87100-57-0

Upstream product

• 22073-84-3 4-hydroxy-6-methyl-3-propionyl-2H-pyran-2-one 
• 100-63-0 phenylhydrazine 

Downstream Products

• 87100-65-0 1-(3-Ethyl-5-hydroxy-1-phenyl-1H-pyrazol-4-yl)-butane-1,3-dione 
• 87100-96-7 2-Chloro-1-(3-ethyl-5-hydroxy-1-phenyl-1H-pyrazol-4-yl)-butane-1,3-dione 
• 87100-92-3 5-Acetyl-3-ethyl-1-phenyl-1H-pyrano[2,3-c]pyrazol-4-one 
• 87101-00-6 5-Chloro-3-ethyl-6-methyl-1-phenyl-1H-pyrano[2,3-c]pyrazol-4-one 
• 87100-88-7 3-Ethyl-6-methyl-1-phenyl-1H-pyrano[2,3-c]pyrazol-4-one 
• 87100-65-0 3-ethyl-4-(acetacetyl)-1-phenyl-2-pyrazolin-5-one 

Relevant academic research and scientific papers

Synthesis of some pyrano[2,3-c]pyrazoles

Synthetic methods have been developed to prepare pyrano[2,3-c]pyrazoles with various substituents at ring positions 1, 3, and 6. The 1H- and 13C-NMR properties of these products and their precursors are presented and discussed.

Regeneration of the carbonyl group in the hypervalent iodine oxidation of carbonyl derivatives of dehydroacetic acid and its analogues

Hypervalent iodine oxidation of carbonyl derivatives of dehydroacetic acid and its analogues leads to a mild and efficient regeneration of parent carbonyl compounds leaving pyrone moiety intact.

Synthesis of 4-(Acylacetyl)-1-phenyl-2-pyrazolin-5-ones from 3-Acyl-2H-pyran-2,4(3H)-diones. Their Synthetic Applications to Functionalized 4-Oxopyranopyrazole Derivatives.

The phenylhydrazones of 3-acyl-2H-pyran-2,4(3H)-diones (2), in refluxing acetic acid, underwent rearrangement to 4-(acylacetyl)-1-phenyl-2-pyrazolin-5-ones (6), from which some functionalized 4-oxopyranopyrazole derivatives were synthesized.This fi