Imidazoles and 2-alkyl imidazoles and method for their manufacture
    3.
    发明授权
    Imidazoles and 2-alkyl imidazoles and method for their manufacture 失效
    咪唑和2-烷基咪唑及其制备方法

    公开(公告)号:US4074054A

    公开(公告)日:1978-02-14

    申请号:US672493

    申请日:1976-03-31

    CPC分类号: C07D233/54

    摘要: The method is for manufacturing imidazoles corresponding to the general formula: ##STR1## in which R represents hydrogen or an alkyl radical of 1 to 17 carbon atoms. Glyoxal is condensed with an aliphatic aldehyde and ammonia, in a hydroalcoholic medium at a pH comprised between 6 and 8. The glyoxal is in the form of its bisulfite combination and the ammonia being supplied by an ammonium salt of a weak acid.

    摘要翻译: 该方法用于制备相应于下列通式的咪唑:其中R表示氢或1至17个碳原子的烷基。 乙二醛与脂肪醛和氨在pH为6至8的水醇介质中缩合。乙二醛为亚硫酸氢盐的组合形式,氨由弱酸的铵盐提供。

    Process for the preparation of
(+/-)3-(3,4-dichlorophenyl)-2-dimethylamino-2-methylpropan-1-OL or
cericlamine (INN)
    4.
    发明授权
    Process for the preparation of (+/-)3-(3,4-dichlorophenyl)-2-dimethylamino-2-methylpropan-1-OL or cericlamine (INN) 失效
    制备(+/-)3-(3,4-二氯苯基)-2-二甲基氨基-2-甲基丙-1-醇或十六烷胺(INN)的方法

    公开(公告)号:US6121491A

    公开(公告)日:2000-09-19

    申请号:US381118

    申请日:1999-12-20

    摘要: Process for the preparation of cericlamine which consists: i) in arylating methacrylic acid with the diazonium chloride of 3,4-dichloroaniline, to obtain (+/-)2-chloro-3-(3,4-dichlorophenyl)-2-methylpropionic acid, ii) in aminating the acid with dimethylamine, to obtain (+/-)3-(3,4-dichlorophenyl)-2-dimethylamino-2-methylpropionic acid, or an alkaline metal salt thereof, iii) in esterifying the amino-acid or its salt, then, iv) in reducing the ester by a metal or organometal hydride to obtain (+/-)3-(3,4-dichlorophenyl)-2-dimethylamino-2-methyl-propan-1-ol.

    摘要翻译: PCT No.PCT / EP98 / 02213 371 1999年12月20日第 102(e)日期1999年12月20日PCT提交1998年4月6日PCT公布。 公开号WO98 / 45248 日期1998年10月15日制备铈胺的方法,其包括:i)在甲基丙烯酸中与3,4-二氯苯胺的重氮氯化物进行芳基化,得到(+/-)2-氯-3-(3,4-二氯苯基 )-2-甲基丙酸,ii)用二甲胺胺化酸,得到(+/-)3-(3,4-二氯苯基)-2-二甲基氨基-2-甲基丙酸或其碱金属盐,iii )中,然后iv)在金属或有机金属氢化物还原酯时,得到(+/-)3-(3,4-二氯苯基)-2-二甲基氨基-2-甲基 - 丙-1-醇

    Method for the resolution of chiral hydantoins
    6.
    发明授权
    Method for the resolution of chiral hydantoins 失效
    拆分手性乙内酰脲的方法

    公开(公告)号:US5326878A

    公开(公告)日:1994-07-05

    申请号:US910184

    申请日:1992-07-21

    CPC分类号: C07D233/74

    摘要: Method of resolution of chiral hydantoins of the general formula I ##STR1## in which: R.sub.1 designates a lower alkyl radical comprising 1 to 5 carbon atoms in linear or branched chain,R.sub.2 designates a phenyl radical, possibly mono-, di-, or tri-substituted by lower alkyl or alkoxy radicals or halogen atoms, whether identical of different, or a heteroaryl radical containing a ring of 5 to 7 members in which the sole hetero atom is nitrogen, oxygen or sulfur, or else an aralkyl radical the alkyl part of which comprises one or two carbon atoms and the aryl ring is a phenyl group possibly mono-, di- or tri-substituted by radicals which are lower alkyl or alkoxy radicals or halogen atoms, whether identical or different. The hydantoin (I) to be resolved is dissolved in an alcohol or an alkaline solution, and an enantiomer of .alpha.-methylbenzyl-amine is added in a defined proportion to the solution obtained, whereupon the diastereoisomeric salt obtained is isolated and treated with an acid solution in order to crystallize the enantiomer of hydantoin (I).

    摘要翻译: PCT No.PCT / FR91 / 00906 Sec。 371日期:1992年7月21日 102(e)日期1992年7月21日PCT 1991年11月15日PCT PCT。 出版物WO92 / 08702 日期:1992年5月29日。解决通式I(I)的手性乙内酰脲的方法,其中:R1表示直链或支链含有1至5个碳原子的低级烷基,R2表示苯基, 可能被低级烷基或烷氧基或卤素原子单取代,二取代或三取代,无论是否相同,或含有5至7个成员的杂环基,其中唯一杂原子是氮,氧或硫 ,或者其烷基部分包含一个或两个碳原子的芳烷基,芳环是可能被低级烷基或烷氧基或卤原子的基团单,二或三取代的苯基,无论相同 或不同。 将待分解的乙内酰脲(I)溶于醇或碱性溶液中,并将α-甲基苄基胺的对映异构体以规定的比例加入到所获得的溶液中,由此分离所得的非对映异构体盐并用酸处理 溶液以使乙内酰脲(I)的对映异构体结晶。