1000808-99-0

Basic information

• Product Name: 2-benzyl-8-[(2-benzyl-3-methyl-4-oxo-2,4-dihydrochromeno[4,3-c]pyrazol-8-yl)methyl]-3-methyl-2,4-dihydrochromeno[4,3-c]pyrazol-4-one
• CAS NO: 1000808-99-0
• Molecular Weight: 592.654
• Mol File: 1000808-99-0.mol
• Article Data: 2

Chemical Properties

• CAS DataBase Reference: 2-benzyl-8-[(2-benzyl-3-methyl-4-oxo-2,4-dihydrochromeno[4,3-c]pyrazol-8-yl)methyl]-3-methyl-2,4-dihydrochromeno[4,3-c]pyrazol-4-one(CAS DataBase Reference)
• NIST Chemistry Reference: 2-benzyl-8-[(2-benzyl-3-methyl-4-oxo-2,4-dihydrochromeno[4,3-c]pyrazol-8-yl)methyl]-3-methyl-2,4-dihydrochromeno[4,3-c]pyrazol-4-one(1000808-99-0)
• EPA Substance Registry System: 2-benzyl-8-[(2-benzyl-3-methyl-4-oxo-2,4-dihydrochromeno[4,3-c]pyrazol-8-yl)methyl]-3-methyl-2,4-dihydrochromeno[4,3-c]pyrazol-4-one(1000808-99-0)

Safety Data

• Hazardous Substances Data: 1000808-99-0(Hazardous Substances Data)

Upstream product

• 1073-62-7 N-benzylhydrazine hydrochloride 

Relevant articles and documents

p-TsOH catalyzed regioselective synthesis of 8,8'-methylene-bis-4-oxo- dihydro-chromeno[4,3-c]pyrazoles

The ethyl-5-[3-(ethoxycarbonyl)-4-hydroxybenzyl]-2-hydroxybenzoate 3 is prepared by the usual esterification of 5-(3-carboxy-4-hydroxybenzyl)-2-hydroxy benzoic acid 2. Compound 3 on reacting with ethyl acetoacetate yields 3-acetyl-6-[(3-acetyl-4-hydroxy-2-oxo-2H-6-chromenyl)methyl]-4-hydroxy-2H-2- chromenone 4. The regioselective conversion, by cyclizing the hydrazone 5 of compound 4 to either 8,8'-methyIene-bis-4-oxo-1,4-dihydrochromeno[4,3-c] pyrazoles 6 with p-toluene sulfonic acid in refluxing xylene or 8,8'-methylene-bis-4-oxo-2,4-dihydro chromeno[4,3-c]pyrazoles 7 with corresponding hydrazine hydrochloride in refluxing acetic acid is described.