155883-42-4

Basic information

• Product Name: diethyl 2-<4-(3-hydroxy-2-phenyl-4H-pyrazolo<1,5-a>indolyl)>malonate
• Synonyms: diethyl 2-<4-(3-hydroxy-2-phenyl-4H-pyrazolo<1,5-a>indolyl)>malonate
• CAS NO: 155883-42-4
• Molecular Weight: 406.438
• Mol File: 155883-42-4.mol
• Article Data: 1

Chemical Properties

• CAS DataBase Reference: diethyl 2-<4-(3-hydroxy-2-phenyl-4H-pyrazolo<1,5-a>indolyl)>malonate(CAS DataBase Reference)
• NIST Chemistry Reference: diethyl 2-<4-(3-hydroxy-2-phenyl-4H-pyrazolo<1,5-a>indolyl)>malonate(155883-42-4)
• EPA Substance Registry System: diethyl 2-<4-(3-hydroxy-2-phenyl-4H-pyrazolo<1,5-a>indolyl)>malonate(155883-42-4)

Safety Data

• Hazardous Substances Data: 155883-42-4(Hazardous Substances Data)

Upstream product

• 155883-36-6 3-hydroxy-2-phenyl-4H-pyrazolo<1,5-a>indole 
• 155883-35-5 3-oxo-2-phenyl-3H-pyrazolo<1,5-a>indole 
• 105-53-3 diethyl malonate 

Relevant articles and documents

Preparation and reaction of 3-oxo-3H-pyrazolo[1,5-a]indole derivatives

An alternative method to prepare 3-oxo-2-phenyl-3H-pyrazolo[1,5-a]indole starting from indoline-2-carboxylic acid was explored. The reaction with nucleophilic agents allowed us to introduce the properly substituted alkyl substituents at C-4 of the 4H-pyrazolo[1,5-a]indoles. The 2,3-dichloro-5,6- dicyano-p-benzoquinone (DDQ) oxidation of these products gave the 3-oxo-2- phenyl-3H-pyrazolo[1,5-a]indole derivatives. Selective keto-enol tautomerizations of these 1,5-diketo-monoene system were observed.