Process for preparing 4-arylamino-benzopyran and related compounds
    4.
    发明授权
    Process for preparing 4-arylamino-benzopyran and related compounds 失效
    4-芳基氨基 - 苯并吡喃及相关化合物的制备方法

    公开(公告)号:US5629429A

    公开(公告)日:1997-05-13

    申请号:US486111

    申请日:1995-06-07

    CPC分类号: C07D405/12 C07D493/04

    摘要: A method of preparing compounds of the formula ##STR1## and pharmaceutically acceptable salts thereof which comprises converting a compound of the formula ##STR2## where the R.sup.2 substituent contains a hydrogen atom which is more acidic than the starred (*) hydrogen atom in formula II, to the corresponding dianion of formula ##STR3## where M is a counterion preferably lithium or magnesium, using two equivalents of a base in an inert solvent such as tetrahydrofuran; then reacting compounds of formula IIA with an epoxide of formula ##STR4## to produce the compounds of formula I.

    摘要翻译: 制备式I化合物及其药学上可接受的盐的方法,其包括转化式II化合物,其中R 2取代基含有比在星形(*)氢原子中酸性更高的氢原子 式Ⅱ与相应的式IIA的二价阴离子,其中M为抗衡离子优选为锂或镁,在惰性溶剂如四氢呋喃中使用2当量碱; 然后使式IIA的化合物与式III的环氧化物反应以制备式I的化合物。