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
    • 2. 发明授权
    • Method for producing benzylidene derivatives
    • 亚苄基衍生物的制备方法
    • US5463052A
    • 1995-10-31
    • US246494
    • 1994-05-20
    • Nobuhiro HagaMasanao InagakiSaichi MatsumotoSusumu Kamata
    • Nobuhiro HagaMasanao InagakiSaichi MatsumotoSusumu Kamata
    • C07D207/26C07D265/02C07D275/02C07D279/02C07D281/02C07D281/18C07D291/00C07D291/04C07D291/06
    • C07D275/02C07D265/02C07D291/06Y02P20/55
    • A selective and high-yield method is described for producing stereoisomeric benzylidene derivatives of the formula III: ##STR1## wherein R.sup.1 and R.sup.2 each independently is lower alkyl, lower alkoxy or halogen; Y is SO.sub.2, SO or CO; --A-- is optionally substituted lower alkylene; --B-- is --CH.sub.2 -- or --O--; or --A-- and --B-- taken together may form optionally substituted phenylene or optionally substituted lower alkenylene; and R is hydrogen, optionally substituted lower alkyl, cycloalkyl, lower alkoxy, hydroxy, optionally substituted aryl, optionally substituted arylalkyl; optionally substituted arylalkyloxy, heterocyclic ring or N-protecting groups, which comprises reacting a compound of the formula I: ##STR2## wherein R.sup.1 and R.sup.2 are as defined above and X is lower alkoxy or halogen with a compound of the formula II: ##STR3## wherein Y, --A--, --B-- and R are as defined above in the presence of a base.
    • 描述了用于制备式III的立体异构亚苄基衍生物的选择性和高产率方法:其中R 1和R 2各自独立地为低级烷基,低级烷氧基或卤素; Y是SO2,SO或CO; -A-是任选取代的低级亚烷基; -B-是-CH 2 - 或-O-; 或-A-和-B-可以一起形成任选取代的亚苯基或任选取代的低级亚烯基; 并且R是氢,任选取代的低级烷基,环烷基,低级烷氧基,羟基,任选取代的芳基,任选取代的芳基烷基; 任选取代的芳基烷氧基,杂环或N-保护基,其包括使式I化合物:其中R 1和R 2如上所定义,X是低级烷氧基或卤素与式II化合物反应: 图像II其中Y,-A-,-B-和R如上所定义,在碱的存在下。