The synthesis and structure of 1,2,3,4-tetrahydro-2,4,4-trimethyl-8-nitroimidazo[1,5-d] [1,2,4]triazin-1-one, C8H11N5O3: A heterocycle with a rare ring system
作者:Ramachandra S. Hosmane、Benjamin B. Lim、Upali Siriwardane、Narayan S. Hosmane
DOI:10.1007/bf01156088
日期:1991.6
The title compound (IV) was isolated as a by-product during the course of purification of 4-nitroimidazol-5-(N1-methyl)hydrazide (II) by silica gel flash chromatography, employing chloroform-acetone (4:1) as the eluting solvent. The crystals are monoclinic, space group P2(1)/c, a = 7.425(1), b = 13.615(2), c = 10.359(2) angstrom, beta = 97.66(1)-degrees, d(calcd) = 1.44 g cm-3, mu (Mo K-alpha) = 1.06 mm-1, T = 298 K. The number of unique reflections = 2401, reflections with I greater-than-or-equal-to 3 sigma(I) = 1773; R = 0.051, R(w) = 0.061. The bond distances in IV are: N-N, 1.419(3); N-C(= O), 1.359(3); N(H)-C(CH3), 1.457(3); N(C)-C(CH3), 1.501(3); N=C, 1.316(3); C=C, 1.368(3), N-C(=N), 1.353(3); N-C(=C), 1.367(2) angstrom.