Preparation of 2-imidazolines
    2.
    发明授权
    Preparation of 2-imidazolines 失效
    2-咪唑啉的制备

    公开(公告)号:US4340745A

    公开(公告)日:1982-07-20

    申请号:US242011

    申请日:1981-03-09

    CPC分类号: C07D233/06

    摘要: 2-Imidazolines are prepared by reacting N,N'-diformyl-1,2-diamines in the gas phase at 200.degree.-350.degree. C., in the presence of certain amounts of an inert gas, over zinc oxide of a particular structure or over a mixture of this zinc oxide and aluminum oxide, as the catalyst.The 2-imidazolines obtainable by the process according to the invention are valuable starting materials for the preparation of dyes, crop protection agents and drugs.

    摘要翻译: 2-甲苯胺是通过使N,N'-二甲酰基-1,2-二胺在气相中在200-350℃下,在特定结构的氧化锌存在下,在一定量的惰性气体存在下, 或者该氧化锌和氧化铝的混合物,作为催化剂。 通过根据本发明的方法可获得的2-咪唑啉是制备染料,作物保护剂和药物的有价值的原料。

    Preparation of 2-alkyl-4,5-dihydroxymethylimidazoles
    3.
    发明授权
    Preparation of 2-alkyl-4,5-dihydroxymethylimidazoles 失效
    2-烷基-4,5-二羟甲基咪唑的制备

    公开(公告)号:US4658035A

    公开(公告)日:1987-04-14

    申请号:US754852

    申请日:1985-07-12

    IPC分类号: C07D233/54 C07D233/64

    CPC分类号: C07D233/64

    摘要: 2-Alkyl-4,5-dihydroxymethyl-imidazoles of the formula ##STR1## where R is alkyl, are prepared by a process in which an imidazole of the formula ##STR2## is reacted with not less than 2 moles of formaldehyde in the presence of a base.

    摘要翻译: 通过其中式II的咪唑与不小于2摩尔的甲醛反应的方法制备其中R是烷基的式I的2-烷基-4,5-二羟基甲基 - 咪唑,其中R是烷基, 一个基地的存在。

    Preparation of imidazole-4(5)-monocarboxylic acids and their salts or
betaines
    5.
    发明授权
    Preparation of imidazole-4(5)-monocarboxylic acids and their salts or betaines 失效
    咪唑-4(5) - 单羧酸及其盐或甜菜碱的制备

    公开(公告)号:US4672128A

    公开(公告)日:1987-06-09

    申请号:US758303

    申请日:1985-07-24

    CPC分类号: C07D233/90

    摘要: Imidazole-4(5)-monocarboxylic acids and their salts or betaines are prepared by reacting an imidazole with carbon dioxide and an alkali metal carbonate, an alkali metal bicarbonate and/or an alkali metal hydroxide at from 140.degree. to 230.degree. C. and under from 2 to 350 bar and, if desired, then reacting the product with an acid.The imidazole-4(5)-monocarboxylic acids which can be prepared by the process of the invention are useful starting materials for the preparation of dyes, crop protection agents and drugs.

    摘要翻译: 咪唑-4(5) - 单羧酸及其盐或甜菜碱通过咪唑与二氧化碳和碱金属碳酸盐,碱金属碳酸氢盐和/或碱金属氢氧化物在140-230℃下反应制备, 在2至350巴下,如果需要,然后使产物与酸反应。 可通过本发明方法制备的咪唑-4(5) - 单羧酸是用于制备染料,作物保护剂和药物的起始材料。

    Preparation of 4(5)-nitroimidazole-5(4)-carboxylic acids
    6.
    发明授权
    Preparation of 4(5)-nitroimidazole-5(4)-carboxylic acids 失效
    4(5) - 硝基咪唑-5(4) - 羧酸的制备

    公开(公告)号:US4803283A

    公开(公告)日:1989-02-07

    申请号:US126867

    申请日:1987-11-30

    IPC分类号: C07D233/92 C07D233/91

    CPC分类号: C07D233/92

    摘要: 4(5)-nitroimidazole-5(4)-carboxylic acids are prepared by reacting an imidazole-4(5)-carboxylic acid with a mixture of sulfuric acid and nitric acid at not less than 80.degree. C., the water content of the reaction mixture at the beginning of the reaction being no higher than 5% by weight, based on the reaction mixture.

    摘要翻译: 通过使咪唑-4(5) - 羧酸与硫酸和硝酸的混合物在不低于80℃下反应制备4(5) - 硝基咪唑-5(4) - 羧酸, 基于反应混合物,反应开始时的反应混合物不高于5重量%。