申请人:Societa' Farmaceutici Italia S.p.A.
公开号:US03975389A1
公开(公告)日:1976-08-17
New derivatives of caffeine are disclosed having the formula: ##SPC1## Where R.sub.1, R.sub.2, R.sub.3 and R.sub.4 are selected from the group consisting of hydrogen, chlorine, bromine, an alkyl or an alkoxy radical containing from 1 to 4 carbon atoms. They are made by transforming 8-.alpha. hydroxyethyl caffeine into the corresponding 8-.alpha.-chloroethyl caffeine by the action of a suitable chlorinating agent such as thionyl chloride, reacting the product so obtained in a suitable solvent such as anhydrous dimethylformamide at a temperature from 40.degree. to 110.degree. C and for a period of time from 1 to 5 hours with the sodium or potassium salt of a nicotinic acid of the formula: ##SPC2## Where R.sub.1, R.sub.2, R.sub.3 and R.sub.4 have the above-mentioned meanings, and crystallizing the resulting product from a suitable solvent, such as ethanol. These new compounds have broncholitic activity.
公开了咖啡因的新衍生物,其化学式为:##SPC1##其中R.sub.1、R.sub.2、R.sub.3和R.sub.4从氢、氯、溴、含有1至4个碳原子的烷基或烷氧基的群中选择。它们通过将8-α-羟乙基咖啡因转化为相应的8-α-氯乙基咖啡因,使用适当的氯化剂(如亚磺酰氯),在适当的溶剂(如无水二甲基甲酰胺)中,在40℃至110℃的温度下反应1至5小时,与烟酸钠或烟酸钾的盐反应,其化学式为:##SPC2##其中R.sub.1、R.sub.2、R.sub.3和R.sub.4具有上述含义,并从适当的溶剂(如乙醇)中结晶得到产物。这些新化合物具有支气管扩张活性。