478375-82-5

Upstream product

• 42059-75-6 6,8-dimethyl-3-formylchromone 
• 19735-89-8 3-methyl-1-phenylpyrazolin-5(4H)-one 
• 89-25-8 edaravone 

Relevant academic research and scientific papers

Ultrasonically accelerated Knoevenagel condensation reaction at room temperature in distilled water

The condensation reaction of 4-oxo-4H-1-benzopyran-3-carbaldehyde with 3-methyl-1-phenylpyrazolin-5-(4H)-one has been carried out under ultrasonic irradiation at room temperature (R.T.) in distilled water (D/W) as solvent, catalyzed by borate zirconia cat

Synthesis of 3-methyl-4-[(chromon-3-yl) methylene]-1-phenylpyrazolin-5(4H)-ones and their conversion into 2-thio-5-hydroxy-5H-[1]-benzopyrano[4,3-d] pyrimidines

Reaction of 4-oxo-4H-[1]-benzopyran-3-carboxaldehydes with 3-methyl-1-phenylpyrazolin-5(4H)-one in dioxane in the presence of triethyl amine affords 3-methyl-4-[(chromon-3-yl)methylene]- 1-phenylpyrazolin-5(4H)-ones 3a-k. Condensation of 3 with thiourea i