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Butadiyne, HC≡CC≡CH, can be obtained in yields up to ~90% by adding 1,4-dichloro-2-butyne, CICH2C≡CCH2CI at ~70°C to a mixture of concentrated aqueous potassium hydroxide and dimethylsulfoxide. 相似文献
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YU Li-Zhi XU Ke-Xin MENG Ji-Ben HUANG Yao-Dong ② a 《结构化学》2007,26(8):939-944
Bis(diphenylphosphinyl)butadiyne reacted with methylcyclopentadiene at room tem- perature and four isomeric products were obtained. Crystal structures of isomers 1 and 3 have been determined. Crystal data for compound 1 C40H36O2P2·2CHCl3: monoclinic, space group C12/c1 with a = 17.983(2), b = 11.8723(12), c = 20.081(2) , β = 111.218(3)°, V = 3996.5(8) 3, Z = 4, Mr = 849.36, Dc = 1.412 g/cm3, F(000) = 1752, μ = 0.546 mm-1, the final R = 0.0351 and wR = 0.0951 for 3965 observed reflections (I > 2σ(I)); and those for compound 3 C40H36O2P2·H2O: triclinic, space group P1 with a = 10.4144(15), b = 13.0558(18), c = 13.742(2) , α = 70.453(8), β = 75.382(8), γ = 72.312(8)°, V = 1653.7(4) 3, Z = 2, Mr = 628.64, Dc = 1.262 g/cm3, F(000) = 664, μ = 0.169 mm-1, the final R = 0.0593 and wR = 0.1296 for 4891 observed reflections (I > 2σ(I)). The structures of the other two isomers are identified via IR, 1H NMR and MS spectra. 相似文献
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Intramolecular Cyclization of Butadiyne Functionalized Ligands coordinated to Triosmium‐Carbonyl Cluster
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Avelina Arnanz Rosa‐María Medina María‐José Macazaga Consuelo Moreno 《无机化学与普通化学杂志》2016,642(19):1104-1111
Reactions between diynes and [Os3(CO)11(CH3CN)] in the presence of water give rise to the formation of intriguing hydride triosmium clusters [Os3(μ‐H)(CO)9{μ3,η1:η3:η1‐RC2COHC≡CR}] ( 1a – 1c ) under mild conditions in high yields. When these allylic alcohol compounds 1a – 1c are dissolved in dry polar and donor solvents, an intramolecular cyclization process takes place to give [Os3(μ‐H)(CO)9{μ3,η1:η3:η1‐RC2CH=COCR}] ( 2a – 2c ) in quantitative yield. The utilization of [Os3(CO)11(CH3CN)] as starting material together with the addition of water can replace the inconvenient use of [Os3(μ‐H)2(CO)10]. This method of synthesis provides a facile pathway for diyne cyclizations and has a clear advantage over those described to date in the literature. Additionally, the analogous cyclized mixed‐metal complex [Os3(μ‐H)(CO)9{μ3,η1:η3:η1‐FcC2CH=COCFc}] ( 2d ) (Fc = ferrocenyl), was synthesized in order to carry out a comparative electrochemical study with the related compounds [Os3(CO)11(μ3‐FcC4Fc)] ( I ) and [Os3(CO)10(μ3‐FcC4Fc)] ( II ), which were previously reported by R. D. Adams. 相似文献
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Zirconaindene derivatives produced benzocyclobutadiene derivatives in situ in the presence of CuCl and 1,4-naphthoquinone, which afforded their dimers, 6a,10b-dihydrobenzo[a]biphenylenes and dibenzosemibullvalenes or dibenzo[a,e]cycloctenes. 相似文献
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L. T. Eremenko L. B. Romanova V. S. Malygina L. S. Barinova 《Russian Chemical Bulletin》2008,57(2):406-408
Efficient method for the synthesis of cubane-1,4-dicarboxylic and 4-bromocubane-1-carboxylic acid N-(morpholinomethyl)amides has been elaborated.
For Part 8, see Ref. 1.
