Nitropyrazoles. 4. N-amination under control of the pH of the medium

Nitropyrazoles. 4. N-amination under control of the pH of the medium Full article

Journal

Russian Chemical Bulletin
ISSN: 1573-9171 , E-ISSN: 1066-5285

Output data

Year: 1993, Volume: 42, Number: 8, Pages: 1369-1371 Pages count : 3 DOI: 10.1007/bf00699933

Authors

Vinogradov V.M. ¹ , Dalinger I.L. ¹ , Gulevskaya V.I. ¹ , Shevelev S.A. ¹

Affiliations

1	N. D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, 47 Leninsky prosp., 117913, Moscow, Russian Federation

A preparative method ofN-amination of pyrazoles bearing nitro groups and other electron withdrawing substituents in the pyrazole ring with hydroxylamine-O-sulfonic acid involving control of the pH of the medium has been elaborated. A series of previously unknown pyrazoles has been prepared. Basicities of 1-aminopyrazole and 1-amino-4-nitropyrazole have been measured and differences between the basicities of theC- andN-amino groups for the pyrazole series have been revealed.

Vinogradov V.M. , Dalinger I.L. , Gulevskaya V.I. , Shevelev S.A.
Nitropyrazoles. 4. N-amination under control of the pH of the medium
Russian Chemical Bulletin. 1993. V.42. N8. P.1369-1371. DOI: 10.1007/bf00699933 WOS Scopus OpenAlex

≡ Web of science:	WOS:A1993NT25400019
≡ Scopus:	2-s2.0-21344476432
≡ OpenAlex:	W2330651104