| abstract |
In hitherto unknown compounds having formula (I), R1 is a saturated or unsaturated, straight or branched C1-C10 alicyclic or aliphatic hydrocarbon radical, an aryl or aryl radical - C1C4-alkyl, R1 being, if desired , unsubstituted or substituted by C1-C4-straight or branched alkyl, amino, C1-C4-alkylamino, di- (C1-C4-alkyl) -amino, carboxy, C1-C4-alkoxycarbonyl, hydroxy, C1-C4- alkoxy, phenoxy, mercapto, C1-C4-alkylthio, phenylthio, halogen, trifuloromethyl; R2 represents hydrogen, C1-C8-alkyl, halogen or aryl-C1-C4-alkyl; X represents 0 or S, and n is an integer between 0 and 2; provided that R2 is not hydrogen or methyl if n = O and if R1 is methyl. The compounds of the invention are of great utility in human and veterinary chemistry. |