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    • 6. 发明授权
    • Process for producing benzopyran carboxamide
    • 苯并吡喃甲酰胺的制备方法
    • US06653488B2
    • 2003-11-25
    • US10214397
    • 2002-08-08
    • Takeo KomataMatsue KawamuraNariaki Ii
    • Takeo KomataMatsue KawamuraNariaki Ii
    • C07D31158
    • C07D311/58
    • A first process for producing a benzopyran carboxamide represented by the general formula [1] includes reacting 3-aminopropionitrile.½ sulfate, N≡CCH2CH2NH2.½(H2SO4), with a benzopyran carboxylic halide represented by the general formula [2], in the presence of a base. A second process for producing the benzopyran carboxamide includes the steps of (a) reacting 3-aminopropionitrile.½ sulfate with a base, thereby forming 3-aminopropionitrile; and (b) reacting the 3-aminopropionitrile with the benzopyran carboxylic halide [2], thereby producing the benzopyran carboxamide. A process for stabilizing 3-aminopropionitrile includes turning the 3-aminopropionitrile into a sulfate of the 3-aminopropionitrile. where R is a straight-chain or non-straight-chain perfluoroalkyl group represented by CnF2n+1 where n is an integer of 1-10; and X is fluorine, chlorine, bromine or iodine.
    • 用于制备由通式[1]表示的苯并吡喃甲酰胺的第一种方法包括使3-氨基丙腈1/2硫酸盐,N = CCH 2 CH 2 NH 2 1/2(H 2 SO 4)与由通式[2]表示的苯并吡喃羧酸卤化物反应 存在基地 制备苯并吡喃甲酰胺的第二种方法包括以下步骤:(a)使3-氨基丙腈1/2硫酸酯与碱反应,从而形成3-氨基丙腈; 和(b)使3-氨基丙腈与苯并吡喃羧酸卤化物[2]反应,从而产生苯并吡喃甲酰胺。 稳定3-氨基丙腈的方法包括将3-氨基丙腈转化为3-氨基丙腈的硫酸盐。其中R是由C n F 2n + 1表示的直链或非直链全氟烷基,其中n是1- 10; X是氟,氯,溴或碘。