Synthesis of 6-(N-azolyl)cyclohex-2-enones fromN-acetonylazoles
作者:A. V. Samet、A. N. Yamskov、V. V. Kachala、V. V. Semenov
DOI:10.1007/bf02496177
日期:1999.3
N-Acetonylazoles react with chalcones in the presence of a base to givetrans-3,5-disubstituted 6-(N-azolyl)cyclohex-2-enones. Usually, the reactions are fast and high-yielding.
Mechanism of nitration of nitrogen-containing heterocyclic N-acetonyl derivatives. General approach to the synthesis of N-dinitromethylazoles
作者:V. V. Semenov、S. A. Shevelev、A. B. Bruskin、M. I. Kanishchev、A. T. Baryshnikov
DOI:10.1007/s11172-009-0285-y
日期:2009.10
bicyclic analogs, as well as imides of carboxylic and sulfonic acids and substituted hydrazines with mixtures of sulfuric and nitric acids. The kinetic study of the reaction mechanism was performed using UV and NMR spectroscopy. It was found that the NO2 groups were sequentially introduced into the methylene fragment by the addition of the nitronium ion to multiple bonds of intermediate enols followed
Thermal ring-openingreaction of N-(R-dinitromethyl)-5-nitrotetrazoles (R=NO2, F, Cl) yielded highly reactive N-(R-dinitromethyl)-nitrilimine intermediates under mild conditions. These species underwent facile and regiospecific reaction with nitriles and acetylenes to afford the corresponding nitrotriazoles and nitropyrazoles in 50–90% yields. Treatment of N-(chlorodinitromethyl)-5-nitrotetrazole with
N-(R-二硝基甲基)-5-硝基四唑(R = NO 2,F,Cl)的热开环反应在温和条件下产生了高反应性的N-(R-二硝基甲基)-硝胺中间体。这些物种与腈和乙炔进行易位和区域特异性反应,以50-90%的产率提供相应的硝基三唑和硝基吡唑。用过量的叠氮化物处理N-(氯二硝基甲基)-5-硝基四唑得到分子式为C 2 N 14的独特化合物。根据分析数据,将其分配为二叠氮基亚甲基羰基肼基二叠氮化物的结构。
Synthesis of (difluoroamino)tetrazoles and [(difluoroamino)alkyl]tetrazoles
作者:A. V. Fokin、Yu. N. Studnev、V. P. Stolyarov、A. A. Mel'nikov
DOI:10.1007/bf02494724
日期:2000.5
Abstract(Difluoroamino)tetrazoles were obtained by direct fluorination of 5-aminotetrazoles with gaseous fluorine. Reactions of 2-(oxoalkyl)- and 2-(hydroxyalkyl)tetrazoles with difluoroamine yielded [(difluoroamino)alkyl]tetrazoles.
Synthesis and structure of 2-amino- 5-azolyl-3-cyano-4H-pyrans
作者:A. V. Samet、A. M. Shestopalov、M. I. Struchkova、V. V. Semenov、V. N. Nesterov、Yu. T. Struchkov
DOI:10.1007/bf01457783
日期:1996.8
Previously unknown 5-azolylpyrans were obtained by reactions ofN-acetonyl- andN-phenacylimidazoles, -triazoles, and -tetrazoles with arylmethylenemalononitriles. The structure of 2-amino-3-cyano-6-methyl-5-(5-nitrotetrazol-2-yl)-4-phenyl-4H-pyran was established by X-ray structural analysis.