共查询到20条相似文献,搜索用时 10 毫秒
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Vchislo Nadezhda V. Verochkina Ekaterina A. 《Chemistry of Heterocyclic Compounds》2022,58(8-9):384-393
Chemistry of Heterocyclic Compounds - The methods for the synthesis of quinoline and its hydrogenated derivatives from α,β-unsaturated aldehydes have been summarized for the first time.... 相似文献
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Yu. B. Salamonov O. A. Luk'yanov A. G. Bass Yu. A. Strelenko 《Russian Chemical Bulletin》1994,43(11):1860-1863
Previously unknownN-dinitroalkyl-NNO-azoxybenzenes have been prepared (by nitration ofN-(-hydroximino) alkyl-NNO-azoxybenzenes) and transformed to some derivatives.Translated fromIzvestiya Akademii Nauk. Seriya Khimicheskaya, No. 11, pp. 1972–1975, November, 1994 相似文献
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Azadeh Nakhai 《Tetrahedron》2009,65(11):2298-9445
The reaction of hydrazine derivatives with α,β-unsaturated ketones, such as cyclohexenyl(phenyl)methanone and (E)-2-benzylidenecyclohexanone, were investigated.The reaction between methylhydrazine and e.g., cyclohexenyl(phenyl)methanone was particularly interesting as 3a,4,5,6,7,7a-hexahydro-1-methyl-3-phenyl-1H-indazole was obtained as the major product together with 4,5,6,7-tetrahydro-2-methyl-3-phenyl-2H-indazole as a minor product. 相似文献
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Russian Chemical Bulletin - Starting from methyl trifluoropyruvate, α-CF3-substituted α-methoxy-α-(furan-2-yl) acetic acids and their derivatives and also methyl... 相似文献
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Summary By the reaction of dialkyl esters of -hydroxy, ,-trichloroethylphosphonic acid and acetic anhydride in the presence of a few drops of sulfuric acid, the dialkyl esters of -acetoxy-,,-trichloroethylphosphonic acid were obtained in high yields. 相似文献
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Shubham Sharma Virender Singh Vaishali Rakesh Kumar Rahul Jamra Naveen Banyal Jyoti 《Journal of heterocyclic chemistry》2024,61(2):232-284
The synthesis of pyrazole derivative using α,β-unsaturated carbonyl compounds has attracted increasing attention of the synthetic organic chemist community. Interestingly, the simplicity of the synthetic method, high reactivity, and ease of incorporating diversity into the desired prototype have contributed a lot toward the exploration of α,β-unsaturated carbonyl compounds by various research groups. Due to the tremendous pharmacological significance of pyrazole derivatives, their synthesis has been one of the leading research frontiers in recent years. As prime examples, sildenafil, zometapin, Celebrex, and rimonabant have been successfully commercialized in the market to treat various life-challenging diseases. Considering the great profile of α,β-unsaturated carbonyl compound in the synthesis of biologically active pyrazole derivatives, this review incorporates contemporary literature (2011–2022) on the synthesis of pyrazole and its derivatives using α,β-unsaturated carbonyl compound as a starting precursor. 相似文献
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N. M. Karpiak H. A. Marshalok M. D. Fedevich I. K. Avdosieva Ya. P. Kovalskyi 《Chemistry of Heterocyclic Compounds》2008,44(11):1334-1338
Dimers of methacrolein and α-ethylacrolein have been obtained and undergo a Cannizzaro reaction to the corresponding pyran
alcohols and sodium salts of pyran acids. Their bacteriostatic, bactericidal, and fungicidal properties have been studied.
Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 11, pp. 1639–1644, November, 2008. 相似文献
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《Tetrahedron letters》1987,28(37):4323-4326
A new red-ox reaction, leading to the respective keto derivatives from α-ketol and enone derivatives of cyclohexanone, is reported. 相似文献
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A. M. Zvonok V. Librando E. B. Okaev S. G. Mikhalyonok 《Chemistry of Heterocyclic Compounds》1998,34(5):554-557
The cycloaddition reaction of benzonitriliop-nitrophenylmethanide to , -unsaturated epoxy ketones gives a mixture of stereoisomeric epoxycarbonyl pyrrolines. Only one of the isomers was isolated as pure compound. The structure, stereo- and regiochemistry of the isolated products was established by NMR and NOE measurements as well as by mass spectral data.Department of Organic Chemistry, Belarus State University of Technology, Minsk 220630, Belarus, Dipartimento di Scienze Chimiche, Universita, 95125, Catania, Italy. Published in Khimiya Geterotsiklicheskikh Soedinenii, No. 5, pp. 630–633, May, 1998. 相似文献
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Summary By the action of sodium in xylene on polychloro hydrocarbons containing -CCl2-CCl2- or- CC1=CC1-, groupings the corresponding symmetrical acetylenic hydrocarbons containing 10,14, and 18 carbon atoms in the molecule were obtained. From ,-disubstituted tetrachloroalkanes by the same method 1,10-diethoxy-5-decyne, 1,14-diethoxy-7-tetradecyne, and 1,14-bisdiethylamino-7-tetradecyne were obtained.The spectra were determined in the Optical Laboratory of the Institute of Heteroorganic Compounds of the USSR by N. A. Chumaevskii, who we thank. 相似文献
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A. M. Turuta A. V. Kamernitskii N. V. Dzhlantiashvili L. K. Kavtaradze A. A. Korobov 《Russian Chemical Bulletin》1991,40(5):1063-1066
A new and more effective sequence of reactions is proposed for the production of 16,17-isopropylidenedioxy-5-pregnane-3,21-diol-20-one. It uses methods previously unused for 5-H-steroids and involves 21-hydroxylation of 16,17-epoxy-5-pregnan-3-ol-20-one with diacetoxyiodobenzene and cis-opening of the obtained 21-hydroxy-16,17-epoxy-5-pregnane-3,21-diol-20-one by acetic acid in the presence of epoxycarbonylhydrazine, followed by condensation of the obtained product with acetone.Translated from Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, No. 5, pp. 1185–1188, May, 1991. 相似文献
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The interaction of cyclopentanone, 2-cyclopentenone, 1,3-cyclopentanedione, 3-methyl-1,2-cyclopentanedione, γ-butyrolactone, 2(5H)-furanone, ascorbic acid, and 5,6-O-isopropylidenyl-2,3-O-dimethylascorbic acid with α-hydroxyethyl radicals (α-HER) generated during the radiolysis of deaerated ethanol has been studied in the continuous irradiation mode. The test compounds, except γ-butyrolactone, oxidize α-HER. 2(5H)-Furanone and 2-cyclopentenone give hydroxyethylation products via the free-radical chain mechanism. In contrast to 2(5H)-furanone and 2-cyclopentenone, ascorbic and 5,6-O-isopropylidenyl-2,3-O-dimethyl-L-ascorbic acids are weaker oxidants for α-HER and attach these radicals at the multiple carbon-carbon bonds. 相似文献
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《Tetrahedron》1996,52(25):8611-8618
Sodium hydrogen telluride reacts chemoselectively with α,β-unsaturated nitriles and α-halonitriles linked to aromatic and aliphatic substituents to give the corresponding saturated nitriles with good yields. 相似文献
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ZhengChangXIONG LuLingWU XianHUANG 《中国化学快报》2004,15(4):386-388
Hydrozirconation of 1-alkylnylphosphonates gives the organozirconium(Ⅳ) complexes 2 in syn-addition way.Complexs 2 was trapped with NCS,NBS or I2 to afford stereodifined α-halo-1-alkenylphosphonates in moderate to high yields. 相似文献