申请人:Science et Organisation
公开号:US05077408A1
公开(公告)日:1991-12-31
Process for the synthesis of compounds of formula (I): ##STR1## their pyridinium salts and N-oxides, in which formula: the nitrogen of the pyridine ring is situated in the .alpha.-, .beta.-, .gamma.- or .delta.-position with respect to the ring junction; R.sup.1 represents a halogen, a substituted or unsubstituted alkyl, a substituted or unsubstituted alkoxy or a nitro, substituted or unsubstituted amino, phenyl or cyano group; 0.ltoreq.m.ltoreq.2; R.sup.2 represents a lower alkyl or cycloalkyl group, a 5- or 6-membered heterocycle containing 1 or 2 hetero atoms, substituted or otherwise, or an aryl group ##STR2## such that: R.sup.3 represents a halogen, a substituted or unsubstituted alkyl, a substituted or unsubstituted alkoxy or a nitro, phenyl, substituted or unsubstituted sulfonyl, cyano, thioalkyl, substituted or unsubstituted amino, substituted or unsubstituted sulfinyl, mercapto, hydroxyl or ester group, 0.ltoreq.n.ltoreq.5 employing trimethylsilyl polyphosphate (PPSE) as a cyclization agent and enabling the compounds of formula (I) to be obtained in virtually quantitative yields. The compounds of formula I have anti-inflammatory, analgesic, and antipyretic activity.
合成化合物的过程是:合成公式(I)的化合物,它们的吡啶盐和N-氧化物,其中公式中:吡啶环的氮原子位于相对于环连接的α、β、γ或δ位置;R.sup.1代表卤素、取代或未取代的烷基、取代或未取代的烷氧基或硝基、取代或未取代的氨基、苯基或氰基;0≤m≤2;R.sup.2代表较低的烷基或环烷基、含有1个或2个杂原子的5-或6元杂环、取代或未取代,或芳基 ##STR2## 使得:R.sup.3代表卤素、取代或未取代的烷基、取代或未取代的烷氧基或硝基、苯基、取代或未取代的磺酰基、氰基、硫代烷基、取代或未取代的氨基、取代或未取代的亚砜基、巯基、羟基或酯基,0≤n≤5,使用三甲基硅聚磷酸酯(PPSE)作为缩合剂,并使得公式(I)的化合物以几乎定量的产率获得。公式I的化合物具有抗炎、镇痛和退烧活性。