Processes for producing 4,6-bis (substituted)phenylazoresorcinols
    1.
    发明授权
    Processes for producing 4,6-bis (substituted)phenylazoresorcinols 失效
    生产4,6-双(取代)苯基次氮杂环戊烯的方法

    公开(公告)号:US5962740A

    公开(公告)日:1999-10-05

    申请号:US66335

    申请日:1998-04-28

    IPC分类号: C07C245/08 C07C213/02

    CPC分类号: C07C245/08

    摘要: A process for producing 4,6-bisphenylazoresorcinol of formula �2! wherein R represents halogen atom, C.sub.1-5 alkyl group, hydroxycarbonyl or C.sub.1-5 alkoxy group, n represents 0 or an integer of 1 to 5, and two or more Rs are the same or different from each other, which comprises reacting resorcinol with a benzenediazonium salt of formula �1! wherein R and n are the same as defined in the above formula �1!, and X represents Cl, Br, OSO.sub.3 H or OPO.sub.3 H.sub.2, in an alkaline solvent, characterized in that (a) a solution of the compound of the formula �1! is mixed with a solution or suspension of an alkali metal or alkaline earth metal hydroxide to obtain an alkaline mixture, and this alkaline mixture is mixed to be reacted with a solution or suspension containing resorcinol and/or its alkali metal salt or alkaline earth metal salt, or (b) a solution of the compound of formula �1! is mixed to be reacted with a solution or suspension of a mixture of resorcinol with its alkali metal hydroxide or alkaline earth metal hydroxide 15 to 40 times by mol as much as the resorcinol. By the above-described method, the reaction volume can be reduced as compared with the conventional processes, and 4,6-bisphenylazoresorcinol can be obtained in high yield.

    摘要翻译: PCT No.PCT / JP96 / 03199 Sec。 371日期:1998年4月28日 102(e)1998年4月28日PCT PCT 1996年10月31日PCT公布。 第WO97 / 16411号公报 日期1997年5月9日制备式[2]的4,6-双苯​​并苯并氮杂酚的方法,其中R表示卤素原子,C 1-5烷基,羟基羰基或C 1-5烷氧基,n表示0或1〜5的整数, 两个或多个Rs相同或不同,其包括使间苯二酚与式[1]的苯二氮鎓盐反应,其中R和n与上式[1]中定义相同,X表示Cl,Br, OSO 3 H或OPO 3 H 2,在碱性溶剂中,其特征在于:(a)式[1]化合物的溶液与碱金属或碱土金属氢氧化物的溶液或悬浮液混合,得到碱性混合物, 将碱性混合物与含有间苯二酚和/或其碱金属盐或碱土金属盐的溶液或悬浮液混合,或(b)将式[1]化合物的溶液与溶液或溶液反应,或 间苯二酚与其碱金属氢氧化物的混合物悬浮 de或碱土金属氢氧化物为间苯二酚的15〜40倍摩尔。 通过上述方法,与常规方法相比可以降低反应体积,可以高产率获得4,6-双苯​​并氮杂间苯二酚。