phosphonium Salts
作者:Chuan-Le Zhu、Fa-Guang Zhang、Wei Meng、Jing Nie、Dominique Cahard、Jun-An Ma
DOI:10.1002/anie.201100283
日期:2011.6.20
A spiroing reactivity: A series of novel binol‐derived P‐spiro quaternary phosphonium salts were designed, prepared, and used for the first highly enantioselective amination of benzofuranones (see scheme; binol=1,1′‐2‐binaphthol, Bn=benzyl). An unprecedented mechanism involving the π–π interactions between the substrate and the catalyst was proposed as the primary binding mode on the basis of molecular
甲 螺荷兰国际集团的反应性:一系列新颖BINOL衍生的P -螺季鏻盐分别设计,制备,并用于苯并呋喃酮的第一高度对映选择性胺化(参见方案; BINOL = 1,1'- -2-联萘酚,BN =苄基)。在分子建模和DFT计算的基础上,提出了一种前所未有的机制,涉及底物与催化剂之间的π-π相互作用,作为主要的结合方式。