Heterocycles. X. Synthesis and Reactions of 1, 4, 5-Benzotriazocinium Salts

Abstract

Ring closure reactions of 2-chloroacetamidobenzophenone (N, N-disubstituted)-hydrazones (5) afforded 1, 4, 5-benzotriazocines (6), 1, 4-benzodiazepines (9) and 1, 4, 5-benzotriazocinium salts (8). On treatment with sodium methoxide, 5 and 8 gave 3-(N, N-disubstituted) amino-1, 4-benzodiazepin-2-ones (11) in good yields through Stevens-type rearrangement.