ChemInform Abstract: Synthesis and NMR-Spectroscopic Investigation of Pyrazolo[1,5-a]pyrimidine Derivatives.
Abstract
ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract
The reaction of diaminonitropyrazole (I) with unsymmetrical β-dicarbonyls (II) prooceds regioselectively to give the 7-oxo-pyrazolopyrimidines (III). A similar reaction proceeds with the enaminoketones (VI) and (IX). The pyrazolopyrimidines (III), (VIIa), and (X) are used for further reaction with dimethylformamide diethylacetal to produce Schiff bases, which are characterized by NMR.
