申请人:Labaz
公开号:US04108865A1
公开(公告)日:1978-08-22
Thiophene compounds of formula: ##STR1## wherein R.sub.1 represents an alkyl radical containing 1 to 4 carbon atoms, a cycloalkyl, cycloalkenyl or aralkyl radical, R.sub.2 represents an atom of hydrogen or a methyl radical with the proviso that when R.sub.2 represents methyl R.sub.1 represents alkyl, or R.sub.1 and R.sub.2, when they are taken together, represent, with the carbon atom to which they are attached, a cyclopolymethylene radical having from 3 to 6 carbon atoms, whereby a reaction medium comprising a solvent and a compound of the general formula: ##STR2## wherein R.sub.3 represents an atom of alkali metal, and R.sub.4 represents an atom of hydrogen or of alkali metal is treated at a temperature between -20.degree. and +80.degree. C with the appropriate quantity of a halide of the general formula: R.sub.5 X III in which X represents an atom of fluorine, chlorine, bromine, or iodine and R.sub.5 represents an alkyl radical containing 1 to 4 carbon atoms, a cycloalkyl, cycloalkenyl or aralkyl radical or the group --CH.sub.2 (CH.sub.2).sub.n X in which n is an integer in the range of from 1 to 4 inclusive and X has the meaning given above with the proviso that when R.sub.4 represents methyl R.sub.5 represents alkyl, and when R.sub.3 and R.sub.4 both represent an atom of alkali metal R.sub.5 represents the group --CH.sub.2 (CH.sub.2).sub.n X to obtain the desired thiophene derivative of formula I. The derivatives of formula I are useful as intermediate products for preparing pharmacologically active compounds.
硫代噻吩化合物的化学式为:其中R.sub.1代表含有1至4个碳原子的烷基基团、环烷基、环烯基或芳基基团,R.sub.2代表氢原子或甲基基团,但当R.sub.2代表甲基时,R.sub.1代表烷基;或者当R.sub.1和R.sub.2一起时,与它们连接的碳原子一起代表具有3至6个碳原子的环聚亚甲基基团,其中反应介质包括溶剂和具有以下一般式的化合物:其中R.sub.3代表碱金属原子,R.sub.4代表氢原子或碱金属原子,在温度在-20度至+80度之间,用适量的以下一般式的卤代物处理:其中X代表氟、氯、溴或碘原子,R.sub.5代表含有1至4个碳原子的烷基基团、环烷基、环烯基或芳基基团或基团--CH.sub.2(CH.sub.2).sub.nX,其中n为1至4的整数,X具有上述给定的含义,但当R.sub.4代表甲基时,R.sub.5代表烷基,当R.sub.3和R.sub.4都代表碱金属原子时,R.sub.5代表基团--CH.sub.2(CH.sub.2).sub.nX,以获得所需的化学式I的硫代噻吩衍生物。化学式I的衍生物可用作制备药理活性化合物的中间产物。