申请人:PACOR
公开号:US04496568A1
公开(公告)日:1985-01-29
This invention relates to a process for the preparation of antiinflammatory thieno [2,3-c]- and [3,2-c]pyridines having respectively the following formulae: ##STR1## in which R.sub.1 and R.sub.2, which may be the same or different, represent each a hydrogen atom or an alkyl group, and their pharmaceutically acceptable acid addition salts, comprising: (a) condensing a compound of the following formulae (VII) or (VIII), respectively, ##STR2## with a sulfonyl chloride having the formula ClSO.sub.2 R.sub.3, in which R.sub.3 is a lower alkyl radical or a phenyl radical optionally substituted with a halogen atom or a lower alkyl group, within a two-phase solvent system and in the presence of sodium carbonate; (b) oxidizing in a solvent medium the resulting alcohols having respectively the following formula (V) or (VI): ##STR3## (c) treating the resulting ketones, having the following formula (III) or (IV): ##STR4## with a basic agent having the formula RO.sup.- M.sup.+ in which R is a branched- or straight-chain aliphatic alkyl radical and M.sup.+ is an alkali metal cation, within an alcohol solvent having the formula ROH, and at the reflux temperature of the reaction mixture, to give the compounds of the formula (I) or (II), respectively.
本发明涉及一种制备抗炎噻吩[2,3-c]-和[3,2-c]吡啶的方法,它们分别具有以下式子:##STR1## 其中R.sub.1和R.sub.2可以相同也可以不同,分别代表氢原子或烷基,以及它们的药学上可接受的酸盐,包括:(a)在双相溶剂体系中,在碳酸钠的存在下,将以下式子(VII)或(VIII)的化合物与具有ClSO.sub.2R.sub.3式的磺酰氯缩合,其中R.sub.3是低碳基或苯基,可选地取代有卤素或低烷基;(b)在溶剂介质中氧化得到以下式子(V)或(VI)的醇:##STR3## (c)用以下式子RO.sup.- M.sup.+的碱性试剂处理具有以下式子(III)或(IV)的产物:##STR4## 其中R是支链或直链脂肪基烷基,M.sup.+是碱金属阳离子,在具有以下式子ROH的醇溶剂中,在反应混合物的沸腾温度下,得到以下式子(I)或(II)的化合物。