Nucleophilic Ring Opening of Cyclopropane Hemimalonates Using Internal Brønsted Acid Activation
作者:Michael R. Emmett、Michael A. Kerr
DOI:10.1021/ol201486x
日期:2011.8.19
The reaction of cyclopropanes, geminally disubstituted with one carboalkoxy and one carbohydroxy group, undergoes ring-opening reactions with indole nucleophiles under catalyst-free, hyperbaric (13 kbar) conditions. An internal hydrogen bond is postulated as the mode of activation obviating the need for the Lewis acid catalyst normally used for such donor–acceptor cyclopropane chemistry. These conditions
在一个无催化剂,高压(13 kbar)的条件下,被一个碳烷氧基和一个碳羟基双取代的环丙烷的反应与吲哚亲核试剂发生开环反应。假定内部氢键是活化方式,从而消除了通常用于这种供体-受体环丙烷化学反应的路易斯酸催化剂的需求。这些条件避免了脱羧作用,并产生了具有完整的羧酸基团的有用的加合物,用于进一步的加工。