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
    • 6. 发明授权
    • Preparation of 4-alkoxy-2-hydroxybenzophenone-5-sulfonic acids
    • 4-烷基-2-羟基苯并噻吩-5-磺酸的制备
    • US5072034A
    • 1991-12-10
    • US627895
    • 1990-12-13
    • Peter NeumannHeinz EilingsfeldAlexander Aumueller
    • Peter NeumannHeinz EilingsfeldAlexander Aumueller
    • C07C309/42C07C303/08C07C309/44C07C309/59
    • C07C303/08
    • 4-alkoxy-2-hydroxybenzophenone-5-sulfonic acids of the general formula I ##STR1## where R.sup.1 is C.sub.1 -C.sub.20 -alkyl which is unsubstituted or substituted by halogen, cyanao, hydroxyl, C.sub.1 -C.sub.20 -alkoxy, C.sub.2 -C.sub.20 -alkoxycarbonyl, acyloxy and/or phenyl which is unsubstituted or substituted by C.sub.1 -c.sub.4 -alkyl, C.sub.1 -C.sub.4 -alkoxy and/or halogen, R.sup.2 and R.sup.3 independently of one another are each hydrogen, halogen, C.sub.1 -C.sub.12 -alkyl, C.sub.1 -C.sub.12 -alkoxy, C.sub.1 -C.sub.4 -haloalkyl, C.sub.3 -C.sub.8 -cycloalkyl, C.sub.4 -C.sub.12 -cycloalkylalkyl, cyano, hydroxyl or hydroxyethyl or are each phenoxy, C.sub.7 -C.sub.10 -phenalkyl or phenyl which is unsubstituted or substituted by C.sub.1 -C.sub.4 -alkyl, C.sub.1 -C.sub.4 -alkoxy and/or halogen, and R.sup.4 is hydrogen or sulfo, are prepared by reacting a 4-alkoxy-2-hydroxybenzophenone of the general formula II ##STR2## with chlorosulfonic acid at from -20.degree. to +100.degree. C., by a novel and improved process in which the reaction is carried out in an aliphatic, cycloaliphatic and/or aromatic carboxylate as solvent.
    • 其中R 1是未被取代或被卤素,氰基,羟基,C 1 -C 20烷氧基,C 2 -C 20烷氧基取代的C 1 -C 20烷基的4-烷氧基-2-羟基二苯甲酮-5-磺酸 -C 20 - 烷氧基羰基,未被取代或被C 1 -C 4 - 烷基,C 1 -C 4 - 烷氧基和/或卤素取代的酰氧基和/或苯基,R 2和R 3彼此独立地为氢,卤素,C 1 -C 12 - 烷基 C 1 -C 12烷氧基,C 1 -C 4卤代烷基,C 3 -C 8环烷基,C 4 -C 12环烷基烷基,氰基,羟基或羟乙基,或各自为苯氧基,未取代或被C1- C4-烷基,C1-C4-烷氧基和/或卤素,R4是氢或磺基,是通过使通式II的4-烷氧基-2-羟基二苯甲酮与(II)的4-磺酰基-2- 通过一种新的改进的方法,其中反应在脂族,脂环族和/或芳族羧酸酯作为溶剂中进行。