Synthetic Studies of Carbapenem and Penem Antibiotics. V. Efficient Synthesis of the 1.BETA.-Methylcarbapenem Skeleton.
作者:Makoto SUNAGAWA、Akira SASAKI、Haruki MATSUMURA、Koshiro GODA、Katsumi TAMOTO
DOI:10.1248/cpb.42.1381
日期:——
An efficient synthesis of 1β-methylcarbapenem from the 1-(2-oxoazetidinyl)acetate 8 was developed by application of the Dieckmann reaction. Dieckmann-type cyclization of 8 and conversion to the enolphosphate 10 were achieved without epimerization to the 1α-methyl isomer in a one-pot procedure. Treatment with the mercaptan 22 after the phosphorylation resulted in a practical one-pot preparation of the 1β-methylcarbapenem derivative 23 from 8.
通过应用 Dieckmann 反应,开发了从 1-(2-氧代氮杂环丁酯)乙酸酯 8 高效合成 1β-甲基碳青霉烯的方法。 8 的 Dieckmann 型环化和烯醇磷酸 10 的转化是通过一锅法实现的,无需差向异构化为 1α-甲基异构体。磷酸化后用硫醇22处理导致从8中一锅法制备出1β-甲基碳青霉烯衍生物23。