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    • 1. 发明授权
    • Nucleophile assisting leaving groups
    • 亲核试剂帮助离群
    • US08822707B2
    • 2014-09-02
    • US11667414
    • 2005-11-14
    • Salvatore Lepore
    • Salvatore Lepore
    • C07C309/77C07C309/89C07D323/00C07H11/00
    • C07H11/00C07C309/77C07C309/89C07C2603/74C07D323/00
    • Sulfonate leaving groups include a cation chelating moiety, e.g. a polyether or crown ether. The chelating moiety stabilizes the sulfonate leaving group by forming a complex with a cation of a cation-nucleophile combination. The stabilized leaving group is more easily displaced under many conditions than are standard arylsulfonate leaving groups such as the toxyl group. The chelating moiety also favors certain cations depending on the identity of the moiety thereby enhancing the reaction rate with nucleophilic salts containing the preferred cation. Use of the inventive leaving groups results in improved yields, decreased reaction times and improved product purity.
    • 磺酸盐离去基团包括阳离子螯合部分,例如 聚醚或冠醚。 螯合部分通过与阳离子 - 亲核试剂组合的阳离子形成络合物来稳定磺酸根离去基团。 稳定的离去基团在许多条件下比标准芳基磺酸盐离去基团如甲苯磺酰基更容易置换。 取决于部分的同一性,螯合部分也有利于某些阳离子,从而增强与含有优选阳离子的亲核盐的反应速率。 使用本发明的离去基团导致产率提高,反应时间缩短,产物纯度提高。
    • 6. 发明授权
    • Process for the preparation of aromatic sulfonyl chlorides
    • 芳香族磺酰氯的制备方法
    • US5136043A
    • 1992-08-04
    • US746476
    • 1991-08-16
    • Michael MeierWolfgang Tronich
    • Michael MeierWolfgang Tronich
    • C07C303/08C07C309/86C07C309/88C07C309/89C07D263/58
    • C07D263/58C07C303/08C07C303/22
    • A process for the preparation of aromatic sulfonyl chlorides of the formula I ##STR1## in which R.sub.1, R.sub.2 and R.sub.3 are identical or different and are hydrogen, fluorine, chlorine, bromine or iodine atoms, alkyl(C.sub.1 -C.sub.4), acetamido, nitro or carboxyl groups, or R.sub.1 and R.sub.2 together form an aromatic or heteroaromatic ring having 5 or 6 ring members, which can be substituted by fluorine, chlorine, bromine or iodine atoms, alkyl(C.sub.1 -C.sub.4), acetamido, nitro or carboxyl groups, by reaction of aromatic compounds of the formula II ##STR2## in which R.sub.1, R.sub.2 and R.sub.3 have the abovementioned meanings, with chlorosulfonic acid in excess or with chlorosulfonic acid or oleum and thionyl chloride, by reacting in the presence of sulfamic acid as a catalyst.
    • 其中R1,R2和R3相同或不同,为氢,氟,氯,溴或碘原子的芳基磺酰氯的方法,其中R1,R2和R3为氢,氟,氯,溴或碘原子,烷基(C1-C4),乙酰氨基,硝基 或羧基,或R 1和R 2一起形成具有5或6个环成员的芳族或杂芳族环,其可被氟,氯,溴或碘原子取代,烷基(C1-C4),乙酰氨基,硝基或羧基, 通过在氨基磺酸作为催化剂的存在下反应,通过在氨基磺酸作为催化剂的存在下反应,其中R1,R2和R3具有上述含义的芳族化合物与氯磺酸过量或与氯磺酸或发烟硫酸和亚硫酰氯反应 。