Preparation and pyrolysis of 1-(pyrazol-5-yl)-1,2,3-triazoles and related compounds 1
作者:David Clarke、Richard W. Mares、Hamish McNab
DOI:10.1039/a700421d
日期:——
1-(Pyrazol-5-yl)-1,2,3-triazoles 8a, 9a and 10 are prepared by
cycloaddition of 5-azidopyrazoles with methyl prop-2-ynoate. The
regiochemistry of the process is confirmed by synthesis of 9a using an
authentic route from ethyl 2-formyl-2-diazoacetate 13. Flash vacuum
pyrolysis of 8a, 9a and 10 gives
5-methoxypyrazolo[1,5-a]pyrimidin-7-ones 16–18 by a
mechanism involving an unexpected oxoketenimine–imidoyl ketene
rearrangement as the key step. The mechanism is supported by a
13C labelling experiment. A general route to
pyrazolo[1,5-a]pyrimidin-7-ones from pyrazolylaminomethylene
Meldrum's acid derivatives (e.g. 30–32) is also
reported.
Synthesis, characterization and theoretical study of 2-azido-4-nitroimidazole-based energetic salts
作者:Ke-Hui Hou、Cong-Ming Ma、Zu-Liang Liu
DOI:10.1016/j.cclet.2013.12.007
日期:2014.3
The 2-azido-4-nitroimidazole-based energetic salts were synthesized in a simple and straightforward manner. The structures of these new salts were determined by IR, H-1 NMR and C-13 NMR spectroscopy and elemental analysis. These salts also exhibited high positive enthalpies of formation, high nitrogen content, and moderate detonation properties. (C) 2013 Zu-Liang Liu. Published by Elsevier B.V. on behalf of Chinese Chemical Society. All rights reserved.
ALCALDE E.; CLARAMUNT R. M., TETRAHEDRON LETT. <TELE-AY>, 1975, NO 18, 1523-1524
作者:ALCALDE E.、 CLARAMUNT R. M.
DOI:——
日期:——
GRANADOS R.; RULL M.; VILARRASA J., J. HETEROCYCL. CHEM., 1976, 13, NO 2, 281-284