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
    • 4. 发明公开
    • Process for the preparation of pyranones and pyrandiones
    • Verfahren zur Herstellung von Pyranonen und Pyrandionen。
    • EP0524495A1
    • 1993-01-27
    • EP92111663.8
    • 1992-07-09
    • F. HOFFMANN-LA ROCHE & CO. Aktiengesellschaft
    • Landi, John Joseph, Jr.Ramig, Keith Marriott
    • C07D309/32C07C69/675
    • C07C69/675C07D309/32
    • A process for the preparation of a tautomeric mixture of compounds of formulae

         wherein W is hydrogen or C₆H₁₃,
      which comprises treating a compound of the formula

      wherein R is unsubstituted or substituted alkoxy, arylalkoxy, aryloxy or amine and R¹ is hydrogen or when R is alkoxy, substituted alkoxy, substituted amine, unsubstituted or substituted arylalkoxy R¹ can also be metal, with a compound of formula

         wherein one of X and Y is a reducible group and the other is hydrogen or a reducible group, and Z is hydroxy or a leaving group,
      and the obtained compound of formula

      is treated with a low valent metal to form a tautomeric mixture of compounds of formulas I and Ia, which are useful in the synthesis of tetrahydrolipstatin.
    • 其中W是氢或C 6 H 13的化合物的互变异构体混合物的方法,其中包括处理式CHEM的化合物,其中R是未取代的或取代的烷氧基,芳基烷氧基,芳氧基或胺, 1>是氢或当R是烷氧基时,取代的烷氧基,取代的胺,未取代的或取代的芳基烷氧基R 1也可以是金属与式(CHEM)的化合物反应,其中X和Y之一是可还原的基团,而另一个 是氢或可还原基团,Z是羟基或离去基团,并且所得到的式化合物用低价金属处理以形成式I和Ia化合物的互变异构体混合物,其可用于 四氢脂肪抑制素的合成。