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MICA活性硫酯工艺研究 被引量:1

Synthesis of MICA Activated Thioester
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摘要 描述了以乙腈为溶剂,在亚磷酸三乙酯和三乙胺存在下,使MICA和DM进行反应,合成第三代头孢菌素类抗生素头孢克肟(cefixime)、卡芦莫南(Carumonam)关键中间体,(Z)-2-(2-氨基噻唑-4-基)-2-甲氧羰基甲氧亚氨基硫代乙酸(S-2-苯并噻唑)酯的方法.最高收率为60.5%,最佳原料摩尔比为1∶1.2∶1.2∶1.2.所得目标化合物经过与样品化合物红外光谱数据、核磁共振光谱数据比对得到确认. S-2-Benzothiazolyl(Z)-2-(2-Aminothiazol-4-yl)-2-methoxycarbonyl methoxy imino thioacetate(MICA activated thioester),a key intermediate for Cefixime and Carumonam,is synthesized by the esterification reaction of(Z)-2-(methoxycarbonyl methoxyimino)-2-(2-Aminothiazol-4-yl) acetic acid(1) with dibenzothiazolyl disulfide(2) in acetonitrile in presence of P(OEt)3 instead of Ph3 P and Et3N with 60.5% yield.The best molar ratio of(1),(2),(P(OEt)3) and Et3N is 1∶1.2∶1.2∶1.2.The structure of the target compound is confirmed by the its IR and 1HNMR data with that of the standard sample.
出处 《河南师范大学学报(自然科学版)》 CAS CSCD 北大核心 2009年第6期165-167,共3页 Journal of Henan Normal University(Natural Science Edition)
基金 江苏省高校自然科学基础研究基金(08KJD350003) 江苏省南通大学自然科学基础研究基金(07Z086)
关键词 头孢克肟 卡芦莫南 MICA活性酯 亚磷酸三乙酯 cefixime and carumonam MICA activated thioester triethyl phosphite
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