排序方式: 共有25条查询结果,搜索用时 109 毫秒
1.
V.V. Nosyreva A.G. Mal'kina O.A. Shemyakina E.I. Kositsyna A.I. Albanov B.A. Trofimov 《Russian Journal of Organic Chemistry》2005,41(8):1202-1207
Nucleophilic addition of tetrazole to 4-hydroxy-4-alkyl-2-alkynonitriles and to 3-phenyl-2-propynonitrile occurred regiospecifically and afforded E-, Z-4-hydroxy-4-methyl-3-tetrazolyl-2-alkenonitriles and 3-tetrazolyl-3-phenyl-2-propenonitrile [20–40°C, 13–50 h, 4–15 wt% MOH (M = Na, K), THF (or DMSO)] in up to 69% yield. The attempt to perform cyclization of the hydroxy-containing adducts into iminodihydrofurans (KOH, ethanol, 23-25°C) resulted in vinyl nucleophilic substitution of the tetrazole moiety by an ethoxy group. 相似文献
2.
Andriyankova L. V. Zhivet'ev S. A. Mal'kina A. G. Kudryakova P. N. Kositsyna E. I. Il'icheva L. N. Ushakov I. A. Afonin A. V. Trofimov B. A. 《Russian Journal of Organic Chemistry》2002,38(11):1681-1685
Reactions of nucleophilic addition of 2- and 4-mercaptopyridines to 3-phenyl-2-propynonitrile, 4-hydroxy-4-alkyl-2-alkynonitriles, and methyl 2-butynoate (triethylamine, 20-25 or 100°C) give rise to the corresponding S-adducts with Z-configuration (for cyanoethylenes), or to a mixture of E- and Z-isomers in 60:40 ratio for methyl 2-butynoate. 相似文献
3.
É. I. Kositsyna B. A. Trofimov G. M. Gavrilova S. V. Amosova V. I. Gostevskaya 《Chemistry of Heterocyclic Compounds》1981,17(8):776-779
It was established by IR spectroscopy that 2H,6H-2,6-dimethyl-4-amino-1,3,5-di-thiazine exists in the amino form in carbon tetrachloride at low concentrations.Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 8, pp. 1050–1053, August, 1981. 相似文献
4.
The reaction of benzoxazole-2-thione and benzoxazol-2-one with substituted cyanoacetylenes was studied. 2-[(3-Phenyl-2-propenenitrile)thio]benzoxazole was obtained by the reaction of benzoxazole-2-thione with phenylcyanoacetylene. Benzoxazol-2-one with phenylcyanoacetylene and a tertiary cyanoacetylenic alcohol gave the corresponding N-adducts.Translated from Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, No. 6, pp. 1390–1391, June, 1990. 相似文献
5.
N. D. Abramova L. V. Andriyankova Yu. M. Skvortsov A. G. Mal'kina é. I. Kositsyna A. I. Albanov G. G. Skvortsova 《Chemistry of Heterocyclic Compounds》1986,22(10):1145-1148
Substituted 1,3-thiazinoazoles were obtained by treating benzimidazole-2-thione, 4,5-diphenylimidazole-2-thione, and 1,2,4-triazole-3-thione with tertiary cyanoacetylenic alcohols and their acetals in the presence of lithium hydroxide. Treatment of the 1,3-thiazinobenzimidazoles with base destroyed the thiazino ring forming benzimidazol-2-one.Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 10, pp. 1412–1415, October, 1986. 相似文献
6.
7.
8.
B. V. Trzhtsinskaya é. I. Kositsyna B. Z. Pertsikov E. V. Rudakova V. K. Voronov G. G. Skvortsova 《Chemistry of Heterocyclic Compounds》1987,23(2):228-231
Addition of 1-chloro-2,3-epoxypropane to 1,2,4-triazole-3-thiones depending on the ratio of the reactants leads to the formation of 3-(1-chloro-2-hydroxypropyl)-3-(1-chloro-2-hydroxypropylthio)-1,2,4-triazoles. 3-Hydroxy-1,2,4-triazolo[2,3-b] tetrahydro-1,3-triazines have been synthesized by intramolecular cyclization of the monoadducts.Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 2, pp. 271–274, February, 1987 相似文献
9.
B. A. Trofimov N. A. Nedolya M. Ya. Khil'ko V. B. Modonov É. I. Kositsyna V. M. Bzhezovskii G. A. Gareev 《Chemistry of Heterocyclic Compounds》1984,20(8):846-849
The direct vinylation of 3,4-di(hydroxymethyl)-1,2,5-oxadiazole by acetylene was accomplished for the first time; its mono- and divinyl ethers were synthesized in the presence of cadmium acetate. The physicochemical and spectral properties and conformational structure of the synthesized compounds were studied. It was shown that the s-trans-trans-conformation is the most profitable for the divinyl ether of 3,4-di(hydroxymethyl)-1,2,5-oxadiazole.Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 8, pp. 1044–1047, August, 1984. 相似文献
10.
G. M. Gavrilova É. I. Kositsyna B. A. Trofimov V. I. Gostevskaya S. V. Amosova 《Chemistry of Heterocyclic Compounds》1982,18(5):465-469
The acylation of 2H,6H-2,6-dimethyl-4-amino-1,3,5-dithiazine with the chlorides and anhydrides of saturated carboxylic and sulfonic acids leads to N-monoacyl derivatives of dithiazine in 85–96% yields. It was established by IR and UV spectroscopy that 2H,6H-2,6-dimethyl-4-acylamino-1,3,5-dithiazines with donor substituents exist primarily in the amino form and that the equilibrium is shifted to favor the imino form for compounds with acceptor substituents to a greater degree in solutions than in the crystalline state.Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 5, pp. 622–626, May, 1982. 相似文献