Thiazolidine ring opening in penicillin derivatives. Part 2. Enamine formation
作者:Andrew M. Davis、Nicola J. Layland、Michael I. Page、Frances Martin、Rory More O'Ferrall
DOI:10.1039/p29910001225
日期:——
the thiazolidine ring and reversibly generate an enamine intermediate. Kinetic analysis and hydrolysis in D2O do not indicate a significant build-up of this intermediate during hydrolysis of the methyl ester. However, over the pH range 4–11 the rate of thiazolidine ringopening is competitive with hydrolysis of the ester function. The deuterium solvent kinetic isotope effect on the ring closure reaction