Carbapenem and penem antibiotics. I. Total synthesis and antibacterial activity of dl-asparenomycins A, B and C and related carbapenem antibiotics.
作者:HISAO ONA、SHOICHIRO UYEO、KIYOSHI MOTOKAWA、TADASHI YOSHIDA
DOI:10.1248/cpb.33.4346
日期:——
Racemic carbapenem antibiotics having a 1-(hydroxymethyl) ethylidene side-chain at C-6 [dl-asparenomycins A (54), B (37), C (53) and related compounds, 55, 56, 38, 59 and 45] were synthesized starting from the common intermediates 9a and 9b, and their antibacterial activities were examined. The synthesis involves transformation of a cyclic carbonate group into the 1-(hydroxymethyl) ethylidene moiety with a catalytic amount of 1, 8-diazabicyclo [5. 4. 0] undec-7-ene (DBU) in an appropriate solvent, and deblocking of the p-methoxybenzyl ester group by the AlCl3-anisole method.
具有C-6位1-(羟甲基)乙烯叉侧链的手性碳青霉烯类抗生素[dl-天冬霉素A(54)、B(37)、C(53)及相关化合物,55、56、38、59和45]从共同中间体9a和9b开始合成,并测试了它们的抗菌活性。合成过程包括在适当溶剂中使用少量1,8-二氮杂双环[5.4.0]十一碳-7-烯(DBU)将环碳酸酯基团转化为1-(羟甲基)乙烯叉基团,以及通过AlCl3-茴香醚方法去保护对甲氧基苄酯基团。