Preparation of benzoic acid ortho-esters and novel compounds of this type
    3.
    发明授权
    Preparation of benzoic acid ortho-esters and novel compounds of this type 失效
    制备苯甲酸原酸酯和这种新型化合物

    公开(公告)号:US4699698A

    公开(公告)日:1987-10-13

    申请号:US895171

    申请日:1986-08-11

    CPC分类号: C07C43/32 C25B3/02

    摘要: Preparation of aromatic carboxylic acid ortho-esters of the formula I ##STR1## where R is C.sub.1 -C.sub.4 -alkyl and R.sup.1 is H, halogen, alkyl, aryl, heteroaryl, alkoxy, aryloxy, acyl, acyloxy or CN, by electro-oxidizing benzene derivatives of the formula II ##STR2## where R.sup.2 is CH.sub.3 or CH(OR.sub.2), in the presence of an alcohol ROH, a halogenated triarylamine compound and a base, and novel ortho-trialkyl 4-tert-butoxybenzoates, where alkyl is of 1 to 4 carbon atoms.Ortho-trialkyl 4-tert-butoxybenzoates are scents and are also used to prepared p-hydroxybenzoic acid esters.

    摘要翻译: 其中R是C 1 -C 4 - 烷基且R 1是H,卤素,烷基,芳基,杂芳基,烷氧基,芳氧基,酰基,酰氧基或CN的芳族羧酸原酸, 在醇ROH,卤代三芳基胺化合物和碱的存在下,氧化式II的苯衍生物,其中R 2是CH 3或CH(OR 2),和新的邻位三叔丁基4-叔丁氧基苯甲酸酯,其中烷基 具有1至4个碳原子。 4-叔丁氧基苯甲酸正三烷基酯是气味,也用于制备对羟基苯甲酸酯。