74990-17-3

Upstream product

• 100-63-0 phenylhydrazine 
• 74989-95-0 (4R,5R)-4-Bromo-3-(4-nitro-phenyl)-1,5-diphenyl-4,5-dihydro-1H-pyrazole 
• 23893-30-3 1-(4-nitrophenyl)-3-phenyl-2,3-dibromopropan-1-one 
• 74990-06-0 3-(4-Nitro-phenyl)-1,5-diphenyl-1,5-dihydro-pyrazol-4-one 

Relevant academic research and scientific papers

TRIETHYLAMINE SOLUBILISED PHOSPHOROUS PENTASULPHIDE AS THIATION REAGENT : A NOVEL ROUTE TO TOTALLY THIATED HETEROCYCLES

Triethylamine solubilised phosphorous pentasulphide (P4S10) has been evolved as the thiation agent in heterocycles such as substituted benzoxazin-4-ones, 2-pyrazolin-4-ones and pyrimidine-2,5-dione derivatives.The simple and convenient operation involving

Synthesis of Some 1,3,5-Triaryl-2-pyrazolin-4-ones and Their Thio Analogues

Reaction of various chalkone dibromides with phenylhydrazine and 2,4-dinitrophenylhydrazine gives quantitatively, the novel 1,3,5-triaryl-4-bromo-2-pyrazolines (I) which are easily converted into 1,3,5-triaryl-2-pyrazolin-4-ones (II) in DMSO at room tempe