Preparation of 5-hydroxymethylimidazoles
    3.
    发明授权
    Preparation of 5-hydroxymethylimidazoles 失效
    5-羟甲基咪唑的制备

    公开(公告)号:US4278801A

    公开(公告)日:1981-07-14

    申请号:US119959

    申请日:1980-02-08

    IPC分类号: C07D233/54 C07D233/64

    CPC分类号: C07D233/64

    摘要: A process for the manufacture of 5-hydroxymethylimidazoles by reaction of an imidazole with formaldehyde or an oligomer of formaldehyde in aqueous hydrochloric acid solution containing from 5 to 18% by weight of hydrogen chloride, at from 80.degree. to 160.degree. C., if desired in a closed system under pressure, followed by isolation in the form of its hydrochloride of the 5-hydroxymethylimidazole obtained.

    摘要翻译: 如果需要,通过咪唑与甲醛或甲醛的低聚物在含有5至18重量%的氯化氢的盐酸水溶液中反应制备5-羟基甲基咪唑的方法,如果需要 在密闭系统中加压,然后以所得的5-羟基甲基咪唑盐酸盐的形式分离。

    Preparation of 2-imidazolines
    6.
    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。

    Production of 1-alkyl-5-nitroimidazoles
    7.
    发明授权
    Production of 1-alkyl-5-nitroimidazoles 失效
    1-烷基-5-硝基咪唑的制备

    公开(公告)号:US4021442A

    公开(公告)日:1977-05-03

    申请号:US557270

    申请日:1975-03-11

    IPC分类号: C07D233/92

    CPC分类号: C07D233/92

    摘要: 1-Alkyl-5-nitroimidazoles are prepared by reacting a 5-nitroimidazole with an alkylating agent in the presence of an aliphatic carboxylic acid. The products are intermediates for the production of dyes, textiles auxiliaries and insecticides.

    摘要翻译: 1-烷基-5-硝基咪唑通过在脂肪族羧酸存在下使5-硝基咪唑与烷基化剂反应来制备。 该产品是生产染料,纺织助剂和杀虫剂的中间体。

    Preparation of imidazole-4(5)-monocarboxylic acids and their salts or
betaines
    8.
    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 1-alkylimidazoles
    9.
    发明授权
    Preparation of 1-alkylimidazoles 失效
    1-烷基咪唑的制备

    公开(公告)号:US4864030A

    公开(公告)日:1989-09-05

    申请号:US238121

    申请日:1988-08-30

    IPC分类号: C07D233/90

    CPC分类号: C07D233/90

    摘要: Process for the preparation of 1-alkylimidazoles of the general formula (I) ##STR1## where R.sup.1 is alkyl, R.sup.2 and R.sup.3 are hydrogen, alkyl, aryl, arylalkyl, or alkylaryl, R.sup.4 is carboxy, alkoxycarbonyl R.sup.5 OCC--, carbamoyl, or cyano, and R.sup.5 is an alkyl of from 1 to 8 carbon atoms--by the reaction of imidazoles of the general formula (II) ##STR2## with dialkyl sulfates of the general formula (III)(R.sup.1 O).sub.2 SO.sub.2 (III)at elevated temperatures in the presence of a carboxylic acid or anhydride or of both acid and anhydride.

    摘要翻译: 制备通式(I)的1-烷基咪唑的方法其中R 1是烷基,R 2和R 3是氢,烷基,芳基,芳基烷基或烷基芳基,R 4是羧基,烷氧基羰基,R 5 OCC - ,氨基甲酰基 ,或氰基,R 5是1至8个碳原子的烷基 - 通式(II)的咪唑与(II)的二烷基硫酸盐(R 1 O)2 SO 2( III)在羧酸或酸酐或酸和酸酐的存在下在升高的温度下进行。

    Preparation of 2-alkyl-4,5-dihydroxymethylimidazoles
    10.
    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。