Synthesis of nitrogen‐containing heterocycles. 3 . Formation and structure of new 1,2,4‐triazole derivatives

Treatment of N (3)‐[(2‐cyano‐2‐ethoxycarbonyl)vinyl]amino‐ N (4), N (4)‐dimethylaminomethylenehydrazones of aromatic carbonyl compounds with hot acetic acid resulted in the formation of symmetrical gem‐bis‐(3‐dimethylamino‐1,2,4‐triazol‐1‐yl)methanes, (3‐dimethylamino‐1,2,4‐triazol‐1‐yl)arylmethyl acetates, and (3‐dimethylamino‐1,2,4‐triazol‐1‐yl)alkenes of a gem‐diaryl type depending upon whether the carbonyl compound was aldehyde or ketone.