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M. S. Rovinskii V. G. Dolyuk V. B. Zhukhovitskii V. G. Shtamburg M. M. Kremlev 《Chemistry of Heterocyclic Compounds》1977,13(6):667-668
Arenesulfonamides are split out in the reaction of N-(arylsulfonyl)arylglyoxylamides with o-phenylenediamine to give 3-aryl-2-quinoxalones.Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 6, pp. 819–820, June, 1977. 相似文献
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V. G. Shtamburg V. F. Rudchenko I. I. Chervin V. M. Grinev O. L. Skobelev R. G. Kostyanovskii 《Russian Chemical Bulletin》1989,38(10):2193-2194
Perhydro-1,3,2-dioxazepines were obtained for the first time by the acid-catalyzed cyclization of acyclic N,N-dialkoxyamines.Translated from Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, No. 10, pp. 2382–2384, October, 1989. 相似文献
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S. P. Ivonin A. V. Lapandin V. G. Shtamburg 《Chemistry of Heterocyclic Compounds》2005,41(12):1484-1493
The reaction of phenylglyoxal hydrate with N,N-dimethylhydrazones of furfural and 1-methylpyrrole-2-carbaldehyde proceeds
regioselectively at position 5 of the heterocycle. The hetaryl analogs of α-benzoins obtained are quantitatively isomerized
into the isomeric β-benzoins. The N,N-dimethylhydrazonomethyl group, while activating the hetaryl residue, reduces the time
for isomerization compared with unfunctionalized benzoins. The N, N-dimethylhydrazonomethyl group is readily transformed into
an aldehyde or nitrile group and enters into a trans-hydrazonation reaction.
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Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 12, pp. 1805–1814, December, 2005. 相似文献
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V. G. Shtamburg V. F. Rudchenko Sh. S. Nasibov I. I. Chervin A. P. Pleshkova R. G. Kostyanovskii 《Russian Chemical Bulletin》1981,30(10):1907-1913
Conclusions N-chloro-N-alkoxy-N-tert-alkylamines react exclusively with CN– and SCN– and partially with Et– and AcO– to give nucleophilic substitution products at the nitrogen atom. These compounds react with AcO– and water to give nitroso compounds, with EtS– and Ph3 P to give azoxy compounds, and with AgF and AgNO3 to give products of more complex transformations.For communication 14, see ref. [1].Translated from Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, No. 10, pp. 2320–2326, October, 1981. 相似文献
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The isomerization of the hetaryl analogs of unsymmetrical benzoins on heating in basic media is a convenient preparative method for the production of -hydroxyacyl derivatives of -excessive heterocycles. The motivating force here for the isomerization is the formation of a thermodynamically more stable product. It was established that isomerization is promoted by increase in the difference between the electron-donating characteristics of the (het)aryl residues 相似文献
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V. G. Shtamburg V. F. Rudchenko Sh. S. Nasibov I. I. Chervin A. P. Pleshkova R. G. Kostyanovskii 《Russian Chemical Bulletin》1981,30(10):1914-1920
Conclusions The reactions of N-chloro-N-alkoxy-N-tert-alkylamines with amines are characterized by nucleophilic substitution at the nitrogen atom with formation of the corresponding N-alkoxyhydrazines which are stable in the case of ethyleneimine and pyridine; give diazenes as in the case of MeNH2, EtNH2, and Me2
or yield products of further transformations as in the case of NH3, Me2NH, and MeO(Me)NH. Nucleophilic substitution is repressed in the reaction with Et2NH and Et3 N by one-electron reduction with the formation of azoxy compounds.For Communication 15, see previous article [1].Translated from Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, No. 10, pp. 2327–2334, October, 1981. 相似文献