共查询到20条相似文献,搜索用时 15 毫秒
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The 1-alkoxy-6-nitro-1,2,3-benzotriazole system has been synthesized and characterized via its physical and chemical properties. INDO/molecular orbital calculations provide a good account of the major bands in its ultraviolet absorption spectrum. 相似文献
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Condensation of 2-chloro-4-nitrobenzoic acid with o, m, and p-anisidines under the conditions of the Ullmann reaction gives the corresponding 2-, 3-, or 4-methoxy derivatives of 5-nitrodiphenylamine-2-carboxylic acid. Phosphorus oxychloride cyclizes the latter to the corresponding methoxy-substituted 6-nitro-9-chloroacridines, and the latter, when treated with dilute hydrochloric acid, give good yields of methoxy derivatives of 6-nitroacridones. 相似文献
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T. M. Khomenko D. V. Korchagina K. P. Volcho N. F. Salakhutdinov 《Russian Journal of Organic Chemistry》2009,45(9):1402-1404
Both enantiomers of 4-nitro-6-trifluoromethyl-1,2,3-benzotrithiole 1-oxide as analogs of Varacins B and C were synthesized
for the first time. The use of the Modena method ensures higher optical purity but lower yields of the chiral sulfoxides,
as compared to the Kagan procedure. 相似文献
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T. V. Rybalova V. F. Sedova I. Yu. Bagryanskaya Yu. V. Gatilov O. P. Shkurko 《Chemistry of Heterocyclic Compounds》2001,37(2):206-211
The crystal structures of 6-chloro-4-nitro-2-phenylpyrimidine and 6-chloro-2-phenylpyrimidine have been determined using X-ray diffraction. The effect of the nitro group and the endocyclic nitrogen atoms on the geometric parameters of the 2- and 4-nitropyrimidine molecules, and also related -nitroazines are compared. 相似文献
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Enantiomers of 2-methyl-6-nitro-1,2,3,4-tetrahydroquinoline have been obtained by kinetic resolution of racemic 2-methyl-1,2,3,4-tetrahydroquinoline in acylation with acyl chlorides of N-protected amino acids followed by regioselective nitration of the diastereoisomeric amides and acidic hydrolysis. The introduction of a trifluoroacetyl protecting group into the position 1 of the enantio pure nitro compound followed by the reduction led to (S)-6-amino-2-methyl-1-trifluoroacetyl-1,2,3,4-tetra-hydroquinoline in a high yield. 相似文献
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Guskov A. A. Klenov M. S. Churakov A. M. Tartakovsky V. A. 《Russian Chemical Bulletin》2016,65(11):2763-2765
5-Amino-(tert-butyl-NNO-azoxy)-1,2,3,4-tetrazine 1,3-dioxide reacts with nitronium tetra-fluoroborate to give 5-amino-6-nitro-1,2,3,4-tetrazine 1,3-dioxide. This compound is of interest as a new energetic material. A plausible reaction mechanism involves electrophilic substitution of the tert-butyl-NNO-azoxy group by the nitro group.
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1-, 2-, 3-, and 4-methoxy derivatives of 6-nitro-9-(p-anisylamino) acridine ate synthesized. 相似文献
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A. V. Guttsait I. A. Meirovits N. P. Yadrevskaya I. É. Kalninya 《Chemistry of Heterocyclic Compounds》1993,29(9):1104-1105
Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 9, pp. 1288–1289, September, 1993. 相似文献
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L. V. Grishchuk E. I. Ivanov V. E. Kuz'min A. M. Turyanskaya R. Yu. Ivanova 《Chemistry of Heterocyclic Compounds》2003,39(3):340-343
The reaction of 4-aryl-2-hydrazino-3-nitro-6-R-quinolines with NaNO2 in AcOH gives the corresponding tetrazolo[1,5-a]quinolines. In contrast to tetrazolo[1,5-c]pyrimidines they cannot be converted to 6-R-4-phenyl[1,2,5]oxadiazolo[3,4-b]quinoline-3-oxides by heating in THF, toluene, or AcOH. Total energy quantum-chemical calculations using the MINDO/3 and MNDO methods show that [1,2,5]oxadiazolo[3,4-b]quinoline-3-oxides are significantly higher in energy (230-280 kcal/mol) than the mentioned tetrazolo[1,5-a]quinolines and hence their formation is unlikely. 相似文献