Programmed Enzyme-Mimic Hydrolysis of a Choline Carbonate by a Metal-Free 2-Aminobenzimidazole-Based Cavitand
摘要:
The hydrolysis of a choline carbonate through a metal-free, enzyme-like mechanism has been achieved using a 2-aminobenzimidazole-based deep cavitand as catalyst. The supramolecular catalysis involves three steps: host guest binding, carbamoylation and enzyme-like hydrolysis. Interestingly the rate-determining step proceeds through a programmed hydrolysis of carbamoylcholine-cavitand intermediate that may be driven by water molecules surrounding the benzimidazole walls of the cavity.