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1.
2-Allylcyclopentane-1-thiol is cyclized by treatment with 75% sulfuric acid and with UV light to 2-methyl-1-thiabicyclo[3, 3, 0]octane and 1-thiabicyclo[4, 3, 0]nonane, respectively. The cyclization is stereospecific.For Part I, see [1].Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 9, pp. 1185–1187, September, 1970. 相似文献
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We examined the scope of the previously reported one-pot synthesis [1] of chromone-3-sulfonylureas. Different anilines and heterocyclic amines were thereby reacted with chlorosulfonyl isocyanate-derived chlorosulfonylureas. These were treated with different enaminones and enamines to provide the title compounds. 相似文献
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Vara Prasad JV 《Organic letters》2000,2(8):1069-1072
[formula: see text] A simple synthesis of heterocyclic thiosulfonates containing indole, indoline, benzoimidazole, and quinoxaline rings is described. The synthesis of these thiosulfonates involves the preparation of the appropriately substituted thiols followed by sulfonylation to give thiosulfonates. The corresponding thiols were prepared in a simple and efficient manner by using a thiocyanation reaction either prior to heterocycle ring formation or after heterocycle ring formation. These thiosulfonates were coupled successfully to the 5,6-dihydropyran-2-one ring to give products that showed excellent HIV protease activity. 相似文献
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几个硫杂环配体的合成 总被引:3,自引:0,他引:3
4,5—二硫基—1,3—二硫杂戊烯—2—硫酮[dmit]的锌配合物与有机卤化物 反应,合成了含有吸电子基的1,3—二硫杂戊烯—2—硫酮的配体,用IR,^1H NMR,MS等表征了其结构. 相似文献
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1,3-Dipolar cycloaddition reactions of methylenepyrrolidinones with nitrilimines or nitrones resulted in regio and stereoselective formation of respective spiropyrazolines or spiroisovazolidines.Department of Organic Chemistry, Slovak Technical University, Radlinského 9, 81237 Bratislava, Slovak Republic. Published in Khimiya Geterotsiklicheskikh Soedinenii, No. 10, pp. 1353–1355, October, 1995. Original article submitted August 24, 1995. 相似文献
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We have investigated the 1,3-dipolar cycloaddition of dehydrobenzene, N-phenyl-maleimide, and diethyl acetylenedicarboxylate to phthalimidoalkyl diazomethyl ketones, and have obtained phthalimide derivatives of amino ketones of the indazole, pyrazole, and pyrrolo[3,4-d]-2-pyrazoline series.Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 1, pp. 78–81, January, 1984. 相似文献
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10-Benzyl-9,10-dihydroanthracen-9-ols, having high electron densities in the benzene ring, exhibit in the presence of acid a transannular ring closure to the corresponding homotriptycenes in almost quantitative yields. Since the starting compounds are easily accessible from 9(10H)-anthracenone, this process represents the most facile route to such pentacyclic systems. An electron-releasing methoxy group enables the intramolecular electrophilic substitution in its para position. In the absence of such an activation, a number of alternative processes can occur, namely the acid-catalyzed dehydration to anthracene derivatives with (R not = H) or without (R = H) rearrangement or a disproportionation reaction of the secondary alcohol to the corresponding ketone and hydrocarbon. 相似文献
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A new condensed heterocyclic system, viz., 1,3,7,9-tetra-oxo-2,8-diphenyl-6-formylpyrimido [3,4-a]pyrimido[4,5-dloxazine, was synthesized, and its electronic and PMR spectra were recorded. Factors that affect the orientation of nucleophilic substitution in betaines of the pyrimidine series with aliphatic amines are discussed.Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 7, pp. 993–995, July, 1980. 相似文献
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S. S. Novikov 《Russian Chemical Bulletin》1979,28(10):2083-2099
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Liping Deng Zhang Yong Weifeng Tao Jianfeng Shen Wei Wang 《Journal of heterocyclic chemistry》2011,48(4):808-813
Twenty novel norcantharidin derivatives, which were substituted by thiazole ring, were synthesized in a single step by the [3+2] 1,3‐dipolar cycloaddition reaction with oxime or hydrazone in the presence of chloramine‐T when compared with the conventional method. J. Heterocyclic Chem., (2011). 相似文献
17.
Kenji Mori 《Journal of heterocyclic chemistry》1996,33(5):1497-1517
Chemistry and biology of oxygen heterocycles as insect pheromones are reviewed referring to exo-brevicomin, disparlure, japonilure and olean. Synthesis of koninginin A, a microbial metabolite, is discussed. Two azetidine alkaloids, penaresidin A and penazetidine A, were synthesized. 相似文献
18.
Rusanov A. L. Plieva L. Kh. Kereselidze M. K. Korshak V. V. 《Chemistry of Heterocyclic Compounds》1977,13(9):1029-1032
Two new diamines — [1,3-bis(5-phenyl-1,2,4-triazol-3-yl)-4,6-diamino]benzene and [1,3-di-(2-benzimldazolyl)-4,6-diamino]benzene — were synthesized from 4,6-dinitroisophthalic acid. Newheterocyclic systems — 3,5,9,11-tetraphenyl[benzo[1,2-a; 4,5-a]bis(1,2,4-triazolo[4,3-c]pyrimidine)] and 2,16-diphenyl[benzo[1,2-a;4,5-a']bis(pyrimido[1,6-a]benzimidazole)]—were obtained by reaction of the diamines with benzoyl chloride and subsequent cyclization.Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 9, pp. 1274–1277, September, 1977. 相似文献
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The oxidative azidation reactions of C-nitro-substituted saturated heterocyclic compounds, viz., the nitro derivatives of oxetane, azetidine, 1,3-dioxane, tetrahydro-1,3-oxazine, and hexahydropyrimidine, were investigated.
A novel representatives of the geminal nitro azides were prepared and their physicochemical properties were studied. The process
of the formation of the geminal dinitro compounds upon oxidative azidation was analyzed. 相似文献
20.
I. A. Ol'shevskaya V. Ya. Pochinok L. F. Avramenko 《Chemistry of Heterocyclic Compounds》1971,4(5):649-651
5-Azido-2-methylbenzthiazole, 6-azido-1, 2-dimethyl-, and 5-azido-2-methyl-1-phenylbenzimidazoles were prepared. By the reactions of these azides with alkyl halides the quaternary slats based on the cyanine dyes were obtained. 相似文献