Probable Role of Clavaminic Acid as the Terminal Intermediate in the Common Pathway to Clavulanic Acid and the Antipodal Clavam Metabolites
作者:Laura A. Egan、Robert W. Busby、Dirk Iwata-Reuyl、Craig A. Townsend
DOI:10.1021/ja963107o
日期:1997.3.1
ornithine/arginine in the identical regiochemical sense in all of these natural products, and has established the common intermediacy of the monocyclic β-lactam proclavaminic acid (12) as well. In this paper the quite advanced bicyclic intermediate clavaminic acid (14) has been synthesized in doubly 13C-labeled form by preparative incubation of recombinant clavaminate synthase. The intact and equally efficient
新出现的化学和遗传证据表明,单独的生化溶液已经演变为合成四种已知类别的 β-内酰胺抗生素。其中一类包含克拉维酸 (1) 和一系列结构相关但反足的克拉瓦姆代谢物 2-5、7 和 8,它们在 C-3 处缺少羧酸盐,具有不同的氧化态,并在 C-处表现出立体化学特征2. 先前的工作已经证明在所有这些天然产物中都以相同的区域化学意义掺入了鸟氨酸/精氨酸,并且还建立了单环 β-内酰胺原内酰胺酸 (12) 的共同中间体。在本文中,非常先进的双环中间体棒胺酸 (14) 已通过重组棒胺酸合酶的制备孵育以双 13C 标记的形式合成。