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41.
The interaction of oxygen of water and central oxygen of ozone produces stable H2O‐O3 complex with no barrier. With decomposition of this complex through H‐abstraction by O3 and O‐abstraction by H2O, four possible product channels have been found. The reaction of mercury and the products of water‐ozone reaction have been studied. All geometrical and AIM parameters of intermediate, transition states, and the products of reactions are calculated and thermodynamic parameters are obtained. The negative value of free energy show that channels Hg+H2OO, Hg+H2O2 and Hg+H2O4 in hydrogen tetroxide form (HTO) may be the main reaction channels. 相似文献
42.
Issa Yavari Samereh Seyfi Manijeh Nematpour Zinatossadat Hossaini 《Helvetica chimica acta》2010,93(7):1413-1417
A one‐pot synthesis of dialkyl 1,3a,4,8b‐tetrahydro‐3a,8b‐dihydroxy‐1‐alkyl‐4‐oxoindeno[1,2‐b]pyrrole‐2,3‐dicarboxylates via three‐component reaction from indan‐1,2,3‐trione hydrate (ninhydrin), primary amines, and dialkyl acetylenedicarboxylates is described. 相似文献
43.
An efficient synthesis of alkyl 5-(dialkoxy- phosphoryl)-1,3-dimethyl-2, 6-dioxo-hexahydropyrimidine-4-carboxylates is described.
This involves the reaction of N,N′-dimethylurea and dialkyl acetylendicarboxylates in the presence of trialkyl phosphites. Under similar conditions, triphenyl
phosphite led to alkyl 5-(diphenoxyphosphoryl)-1,3-dimethyl-2,6-dioxo-hexahydro-4-pyrimidinecarboxylates. 相似文献
44.
Ketenimine intermediates generated by the addition of copper acetylides to sulfonyl azides are trapped by (p‐toluenesulfonyl)methyl isocyanide (TsCH2NC), in the presence of Et3N, to afford functionalized pyrroles in moderate‐to‐good yields. 相似文献
45.
Copper‐Catalyzed Synthesis of Pentasubstituted Pyridines from N‐Sulfonyl Ketenimines, 1,1,3,3‐Tetramethylguanidine,and Acetylene Dicarboxylates 下载免费PDF全文
Regioselective synthesis of pentasubstituted pyridines has been developed in moderate‐to‐good yields by the reaction of sulfonyl azides, alkynes, and a dialkyl acetylenedicarboxylate? tetramethylguanidine adduct catalyzed by CuI in MeCN at room temperature. 相似文献
46.
47.
Manijeh Nematpour Elham Rezaee Mehdi Jahani Sayyed Abbas Tabatabai 《Journal of heterocyclic chemistry》2019,56(4):1254-1259
The one‐pot synthesis of a novel class of substituted quinoline derivatives with good yields is achieved via the Cu‐catalyzed intramolecular C─H activation reaction between isocyanides, aniline, and acetylene dicarboxylate in MeCN at room temperature. The existence of one‐pot conditions, availability of a starting material‐catalyst, the absence of column chromatography, and a high yield of products are among the advantages of this method. The structures are confirmed spectroscopically (1H NMR and 13C NMR, IR, and EI‐MS) and through elemental analyses. 相似文献