This invention relates to a process for the preparation of thieno-pyridine derivatives having the structural formula: ##STR1## in which R.sub.1 represents an optionally substituted alkyl, aryl or aralkyl radical, and R.sub.2 and R.sub.3 represnt each hydrogen or a lower alkyl, aryl or heterocyclic radical, comprising: (a) reacting a derivative of the formula ##STR2## in which R.sub.2 and R.sub.3 are as defined for formula (I) and X represents hydrogen, or an alkali metal, or a radical Mg-Y in which Y represents halogen, with a halo-sulfonyl derivative having the formula: Hal--SO.sub.2 --R.sub.4 (III) in which Hal represents halogen and R.sub.4 represents an optionally substituted alkyl, aryl or aralkyl group, to give a compound having the formula: ##STR3## (b) subsequently reacting the latter compound with an amine of the formula: R.sub.1 --NH.sub.2 (V) in which R.sub.1 is as defined for the formula (I), to give a compound having the formula: ##STR4## and (c) subsequently cyclizing compound (VI) with formaldehyde to give the derivative of the formula (I).
这项发明涉及一种制备具有结构式的
噻吩-
吡啶衍生物的方法:##STR1##其中R.sub.1代表可选择地取代的烷基、芳基或芳基烷基基团,R.sub.2和R.sub.3分别代表氢或较低的烷基、芳基或杂环基团,包括:(a)将具有以下式的衍
生物与具有以下式的卤代磺酰衍
生物反应:Hal--SO.sub.2 --R.sub.4 (III)其中Hal代表卤素,R.sub.4代表可选择地取代的烷基、芳基或芳基烷基团,以得到具有以下式的化合物:##STR3##(b)随后将后一化合物与具有以下式的胺反应:R.sub.1 --NH.sub.2 (V)其中R.sub.1如式(I)所定义,以得到具有以下式的化合物:##STR4##(c)随后将化合物(VI)与
甲醛环化以得到式(I)的衍
生物。