thiazolidine-ring nitrogen as a nucleophile that drives a rapid intramolecular displacement on the side chain. Attachment of 7-hydroxy-4-methylcoumarin as the releasable group of this side chain generated a penicillin structure that can function as a fluorescence-based reporter substance/diagnostic for the presence of low levels of beta-lactamase enzyme in solution. Mechanistic details of the reaction pattern
可以通过在6位上掺入
乙烯基酯侧链来修饰Penam核,使其表现为依赖于β-内酰胺酶的“前药”。β-内酰胺环的酶催化
水解揭示了
噻唑烷环氮作为亲核体,可驱动侧链上的分子内快速移位。7-羟基-4-甲基
香豆素作为该侧链的可释放基团的连接产生了
青霉素结构,其可以用作基于荧光的报告分子/对溶液中低
水平的β-内酰胺酶的诊断。记录了反应模式的机械细节,并讨论了利用结构修饰的范围和局限性。