作者:Cécile Beauve、Grégory Tjoens、Roland Touillaux、Josette Lamotte-Brasseur、Jacqueline Marchand-Brynaert、Jacques Fastrez
DOI:10.1002/(sici)1099-0690(199906)1999:6<1441::aid-ejoc1441>3.0.co;2-k
日期:1999.6
by reaction of (3S)-3-(tert-butoxycarbonyl) amino azetidin-2-one with benzyl, trichloroethyl, and trifluoroethyl chloroformates followed by tBoc deprotection, diazotation of the exocyclic amino function and its substitution with potassium bromide. The 3-bromoazetidin-2-ones were obtained as racemic mixtures. Their hydroxide-catalyzed hydrolysis exclusively affords ring-opening products. Porcine pancreatic
通过 (3S)-3-(叔丁氧羰基) 氨基氮杂环丁烷-2-one 与苄基、三氯乙基和三氟乙基氯甲酸酯反应,然后 tBoc 脱保护,重氮化环外氨基功能及其被溴化钾取代。3-bromoazetidin-2-ones 作为外消旋混合物获得。它们的氢氧化物催化水解专门提供开环产物。猪胰弹性蛋白酶 (PPE) 立体特异性地催化相同的反应。模型构建表明,酶促水解的是 (R) 异构体。PPE 催化的水解以低 k(cat) 和 Km 值为特征。因此,这些化合物表现为酶的瞬时抑制剂。