An efficient synthesis of 6-oxopenicillanic and 7-oxocephalosporanic acid derivatives
作者:Daijiro Hagiwara、Kozo Sawada、Tetsuo Ohnami、Matsuhiko Aratani、Masashi Hashimoto
DOI:10.1039/c39820000578
日期:——
(7a–c) with (CF3SO2)2O gave the bis(trifluoromethylsulphonate) derivatives (5) and (8a–c), which were then converted into the imines (6) and (9a–c) by treatment with 1,5-diazabicyclo[5.4.0] undec-5-ene or triethylamine, and subsequently hydrolysed with dilute HCl to give the 6-oxopenicillanic acids (1) and 7-oxocephalosporanic acids (2), respectively.
用(CF 3 SO 2)2 O对6-氨基青霉酸苄酯(3)和7-氨基头孢烷酸酯(7a – c)进行三氟甲烷磺化,得到双(三氟甲基磺酸酯)衍生物(5)和(8a – c),然后将其转化为通过用1,5-二氮杂双环[5.4.0]十一碳烯或三乙胺处理亚胺(6)和(9a – c),然后用稀HCl水解,得到6-氧黄柏酸(1)和7 -oxocephalosporanic酸(2)。