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
    • 8. 发明授权
    • Intermediates and method for producing intermediates useful in the
preparation of 7-oxabicycloheptane prostaglandin derivatives
    • 用于制备可用于制备7-氧杂双环庚烷前列腺素衍生物的中间体的中间体和方法
    • US4515972A
    • 1985-05-07
    • US543564
    • 1983-10-19
    • Jagabandhu DasMartin F. Haslanger
    • Jagabandhu DasMartin F. Haslanger
    • C07D321/00C07D493/08C07D493/18C07D307/77
    • C07D493/08
    • A method is provided for preparing intermediates for use in preparing 7-oxabicycloheptane prostaglandin derivatives which method includes the steps of reducing (exo)hexa hydro-4,5-epoxyisobenzofuran-1,3-dione to the corresponding diol, subjecting the diol to a chloroformylation reaction to form a compound of the structure ##STR1## reacting the above with pyridine to form the cyclic carbonate reacting the cyclic carbonate with an alkanol to form the alcohol of the strucure ##STR2## tosylating the above alcohol to form the tosylate and subjecting the above tosylate to a cyanation reaction to form the cyano carbonate of the structure ##STR3## The cyano carbonate may then be reduced by, for example, reaction with diisobutyl aluminum hydride to form the hemiacetal ##STR4## which is used in preparing 7-oxabicycloheptane prostaglandin derivatives as disclosed in U.S. Pat. No. 4,143,054.New intermediates of the structures set out above, other than the hemiacetal, are also provided.
    • 提供了一种用于制备用于制备7-氧杂双环庚烷前列腺素衍生物的中间体的方法,该方法包括将六氢-4,5-环氧异苯并呋喃-1,3-二酮还原(外)至相应的二醇,使二醇进行 形成结构的化合物,使上述物质与吡啶反应形成环状碳酸酯,使环状碳酸酯与链烷醇反应形成结构式的醇,以使上述醇甲酰化以形成甲苯磺酸酯,并使 甲苯磺酸酯化至氰化反应以形成结构的氰基碳酸酯。然后可以通过例如与二异丁基氢化铝反应来还原氰基碳酸酯以形成用于制备7-氧杂双环庚烷前列腺素的半缩醛 衍生物,如美国专利No. 第4,143,054号。 还提供了除了半缩醛之外的上述结构的新中间体。