| abstract |
The invention concerns modified resins of formula (A1), wherein Hal represents in particular chlorine, their use for preparing products of formula (I), wherein: n represents 0 or 1; R1 and R4 either together form a saturated cycle optionally substituted containing optionally oxygen or NR5 or R4 represents hydrogen or alkyl and R1 represents hydrogen, carboxy, alkyl optionally interrupted by oxygen or nitrogen, aryl and heterocycles containing oxygen, sulphur and NR5 represents alkyl, aryl and heterocycles optionally substituted; R2 and R3 either together form a saturated cycle optionally substituted containing optionally oxygen or NR5 either represents R1 or alkenyl; R5 represents hydrogen, alkyl or phenyl optionally substituted. The invention also concerns certain products of formula (I), their isomers and their salts. |