Synthesis of 1β-Methylcarbapenem Antibiotic Precursors by Cyclization Using π-Allylpalladium Complexes
作者:Jean-Christophe Galland、Sylvain Roland、Joël Malpart、Monique Savignac、Jean-Pierre Genet
DOI:10.1002/(sici)1099-0690(199903)1999:3<621::aid-ejoc621>3.0.co;2-a
日期:1999.3
diastereoselective multi-step synthesis of bicyclic 1β-methylcarbapenem antibiotic precursors has been developed, starting from the commercially available 4-acetoxyazetidin-2-one 4. Chiral ruthenium catalysts are used in the hydrogenation step to control the β-stereochemistry at the 1-position, and a π-allylpalladium ring-closure strategy is used to form the functionalized carbapenem skeleton.
从市售的 4-乙酰氧基氮杂环丁烷-2-one 4 开始,开发了双环 1β-甲基碳青霉烯类抗生素前体的高效非对映选择性多步合成。手性钌催化剂用于氢化步骤以控制 1 处的 β-立体化学-位置,并且使用π-烯丙基钯闭环策略形成功能化碳青霉烯骨架。