SYNTHESIS OF DIMETHYL ESTERS OF 7-OXO-4,5,6,7-TETRAHYDROPYRAZOLO[1,5-<i>c</i>]PYRIMIDINE-2,3-DICARBOXYLIC ACID
DOI:
https://doi.org/10.1007/2649Keywords:
alkynes, diazopyrrolidones, pyrazoles, tetrahydropyrazolo[1, 5-c]pyrimidines, 1, 3-dipolar cycloaddition, [1, 5]-sigmatropic rearrangementAbstract
3-Diazopyrrolidones, prepared by nitrosation of 3-aminopyrrolidones with isoamyl nitrite in the presence of glacial acetic acid, enter in a 1,3-dipolar cycloaddition reaction with dimethyl ester of acetylenedicarboxylic acid to form tetrahydropyrazolo[1,5-c]pyrimidines in good yields.
How to Cite
Sultanova, R. M.; Lobov, A. N.; Spirikhin, L. V. Chem. Heterocycl. Compd. 2015, 51, 1048. [Khim. Geterotsikl. Soedin. 2015, 51, 1048.]
For this article in the English edition see DOI 10.1007/s10593-016-1817-7
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Published
2015-12-28
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Letters to the Editor