abstract |
A compound of the formula 3516 ט" ז בשבט התשס" ד - February 8, 2004 wherein X is selected from the group consisting of arylsulphonyloxy, C1-C4 alkylsulphonyloxy, nitro or halo substituted benzenesulphonyloxy, C1-C4 perfluoroalkylsulphonyloxy, optionally substituted aroyloxy, C1-C4 perfluoroalkanoyloxy, C1-C4 alkanoyloxy, halo; diazonium; methoxy, oxonium, perchloryloxy, quaternaryammonium C1-C4 alkylsulphonyloxy, halosulphonyloxy, halonium and diarylsulphonylamino. |