| abstract |
Substituted 3-aminosydnone imines of the general formula I <IMAGE> (I) and their pharmacologically acceptable acid addition salts, in which A denotes an alkylene chain; X denotes one of the groups -O- or -S-; R1 denotes e.g. hydrogen; R2 denotes e.g. an alkyl group, are prepared by cyclization of a compound of the formula II <IMAGE> (II) and, if appropriate, subsequent acylation, and have useful pharmacological properties. |