Ionic liquid reagents created by addition of 1 equiv of either CF3CO2H or CF3SO3H to N-pentylpyridinium bromide exhibit excellent chemical reactivities as surrogate HBr reagents in ring-opening reactions of cyclopropyl ketones as well as of 2,2-difluorocyclopropyl ketones to form the respective 3-bromopropyl or 3-bromo-2,2-difluoropropyl ketones in good to excellent yields.
通过将1当量的CF 3 CO 2 H或CF 3 SO 3 H加到N-戊基
吡啶溴化物中而形成的
离子液体试剂具有极好的
化学反应性,在环丙基酮和2,2的开环反应中可替代HBr试剂。 -二
氟环丙基酮以良好至优异的产率形成各自的3-
溴丙基或3-溴-2,2-二
氟丙基酮。