substituted spiro[bicyclo[2.2.1]hept-2-en-7-one[5.4']-1',2',3'-triazole] derivative 3a-c, was formed in all cases. Compounds 3a-c are not stable in solution and rearrange even at room temperature into the corresponding 5-amino-1-aryl-4-[cyclopent-3-en-1-one-2-yl] methyl- 1',2',3'-triazoles 4a-e. The structures of the products are clarified on the basis of spectroscopical data and the reaction pathways are
nes were reacted with halomethylradicals generated by reaction of halo methanes with benzoyl peroxide or copper(I)chloride. In the former case the corresponding l-aryl-4-trihaloethyl-v-triazoles and 1-aryl-4-halomethyl-v-triazoles were formed. In the second case the corresponding l-aryl-4-trihaloethyl-5-morpholino v-triazoles accompanied by triazoles were obtained. Reaction mechanisms are discussed
1R*, 4R*, 5S*, 5'S*-5'-Amino-1'-(4-nitrophenyl)-4',5'-dihydrospiro[bicyclo [2.2. 1]hept-2-ene[5.4]-1',2',3'-triazoles] have been obtained both by ?4 +2]-cycloaddition of cyclopentadiene to amino-methylene-1-(4-nitrophenyl)-4,5-dihydro-v-triazoles and by [3+2]-cycloaddition of 4-nitrophenylazide to 5-aminomethylene-2-norborenes . The configuration has been fully established by X-ray crystallographic