Process for making 6-aryl-2-methyl pyridines
    1.
    发明公开
    Process for making 6-aryl-2-methyl pyridines 失效
    Verfahren zur Herstellung von 6-Aryl-2-methyl-pyridinen。

    公开(公告)号:EP0244130A2

    公开(公告)日:1987-11-04

    申请号:EP87303372.4

    申请日:1987-04-16

    摘要: A process for making certain 6-aryl-2-methyl-pyridines, which are useful intermediates in the preparation of biologically active compounds, comprises

    (a) subjecting a ketal of 1-hydroxy-1-aryl-5-hexanone to a Jones oxidation to yield a 1-aryl-1,5-hexanedione; or treating the 1-aryl-1-hydroxy-5-ketal-hexane with manganese dioxide in solvent to yield a ketone; and
    (b) reacting the 1-aryl-1,5-hexanedione or the ketone from (a) with excess hydroxylamine hydrochloride in polar solvent at a temperature of from 50°C to 100°C.

    摘要翻译: 制备某些6-芳基-2-甲基 - 吡啶的方法,其在制备生物活性化合物中是有用的中间体,包括(a)使1-羟基-1-芳基-5-己酮的缩酮进行琼斯氧化 得到1-芳基-1,5-己二酮; 或用二氧化锰在溶剂中处理1-芳基-1-羟基-5-缩酮 - 己烷,得到酮; 和(b)使1-芳基-1,5-己二酮或来自(a)的酮与过量的羟胺盐酸盐在极性溶剂中在50℃至100℃的温度下反应。