94692-14-5

Upstream product

• 94692-09-8 1-phenyl-5-(1H-pyrrol-1-yl)-1H-pyrazol-4-ylamine 
• 530-62-1 1,1'-carbonyldiimidazole 
• 100-63-0 phenylhydrazine 
• 16078-71-0 ethyl 5-amino-1-phenyl-1H-pyrazole-4-carboxylate 
• 94692-13-4 N,N'-bis<1-phenyl-5-(pyrrol-1-yl)pyrazol-4-yl>urea 
• 94692-08-7 ethyl N-[1-phenyl-5-(pyrrol-1-yl)-1H-pyrazol-4-yl]carbamate 
• 94692-06-5 1-phenyl-5-(pyrrol-1-yl)-1H-pyrazole-4-carbohydrazide 
• 94692-05-4 ethyl 1-phenyl-5-(pyrrol-1-yl)-1H-pyrazole-4-carboxylate 

Downstream Products

• 94691-80-2 (1-Phenyl-1H-pyrazolo[4,3-e]pyrrolo[1,2-a]pyrazin-5-yl)-hydrazine 
• 1312889-72-7 1-phenyl-4,5-dihydro-1H-pyrazolo[4,3-e]pyrrolo[1,2-a]pyrazine-5-thione 
• 94692-15-6 5-Chloro-1-phenyl-1H-pyrazolo[4,3-e]pyrrolo[1,2-a]pyrazine 

Relevant academic research and scientific papers

Pyrazoles and pyrazolo[4,3-e]pyrrolo[1,2-a]pyrazines II

Synthesis of the title compounds was achieved using the anils 2a-e and 5a-c derived from the 4-aminopyrazole 1 as starting materials. These compounds were allowed to react with mercaptoacetic acid in boiling dry benzene to afford the corresponding thiazol

NEW CONDENSED TRI- AND TETRACYCLIC PYRAZOLE RING SYSTEMS

1-Phenylpyrrazolopyrrolopyrazine and its 5-aza analogue were synthesized from ethyl 5-amino-1-phenylpyrazole-4-carboxylate.Additional azolo ring annelations on the pyrazine part of the first heterocycle afforded new tetracyclic systems with two common nitrogen atoms.