Intermediates for the synthesis of carboxylic acids
    43.
    发明授权
    Intermediates for the synthesis of carboxylic acids 失效
    用于合成羧酸的中间体

    公开(公告)号:US4824970A

    公开(公告)日:1989-04-25

    申请号:US891348

    申请日:1986-07-31

    CPC分类号: C07D317/34 C07C51/00

    摘要: Compounds are described of formula ##STR1## in which: Ar represents a aryl, possibly substituted;R represents a C.sub.1 -C.sub.4 alkyl;R' represents a hydroxyl, an alkoxy, an amino group possibly mono or di-alkyl substituted, or an O-M+ group where M+ represents the cation of an alkaline metal;X represents a hydrogen, chlorine, bromine or iodine atom, a hydroxyl, or an acyloxy, alkylsulphonyloxy or arylsulphonyloxy group.The compounds of formula I can be easily transformed into alphaarylalkanoic acids of formula ##STR2## in which Ar and R have the aforesaid meanings.

    摘要翻译: 化合物描述为式(I),其中:Ar表示可能被取代的芳基; R代表C1-C4烷基; R'表示羟基,烷氧基,可能单或二烷基取代的氨基,或者M +表示碱金属阳离子的O-M +基团; X表示氢,氯,溴或碘原子,羟基或酰氧基,烷基磺酰氧基或芳基磺酰氧基。 式I化合物可以容易地转化成其中Ar和R具有上述含义的式(III)的α-芳基链烷酸。

    Process for the preparation of
4-[2-(dimethylamino)-ethoxy]2-methyl-5-(1-methylethyl)-phenol esters
and their salts
    50.
    发明授权
    Process for the preparation of 4-[2-(dimethylamino)-ethoxy]2-methyl-5-(1-methylethyl)-phenol esters and their salts 失效
    制备4- [2-(二甲基氨基) - 乙氧基] -2-甲基-5-(1-甲基乙基) - 苯酯及其盐的方法

    公开(公告)号:US4336396A

    公开(公告)日:1982-06-22

    申请号:US212796

    申请日:1980-12-04

    CPC分类号: C07C217/20

    摘要: This invention relates to a process for the preparation of 4-[2-(dimethylamino)-ethoxy]-2-methyl-5-(1-methylethyl)-phenol esters (I) and their salts with organic and inorganic acids comprising the reaction of thymol with a salt of an 1-halo-dimethylaminoethane to obtain ethylamine-N,N-dimethyl-2-(thymyloxy) (II), the subsequent reaction of (II) with an acylating agent according to the Friedel and Kraft reaction to obtain 4-[2-(dimethylamino)-ethoxy]-2-methyl-5-(1-methylethyl)-1-acyl-benzene (III) and the oxidation of (III) to obtain the products (I) which, if desired, may be transformed in their salts with organic or inorganic acids.This process allows to obtain the products (I) in high quality and quantity without isolating any intermediate product.

    摘要翻译: 本发明涉及一种制备4- [2-(二甲基氨基) - 乙氧基] -2-甲基-5-(1-甲基乙基) - 苯酯(I)的方法及其与包含反应的有机和无机酸的盐 的麝香草酚与1-卤代 - 二甲基氨基乙烷的盐反应,得到乙胺-N,N-二甲基-2-(胸甲氧基)(II),随后根据Friedel和Kraft反应将酰化剂(II)与 得到4- [2-(二甲基氨基) - 乙氧基] -2-甲基-5-(1-甲基乙基)-1-酰基 - 苯(III)和氧化(III)得到产物(I) 所需的,可以用有机或无机酸转化成它们的盐。 该方法允许以高质量和数量的方式获得产品(I),而不隔离任何中间产物。