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文章名     作者     期刊名     摘要     卷     期         如果没有找到您所需要的文献，请点击 ——此处申请     共28条记录   Synthesis of pyrazoles, diazepines, enaminones, and enamino esters using 12-tungstophosphoric acid as a reusable catalyst in water. [作者：Chen, Xiang;She, Jin;Shang, Zhicai;Wu, Jun;Wu, Haifeng;Zhang, Peizhi;,期刊：Synthesis, 页码：3478-3486 , 文章类型： 研究论文，,卷期：2008年-21] recyclable catalyst in promoting a chemo- and regioselective condensation of hydrazines/hydrazides, diamines, and primary amines with various 1,3-dicarbonyl compds. in pure water at room temp. to afford pyrazoles, diazep... Asymmetric Diels-Alder reactions of sulfonyl-functionalized a,b-unsaturated ketones with cyclopentadiene catalyzed by chiral Lewis acid. [作者：Pei, Wen;Wang, Yu-Guang;Wang, Yong-Jiang;Sun, Li;,期刊：Synthesis, 页码：3383-3388 , 文章类型： 研究论文，,卷期：2008年-21] Asym. Diels-Alder reactions of (E)-1-(methyl/arylsulfonyl)-3-penten- 2-ones with cyclopentadiene catalyzed by a chiral Ti reagent were investigated. The enantioselectivity was studied with different substituents in the ... A novel, simple cyclocondensation reaction towards glycosyl triazines. [作者：Kikelj, Vincent;Julienne, Karine;Janvier, Pascal;Meslin, Jean-Claude;Deniaud, David;,期刊：Synthesis, 页码：3453-3460 , 文章类型： 研究论文，,卷期：2008年-21] Sugars bearing an isothiocyanate moiety at C(1) react with diaza-dienium iodide to afford glycosyl triazines, which represent, through an easy cyclocondensation step, a flexible entry to different nucleoside analogs. He... Synthetic studies towards the development of psoralen-acidic retinoid conjugates and hybrids. [作者：Militsopoulou, Maria;Bariamis, Stavros E.;Athanassopoulos, Constantinos M.;Papaioannou, Dionissios;,期刊：Synthesis, 页码：3433-3442 , 文章类型： 研究论文，,卷期：2008年-21] The chem. modification of trioxsalen using electrophilic arom. substitution reactions, followed by either Wittig or Heck reactions or Suzuki coupling, allowed for ready access to C(4') modified trioxsalen derivs., which ... Cyano-substituted 2-carboxyimidazoles: synthesis of 4-cyano-1-{[2-(trimethylsilyl)ethoxy]methyl}-1H-imidazole-2-carboxylate potassium salt. [作者：Wall, Mark J.;Schubert, Carsten;Illig, Carl R.;,期刊：Synthesis, 页码：3377-3379 , 文章类型： 研究论文，,卷期：2008年-21] The first example of a monocyano-substituted 2-carboxyimidazole is reported. A synthesis of potassium 4-cyano-1-{[2-(trimethylsilyl)ethoxy]methyl}-1H-imidazole-2-carboxylate is demonstrated where the carboxyl group is i... A new synthesis of N,N'-bis(dimethylaminomethylene)hydrazine. [作者：Kantlehner, Willi;Mezger, Jochen;Stoyanov, Edmont V.;Leonhardt, Sylvia;,期刊：Synthesis, 页码：3380-3382 , 文章类型： 研究论文，,卷期：2008年-21] (N:CHNMe2)2 was synthesized in a 1-step procedure from (NHCHO)2 and Me3COCH(NMe)2 (Bredereck-Simchen reagent) or DMF-DMA. Superelectrophilic intermediates in the synthesis of novel indenole derivatives via 1,5-cyclization reactions of 5-aryl-1-azapenta-1,4-dien-3-ones. [作者：Ghavtadze, Nugzar;Froehlich, Roland;Bergander, Klaus;Wuerthwein, Ernst-Ulrich;,期刊：Synthesis, 页码：3397-3406 , 文章类型： 研究论文，,卷期：2008年-21] Oximes of 5,5-disubstituted 1-azapenta-1,4-dien-3-ones underwent 1,5-cyclization reactions yielding indenole derivs. in moderate to good spin-component-scaled MP2 method yields upon treatment with an excess of trifluorom... Magnesium-cadmium chloride, a bimetallic catalyst system for the allylation of aldehydes with allyl bromide: an efficient protocol for the synthesis of homoallylic alcohols. [作者：Narsaiah, A. Venkat;Reddy, A. Ramesh;Rao, Y. Gopala;Kumar, E. Vijay;Prakasham, R. S.;Reddy, Basi V. Subba;Yadav, Jhillu S.;,期刊：Synthesis, 页码：3461-3464 , 文章类型： 研究论文，,卷期：2008年-21] A simple and efficient procedure for the allylation of aldehydes was developed using the magnesium-cadmium chloride reagent system. This bimetallic catalytic system works well in a THF-H2O solvent medium. A variety of a... Facile conversion of dithioesters into carboxylic acids or esters using alkaline hydrogen peroxide. [作者：Grellepois, Fabienne;Portella, Charles;,期刊：Synthesis, 页码：3443-3446 , 文章类型： 研究论文，,卷期：2008年-21] Simple, mild, and environmentally friendly procedures for the direct conversion of dithioesters into either carboxylic acids or esters using H2O2 under alk. conditions are described. A general and highly efficient synthesis of novel nonactic acid analogues. [作者：Coutable, Ludovic;Saluzzo, Christine;,期刊：Synthesis, 页码：3389-3396 , 文章类型： 研究论文，,卷期：2008年-21] An efficient enantioselective synthesis of protected nonactate analogs, starting from an easily accessible b-keto ester, is described. The key steps of the strategy are asym. hydrogenation, chelation-controlled allylati... FeCl3.6H2O as a versatile catalyst for the esterification of steroid alcohols with fatty acids. [作者：Komura, Kenichi;Ozaki, Akiyoshi;Ieda, Noboru;Sugi, Yoshihiro;,期刊：Synthesis, 页码：3407-3410 , 文章类型： 研究论文，,卷期：2008年-21] FeCl3.6H2O is an active catalyst for the esterification of sterols with fatty acids under azeotropic reflux in mesitylene as solvent. New approach for complete reversal of enantioselectivity using a single chiral source. [作者：Tanaka, Takanori;Hayashi, Masahiko;,期刊：Synthesis, 页码：3361-3376 , 文章类型： 综述，,卷期：2008年-21] A review. Obtaining both enantiomers of a given compd. in high enantiomeric excess is an attractive and important challenge, because it is often the case that each enantiomer exhibits different bioactivity. This review ...