The invention concerns compounds of formula ##STR1## wherein the sulphur is bonded to the pyridinium ring at position 2 or 4, Y is --S-- or --CH.sub.2 --, R represents hydrogen, or a lower alkyl group, or other carboxylic protecting group; R.sup.1 represents hydrogen or lower alkyl; R.sup.2 represents lower alkyl, aryl of 6 to 10 carbon atoms or aralkyl of 7 to 11 carbon atoms; R.sup.3 represents hydrogen or a substituent selected from lower alkyl, halogen and lower alkoxy; q and r are each 1 or 2; and X.sup..crclbar. represents a halide ion or an organosulphonate ion, which are antihypertensive agents and are useful as intermediates to captopril and analogous compounds.
该发明涉及公式##STR1##的化合物,其中
硫与
吡啶环在2位或4位位置结合,Y为--S--或--CH.sub.2--,R代表氢,或低烷基,或其他羧基保护基团;R.sup.1代表氢或低烷基;R.sup.2代表低烷基,6至10个碳原子的芳基或7至11个碳原子的芳基烷基;R.sup.3代表氢或从低烷基,卤素和低烷氧基中选择的取代基;q和r各为1或2;X.sup..crclbar.代表卤离子或有机
磺酸盐离子,它们是降压药物,并可用作卡普托普利和类似化合物的中间体。