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