Substituted pyridines of the general formula: ##STR1## wherein R.sup.1 is hydroxyl or chlorine, and a) X is hydrogen or chlorine, R.sup.2 and R.sup.3 together are .dbd.O, R.sup.4 is a group of the formula --OR.sup.5 and R.sup.5 is hydrogen, C.sub.1 -C.sub.4 -alkyl or benzyl or b) X is hydrogen and R.sup.2, R.sup.3 and R.sup.4 together are .dbd.N--NH--, or c) X and R.sup.2 each is hydrogen and R.sup.3 and R.sup.4 together are --O--, or d) X and R.sup.2 each is hydrogen, R.sup.3 is hydroxyl and R.sup.4 is amino or hydroxy. The compounds are obtained by subjecting nicotine to microbiological oxidation to give 5-succinoyl-2-pyridone, followed by chemical reactions. The compounds are suitable as intermediates for the preparation of pharmaceutically active compounds.
通式为:##STR1## 其中R.sup.1为羟基或
氯,a) X为氢或
氯,R.sup.2和R.sup.3共同为.dbd.O,R.sup.4为公式--OR.sup.5的基团,R.sup.5为氢、C.sub.1-C.sub.4-烷基或苄基,或b) X为氢,R.sup.2、R.sup.3和R.sup.4共同为.dbd.N--NH--,或c) X和R.sup.2均为氢,R.sup.3和R.sup.4共同为--O--,或d) X和R.sup.2均为氢,R.sup.3为羟基,R.sup.4为
氨基或羟基。这些化合物是通过将
尼古丁进行微
生物氧化,得到5-琥珀酰基-2-
吡啶酮,然后进行
化学反应得到的。这些化合物适用于制备药物活性化合物的中间体。