Fused-s-triazino heterocycles IX. 1,3,4,6,9b-pentaazaphenalenes and 1,3,6,9b-tetraazaphenalenes: Amino and alkoxy derivatives

The trichloromethyl group served as a useful leaving group in nucleophilic displacement reactions by a variety of substituted amines and alcohols (the latter under base catalysis) on 2-trichloromethyl-5-methyl-1,3,4,6,9b-pentaazaphenalene ( 1a ) and 2-trichloromethyl-4-cyano-1,3,6,9b-tetraazaphenalene ( 2a ). The reaction conditions were mild and the yields of the corresponding 2-substituted amino and alkoxy derivatives were generally good.