会员体验
专利管家(专利管理)
工作空间(专利管理)
风险监控(情报监控)
数据分析(专利分析)
侵权分析(诉讼无效)
联系我们
交流群
官方交流:
QQ群: 891211   
微信请扫码    >>>
现在联系顾问~
热词
    • 58. 发明授权
    • Process for the manufacture of 4-acetoxy-3-hydroxyethyl-azetidinone
    • 制备4-乙酰氧基-3-羟乙基 - 氮杂环丁酮的方法
    • US5312914A
    • 1994-05-17
    • US937457
    • 1992-08-27
    • Gottfried SedelmeierJacques Bersier
    • Gottfried SedelmeierJacques Bersier
    • C07D205/08C07D307/68C07B53/00C07D307/66
    • C07D205/08C07D307/68
    • The invention relates to a novel process for the manufacture of 4-acetoxy-3-hydroxyethyl-azetidinone of the formula ##STR1## especially 4(R)-acetoxy-3(R)-(1'(R)-hydroxyethyl)-2-azetidinone, from enantiomerically pure compounds of the formula ##STR2## in which R.sup.1 represents lower alkyl and Z.sup.1 represents amino, arylmethylamino, acylamino or azido, by reduction of the C.dbd.C double bond and optionally of the arylmethylamino or azido group with hydrogen, epimerization, opening of the lactone ring, cyclisation to the .beta.-lactam, optionally after hydrolysis of the acylamino group, and oxidative decarboxylation of the original lactone carboxy group in the presence of an acetate-yielding agent. Compounds of the formula I can be used as starting materials for the manufacture of .beta.-lactam antibiotics. The invention also relates to novel intermediates and starting materials.
    • 本发明涉及制备式(I)的4-乙酰氧基-3-羟乙基 - 氮杂环丁酮的新方法,特别是4(R) - 乙酰氧基-3(R) - (1'(R) - 羟乙基 )-2-氮杂环丁酮,由对映异构体纯的式Y1和Z1表示氨基,芳基甲基氨基,酰氨基或叠氮基,通过还原C = C双键和任选的芳基甲基氨基或叠氮基与氢,差向异构化,开环 内酯环,任选地在酰基氨基水解后环化成β-内酰胺,以及在产生乙酸酯的试剂存在下原始内酯羧基的氧化脱羧作用。 式I化合物可用作制备β-内酰胺抗生素的起始原料。 本发明还涉及新的中间体和起始材料。