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    • 3. 发明授权
    • Process for preparing aromatic methylene-dioxy compounds
    • 制备芳族亚甲基二氧化合物的方法
    • US4183861A
    • 1980-01-15
    • US764424
    • 1977-01-31
    • Paolo Maggioni
    • Paolo Maggioni
    • B01J31/00C07B61/00C07D317/50C07D317/44
    • C07D317/50
    • A method for preparing aromatic methylenedioxybenzene products which are optionally substituted in the aromatic ring by alkyl, aldehydo, carboxy, alkoxy, halo or nitro moieties; which comprises treating the corresponding dihydroxybenzene with methylene chloride in the presence of a catalyst selected from among ammonium, phosphonium or arsonium chlorides and bromides. The reaction is conducted in the aqueous phase in the presence of a suitable base, such as a sodium derivative to form a sodium salt of the dihydroxybenzene reactant.The aromatic methylenedioxy products of this invention are known compounds which are used in the chemical, pharmaceutical and cosmetic industries and they have utility as intermediates in the preparation of other known compounds.
    • 芳香族亚甲二氧基苯产物的制备方法,其任选在芳环中被烷基,醛,羧基,烷氧基,卤素或硝基部分取代; 其包括在选自铵,鏻或氯化钪和溴化物的催化剂存在下用二氯甲烷处理相应的二羟基苯。 反应在水相中,在合适的碱如钠衍生物的存在下进行,形成二羟基苯反应物的钠盐。 本发明的芳族亚甲二氧基产物是用于化学,制药和化妆品工业中的已知化合物,它们可用作制备其它已知化合物的中间体。