Published in Russian in Izvestiya Akademii Nauk. Seriya Khimicheskaya, No. 2, pp. 396–398, February, 2008. 相似文献
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An efficient procedure was developed for the preparation of 1,4-cubanedicarboxylic acid dihydrazide (1). Its reactions with acetic anhydride, aromatic aldehydes, and acetylacetone were studied. 相似文献
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Yu. I. Smushkevich V. E. Zhigachev A. V. Sulima N. N. Suvorov 《Chemistry of Heterocyclic Compounds》1970,6(8):997-998
The reaction of gramine methiodide with the sodium or potassium derivatives of -oxo sulfoxides leads to the formation of skatyl-substituted sulfoxides. When the latter are cleaved with amalgamated aluminum, skatyl-substituted ketones are obtained.For Communication V, see [4].Translated from Khimiya Geterotsiklicheskikh Soedinenii, Vol. 6, No. 8, pp. 1069–1070, August, 1970. 相似文献
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N. N. Suvorov V. S. Velezheva V. V. Vampilova E. N. Gordeev 《Chemistry of Heterocyclic Compounds》1974,10(4):447-449
5-Substituted (butyl, phenyl)-5-skatyl(5-methoxyskatyl)barbituric acids were obtained by alkylation of the corresponding barbituric acids with gramine and 5-methoxygramine in dimethylformamide and dimethyl sulfoxide. 5,5-Dialkylation products were obtained in the alkylation of barbituric and thiobarbituric acids with gramine. 相似文献
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S. Z. Kaplan N. A. Zakharova A. S. Zvontsova N. V. Khromov-Borisov S. P. Kozhevnikov L. V. Pavlyuchenkova 《Chemistry of Heterocyclic Compounds》1974,10(10):1146-1150
The β-oxide ring of 3-alkyl-3-(N-morpholinomethyl)oxacyclobutanes is opened to give methiodides or hydrohalide salts, respectively, of 2-alkyl-2-(N-morpholinomethyl)-3-halopropanol when they are heated with methyl iodide in methanol under pressure or heated with hydrohalic acids. When two morpholinomethyl groups are present in the 3 position of the oxacyclobutane ring, it is not opened. 相似文献
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V. P. Shchipanov K. I. Krashina A. A. Skachilova 《Chemistry of Heterocyclic Compounds》1973,9(11):1423-1426
A series of 5-aryl-3-phenyl-1-(tetrazol-5-yl)formazans has been obtained by the azo coupling reaction. In an aqueous alkaline medium they are oxidized to tetrazolium salts with a betaine structure. Information is given on the electronic spectra of the formazans and the tetrazolium salts and the acidic properties and complex-forming capacity of the formazans.For Communication VII, see [1].Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 11, pp. 1570–1573, November 1973. 相似文献
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L. T. Eremenko L. B. Romanova M. E. Ivanova A. V. Shastin I. L. Eremenko S. E. Nefedov 《Russian Chemical Bulletin》1998,47(3):441-446
New esters of 1,4-cubanedicarboxylic acid, 1,4-(ROCO)2C8H6 (R=Et (3a), Pr (3b), CMe3 (3c), C6H13 (3d), CH2CF3 (3e), or CH(CF3)2 (3f) were synthesized. The structures of esters3a, 3b, 3e, and3f were established by X-ray diffraction analysis. The cubane framework of compound3b is somewhat distorted, whereas the C−C bond lengths and bond angles in the other compounds remain virtually ideal.
For Part 1, see Ref. 1.
Translated fromIzvestiya Akademii Nauk. Seriya Khimicheskaya, No. 3, pp. 457–462, March, 1998. 相似文献
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L. I. Zamyshlyaeva N. N. Mitina N. N. Suvorov 《Chemistry of Heterocyclic Compounds》1970,6(6):707-709
The influence of dehydrogenating dehydrating (deaminating) additives on the composition and yield on the products of the cyclization of N-(-hydroxyethyl)aniline and N,N-diphenylethylenediamine has been studied. The closure of the indole and pyrrole rings takes place through the dehydration and deamination, respectively, of the starting material on oxide catalysts. A reaction scheme explaining the formation of all the products observed has been suggested.For Communication L see [1].Translated from Khimiya Geterotsiklicheskikh Soedinenii, Vol. 6, No. 6, pp. 766–769, June, 1970. 相似文献
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L. A. Aksanova N. F. Kucherova S. L. Portnova V. A. Zagorevskii 《Chemistry of Heterocyclic Compounds》1967,3(6):825-828
The Fischer cyclization of arylhydrazones of 4-thiepanone leads to 1, 3, 6H, 4, 5-dihydrothiepino[4, 3-c]indoles, while the cyclization of arylhydrazones of the S, S-dioxide of 4-thiepanone forms 6H-1, 2, 4, 5-tetrahydrothiepino[5, 4-c]indole.For communication XXIV, see [1]. 相似文献
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The synthesis of-glycerides of 3-indolyl carboxylic acids has been effected by the reaction of 3-indolyl carboxylic acids with benzylideneglycerol in the presence of dicyclohexylcarbodiimide with the subsequent elimination of the benzylidene group by hydrogenolysis. The- and-glycerides have been separated by paper chromatography.For communication XXX, see [1]. 相似文献
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A comparative study of the dehydrogenation of azaindoles by chemical (under the action of quinones) and electrochemical (anode polarography at a rotating platinum disc electrode) methods has been made. The influence of substituents in positions 1 and 6 of the azaindole molecule on the ease of oxidation of the compounds has been investigated. The results are discussed using the method of correlation equations.For part XXVII, see [16]. 相似文献
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A new heterocyclic system — 12H-6,7-dihydrobenz[2,3]oxepmo[4,5-b] indole — and a number of its substituted derivatives were synthesized by Fischer cyclization of 5-homochromanone arylhydrazones.See [1] for communication XXXIV.Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 1, pp. 65–67, January, 1971. 相似文献