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    • 1. 发明授权
    • Production intermediate and process for producing pyridine derivative
    • 制备吡啶衍生物的中间体和方法
    • US5734059A
    • 1998-03-31
    • US809467
    • 1994-03-20
    • Syotaro WatanabeWilliam R. KemHun Ju LeeMakoto KajitaniKazuo Maruhashi
    • Syotaro WatanabeWilliam R. KemHun Ju LeeMakoto KajitaniKazuo Maruhashi
    • C07D213/80A61K31/44A61K31/4425A61K31/4427A61P25/00A61P25/28C07D213/50C07D401/04C07D401/06
    • C07D401/04C07D213/50C07D401/06
    • This invention relates to: (1) a compound represented by the formula (V), its tautomer and a mixture of the same; (2) a process for producing the compound represented by the above-mentioned formula (V), its tautomer or a mixture of the same, which comprises reacting N-vinylpiperidone represented by the formula (I) with a nicotinate represented by the formula (II), wherein R represents a lower alkyl group, in the presence of a sodium alkoxide; (3) a process for producing a pyridine derivative represented by the formula (III), which comprises producing the compound represented by the formula (V), its tautomer or a mixture of the same by the process as described in the above (2), and then treating the obtained compound with an acid; and (4) a process for producing a pyridine derivative represented by the formula (IV), in which the treatment with an acid as described in the above (3) is followed by another treatment with a base. Thus, the present invention provides industrial processes for producing pyridine derivatives represented by the formulae (III) and (IV) safely, economically, easily and efficiently without using any hazardous reagents. ##STR1##
    • PCT No.PCT / JP95 / 01911 Sec。 371日期1997年3月20日 102(e)1997年3月20日PCT PCT 1995年9月21日PCT公布。 公开号WO96 / 09300 日期:1996年3月28日本发明涉及:(1)由式(V)表示的化合物,其互变异构体及其混合物; (2)由上述式(V)表示的化合物,其互变异构体或其混合物的制备方法,其包括将由式(I)表示的N-乙烯基哌啶酮与式(I)表示的烟酸酯反应, II),其中R表示低级烷基,在醇盐存在下; (3)制备由式(III)表示的吡啶衍生物的方法,其包括通过上述(2)中所述的方法制备由式(V)表示的化合物,其互变异构体或其混合物, 然后用酸处理得到的化合物; 和(4)由式(IV)表示的吡啶衍生物的制造方法,其中用上述(3)所述的酸处理后,用碱进行另外的处理。 因此,本发明提供了在不使用任何有害试剂的情况下安全,经济,容易且有效地生产由式(III)和(IV)表示的吡啶衍生物的工业方法。 (I)(I)))))))))))))))))))))))))))