3994-40-9Relevant articles and documents
Synthesis, Characterization, and Rapid Cycloadditions of 5-Nitro-1,2,3-triazine
Glinkerman, Christopher M.,Boger, Dale L.
supporting information, p. 2628 - 2631 (2018/05/17)
The synthesis, characterization, and a study of the cycloaddition reactions of 5-nitro-1,2,3-triazine (3) are reported. The electron-deficient nature of 3 permits rapid cycloaddition with a variety of electron-rich dienophiles, including amidines, enamines, enol ethers, ynamines, and ketene acetals in high to moderate yields. 1H NMR studies of a representative cycloaddition reaction between 3 and an amidine revealed a remarkable reaction rate and efficiency (1 mM, 3CN, 23 °C, >95%).
Nitropyrazoles 4. N-Amination under control of the pH of the medium
Vinogradov, V. M.,Dalinger, I. L.,Gulevskaya, V. I.,Shevelev, S. A.
, p. 1369 - 1371 (2007/10/02)
A preparative method of N-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 (pKBH+) of 1-aminopyrazole and 1-amino-4-nitropyrazole have been measured and differences between the basicities of the C- and N-amino groups for the pyrazole series have been revealed. - Key words: nitropyrazoles, N-aminopyrazoles, N-amination.
