Reactions with Hydrazonoyl Halides. Part 16.1 A Convenient Synthesis of 1,4-Benzothiazine, Triazolo[4,3-a]-benzimidazole, Thiazolo[3,2-a]benzimidazole and 2,3-Dihydro-1,3,4-thiadiazole Derivatives

Reactions with Hydrazonoyl Halides. 31. Synthesis of Some New Pyrrolidino[3,4-c]pyrazolines, Pyrazoles, and Pyrazolo[3,4-d]pyridazines

“…In continuation of our interest in the synthesis of heterocyclic systems containing a pyrazole moiety [6][7][8][9][10], we report herein a facile synthesis of pyrrolidino [3,4-c]pyrazoline, pyrazole, and pyrazolo [3,4-d]pyridazine derivatives.…”

Utilization of thiazolylacetonitriles in the synthesis of thiophene, thiazole, pyrazolo[1,5-a]pyrimidine and pyrazolo [5,1-c]triazine derivatives

“…The present investigation deals with the synthesis of some such types of compounds, in continuation of our studies in the chemistry of these heterocycles [2][3][4][5][6]. The syntheses of several new heterocyclic derivatives are described.…”