6S)-6-[(1R)-1-hydroxyethyl]-4-methyl-7-oxo-1-azabicyclo[3.2.0]hept-2-ene-2-carboxylic acid in yields of 67–87% after purification by column chromatography. The p-nitrobenzyl (pNb) esters of carbapenems have been converted to the corresponding acids by hydrogenolysis over 10% Pd/C in methanol. The antibacterial activity of the resulting carbapenems and their preceding pNb-esters has been studied against
通过 AdNE 取代 4-硝基苄基 (4R)-3-[(二苯基
磷酰基)氧基]-6-[(1R)-1-羟乙基]-4-的烯醇
磷酸酯基团,合成了新的 C-3 改性碳青霉烯类化合物在
二异丙基乙胺 (DI
PEA) 存在下,甲基-7-氧代-1-
氮杂双环 [3.2.0]hept-2-en-2-carboxylate 在
乙腈中通过相应的
硫醇生成。已使用
巯基乙酸甲酯、
呋喃-1-
甲硫醇、N-(巯基乙酰基)甲
硫氨酸甲酯和2-(4-甲基
哌嗪-1-基)-2-氧代
乙硫醇作为
硫醇。结果,我们获得了预期的 3-[(2-甲氧基-2-氧乙基)
硫基]-、3-[(2-
呋喃基甲基)
硫基]、3-[2-(4-甲基
哌嗪-1-基)-2-氧乙基]
硫代}和3-[((2-(S)-1-甲氧基-4-甲
硫基-1-氧代丙-2-基)
氨基)-2-氧乙基]
硫基(4R,5S,6S)-6-[(1R)-1-羟乙基]-4-methyl-7-oxo-1-azabicyclo[3