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    • 12. 发明授权
    • One step conversion of epoxyalkanes to alkyl esters of alkyl and aryl
sulfonic acids
    • 将环氧烷烃一步转化为烷基和芳基磺酸的烷基酯
    • US4645852A
    • 1987-02-24
    • US776244
    • 1985-09-16
    • Lennon H. McKendryRichard C. Krauss
    • Lennon H. McKendryRichard C. Krauss
    • C07C33/22C07C33/46C07C233/00C07C309/63C07C143/68C07C103/22
    • C07C309/00
    • In an improved process of converting a 1,2-epoxy-2-phenylbutane or a 1,2-epoxy-2-phenylpentane to a 2-hydroxy-2-phenylbutylsulfonate, sulfamate, or halide, or the corresponding 2-hydroxy-2-phenylpentyl compound, respectively, by the reaction at about 40.degree. to 120.degree. C. in the presence of an organic solvent of the requisite epoxybutane or epoxypentane with a proton source and a nucleophile. The proton source can be a free strong acid such as a sulfonic, sulfamic acid, or hydrohalide acid, or the proton source can be derived from an equilibrium system comprising a free strong acid and weak base in equilibrium with the respective deprotonated strong acid and protonated weak base. The process is carried out in one step with reduction or avoidance of aldehyde formation by rearrangement of the epoxyalkane.
    • 在将1,2-环氧-2-苯基丁烷或1,2-环氧-2-苯基戊烷转化为2-羟基-2-苯基丁基磺酸盐,氨基磺酸盐或卤化物或相应的2-羟基-2 - 苯基戊基化合物分别通过在约40-120℃下在需要的环氧丁烷或环氧戊烷的有机溶剂与质子源和亲核试剂的存在下反应。 质子源可以是游离的强酸如磺酸,氨基磺酸或氢卤酸,或者质子源可以衍生自包含游离强酸和弱碱的平衡体系,与相应去质子化的强酸和质子化的 弱碱。 该方法在一个步骤中进行,通过环氧烷烃的重排减少或避免形成醛。