Process for preparing 2,4-dihydroxyphenyl 4-methoxybenzyl ketones
    7.
    发明授权
    Process for preparing 2,4-dihydroxyphenyl 4-methoxybenzyl ketones 有权
    制备2,4-二羟基苯基4-甲氧基苄基酮的方法

    公开(公告)号:US08324431B2

    公开(公告)日:2012-12-04

    申请号:US12525023

    申请日:2008-02-16

    IPC分类号: C07C49/00 C07D311/00

    CPC分类号: C07C45/46 C07C49/83 C07C49/84

    摘要: The invention relates to a process for preparing 2,4-dihydroxyphenyl 4-methoxybenzyl ketones of the formula (I) by Friedel-Crafts acylation in hydrogen fluoride (HF).2,4-Dihydroxyphenyl 4-methoxybenzyl ketones of the formula (I) in which R1 and R2 are each hydrogen, chlorine, fluorine, bromine, iodine, CF3, methyl, optionally substituted alkoxy, —OCF3, —C(CH3)3, —CH2(CH3)2, —CH(CH3)2, R3 is hydrogen, Cl, F, Br, optionally substituted alkyl, optionally substituted alkoxy, —C(CH3)3, and X is hydroxyl, F, Cl, Br, optionally substituted alkoxy, are obtained in high yield and high purity by reacting phenylacetic acid derivatives of the formula (II) with phenols of the formula (III) in liquid hydrogen fluoride (HF).

    摘要翻译: 本发明涉及通过在氟化氢(HF)中弗瑞德 - 克来福特酰化制备式(I)的2,4-二羟基苯基4-甲氧基苄基酮的方法。 式(I)的2,4-二羟基苯基4-甲氧基苄基酮,其中R 1和R 2各自为氢,氯,氟,溴,碘,CF 3,甲基,任选取代的烷氧基,-OCF 3,-C(CH 3) -CH 2(CH 3)2,-CH(CH 3)2,R 3是氢,Cl,F,Br,任选取代的烷基,任选取代的烷氧基,-C(CH 3)3,X是羟基,F,Cl,Br, 通过使式(II)的苯乙酸衍生物与式(III)的酚在液体氟化氢(HF)中反应,以高产率和高纯度获得任选取代的烷氧基。

    METHOD FOR PRODUCING DIHALO ACETOACETIC ALKYL ESTERS
    9.
    发明申请
    METHOD FOR PRODUCING DIHALO ACETOACETIC ALKYL ESTERS 有权
    生产二羟基乙酰氨基酸酯的方法

    公开(公告)号:US20100121095A1

    公开(公告)日:2010-05-13

    申请号:US12524923

    申请日:2008-01-22

    IPC分类号: C07C69/72

    CPC分类号: C07C67/343 C07C69/716

    摘要: The invention relates to a process for preparing alkyl dihaloacetoacetates of the formula (I) by reacting α,α-dihaloamines of the formula (III) with acetic esters of the formula (II) in the presence of bases.

    摘要翻译: 本发明涉及通式(Ⅲ)的α,α-二卤代胺与式(Ⅱ)的乙酸酯在碱的存在下反应来制备式(Ⅰ)的二卤代乙酸的烷基酯的方法。