87100-65-0

Upstream product

• 22073-84-3 4-hydroxy-6-methyl-3-propionyl-2H-pyran-2-one 
• 100-63-0 phenylhydrazine 
• 87100-57-0 4-Hydroxy-6-methyl-3-[1-(phenyl-hydrazono)-propyl]-pyran-2-one 

Downstream Products

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

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