88101-46-6

Basic information

• Product Name: Pyrazolo[1,5-a]pyrimidine-2,7(1H,4H)-dione, 5-methyl-
• CAS NO: 88101-46-6
• Molecular Formula: C7H7N3O2
• Molecular Weight: 165.151
• Mol File: 88101-46-6.mol
• Article Data: 1

Chemical Properties

• CAS DataBase Reference: Pyrazolo[1,5-a]pyrimidine-2,7(1H,4H)-dione, 5-methyl-(CAS DataBase Reference)
• NIST Chemistry Reference: Pyrazolo[1,5-a]pyrimidine-2,7(1H,4H)-dione, 5-methyl-(88101-46-6)
• EPA Substance Registry System: Pyrazolo[1,5-a]pyrimidine-2,7(1H,4H)-dione, 5-methyl-(88101-46-6)

Safety Data

• Hazardous Substances Data: 88101-46-6(Hazardous Substances Data)

Upstream product

• 141-97-9 ethyl acetoacetate 
• 28491-52-3 5-amino-1,2-dihydropyrazol-3-one 

Relevant articles and documents

STUDIES IN THE FIELD OF NITROGEN HETEROCYCLIC COMPOUNDS. PART VII. CYCLOCONDENSATION OF ETHYL ACETOACETATE WITH 5-AMINO-3-PYRAZOLONE LEADING TO 5H,8H-1,5a,8a-TRIAZAACENAPHTHYLENE DERIVATIVES - NOVEL NITROGEN BRIDGEHEAD RING SYSTEM

Cyclocondensation of 5-amino-3-pyrazolone (1) with ethyl acetoacetate (2) carried out in alkaline medium (pH ca. 10) led to formation of several products, depending upon the molar ratio of reagents used.Hitherto unknown ester 6, as well as two isomeric derivatives of novel bridgehead ring system, namely: 5H,8H-1,5a,8a-triazaacenaphthylene (B).The structures of the products result from their spectral data (1H NMR, MS) and some chemical transformations.Pathways of the formation of products are also discussed.