| abstract |
Title cpds. are 3-(N-R1-N-R2-amino)-4-halo-N-R3-sydonimines and their acid addition salts (where R1 and R2 are alkyl or opt. methyl- or halo-substd. aralkyl or NR1r2 is a heterocyclic ring opt. contg. a further hetero-atom and opt. methyl-substd., R3 is H or -COR4 and R4 is alkyl, cycloalkyl, Ph, halophenyl, opt. substd. N-contg. heterocyclyl, alkoxy, aralkoxy, aryloxy or alkenyloxy) which are prepd. by reacting a 3-(N-R1-N-R2-amino)-N-COR4-sydnonimine with a halogenating agent and opt. deacylating the product. |