91036-55-4

Basic information

• Product Name: 7H-1,3,4-Oxadiazolo[3,2-a]pyrimidine-5-carboxylic acid, 2-(4-methoxyphenyl)-7-oxo-, ethyl ester
• CAS NO: 91036-55-4
• Molecular Formula: C15H13N3O5
• Molecular Weight: 315.285
• Mol File: 91036-55-4.mol
• Article Data: 1

Chemical Properties

• CAS DataBase Reference: 7H-1,3,4-Oxadiazolo[3,2-a]pyrimidine-5-carboxylic acid, 2-(4-methoxyphenyl)-7-oxo-, ethyl ester(CAS DataBase Reference)
• NIST Chemistry Reference: 7H-1,3,4-Oxadiazolo[3,2-a]pyrimidine-5-carboxylic acid, 2-(4-methoxyphenyl)-7-oxo-, ethyl ester(91036-55-4)
• EPA Substance Registry System: 7H-1,3,4-Oxadiazolo[3,2-a]pyrimidine-5-carboxylic acid, 2-(4-methoxyphenyl)-7-oxo-, ethyl ester(91036-55-4)

Safety Data

• Hazardous Substances Data: 91036-55-4(Hazardous Substances Data)

Upstream product

• 5711-61-5 2-amino-5-(4-methoxyphenyl)-1,3,4-oxadiazole 
• 762-21-0 acetylenedicarboxylic acid diethyl ester 

Relevant articles and documents

Synthesis of New Condensed Pyrimidine Systems: Reactions of Heterocyclic Amines with Acetylenic Esters

Several hitherto unreported 1,3,4-oxa/thiadiazolopyrimidin-7-ones (1 and 2) and thiazolopyrimidin-7-ones (3) have been synthesised by the reaction of 2-amino-1,3,4-oxa/thiadiazoles and 2-amino-4-arylthiazoles respectively with ethyl phenylpropiolate.The reaction of these amines with diethyl acetylenedicarboxylate furnishes the 7-oxo-5-carbethoxy derivatives (8-10).A similar reaction of 2-aminobenzothiazole with diethyl acetylenedicarboxylate affords 4-carbethoxypyrimidobenzothiazol-2(H)-one (7).To assign the structures of the 7-oxo derivatives the isomeric 5-oxo-7-carbethoxy derivatives (14) have also been synthesised by an unambiguous route.