申请人:SMITH KLINE & FRENCH LABORATORIES
LIMITED
公开号:EP0092903A2
公开(公告)日:1983-11-02
The invention provides a process for preparing a compound of formula (II):-
where R3 and R4 are the same or different and are hydrogen, C1-4, alkyl, C1-4, alkoxy, amino or nitro and n is from 2 to 5 which comprises reacting an alkali metal derivative of a compound of formula (III) :-
where R3 and R4 are as defined with reference to formula (II) with a compound of formula (IV):-
or a salt thereof, where n is defined with reference to formula (II) and X is halogen, in the presence of a non-interfering solvent, and thereafter optionally converting the compound of formula (I) so obtained into a salt.
本发明提供了一种制备式(II)化合物的工艺: - 式(II)
其中 R3 和 R4 相同或不同,且为氢、C1-4、烷基、C1-4、烷氧基、氨基或硝基,且 n 为 2 至 5,该工艺包括使式(III)化合物的碱金属衍生物与式(IV)化合物反应: - 其中 R3 和 R4 如参照式(II)所定义。
其中 R3 和 R4 如参照式(II)所定义,与式(IV)化合物反应: - 式(III)化合物的碱金属衍生物
或其盐,其中 n 参照式(II)定义,X 为卤素,在无干扰溶剂存在下反应,然后任选将这样得到的式 (I)化合物转化成盐。