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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34条记录   6-Exo cyclizations of 2-indolylacyl radicals: access to the uleine alkaloid skeleton. [作者：Bennasar, M.-Lluisa;Roca, Tomas;Garcia-Diaz, Davinia;,期刊：SYNLETT, 页码：1487-1490 , 文章类型： 研究论文，,卷期：2008年-10] A new straightforward approach to the bridged framework (e.g. I) of uleine alkaloids, based on the 6-exo cyclization of selenoester-derived 3-(tetrahydropyridin-2-yl)indoline-2-carbonyl radicals under reductive condition... A general and efficient route to 3-O-modified carbohydrate bis(oxazoline) ligands. [作者：Minuth, Tobias;Boysen, Mike M. K.;,期刊：SYNLETT, 页码：1483-1486 , 文章类型： 研究论文，,卷期：2008年-10] ligands with 3-O substituents of varying steric demand is described. The synthesis of the new ligands proceeds via a thioglucoside key intermediate. The double cyclization to the desired bis(oxazolines) is initiated wit... Scandium(III) fluoride as a novel catalyst for hydroxymethylation of dimethylsilyl enolates in aqueous media. [作者：Kokubo, Masaya;Kobayashi, Shu;,期刊：SYNLETT, 页码：1562-1564 , 文章类型： 研究论文，,卷期：2008年-10] Hydroxymethylation of dimethylsilyl (DMS) enolates using aq. formaldehyde soln. was catalyzed by scandium(III) fluoride (ScF3) in aq. media to give the corresponding b-hydroxy ketones in good to excellent yields. While ... Direct one-pot synthesis of 2,3-diarylbuta-1,3-diene via self-coupling of acetophenones. [作者：Li, Jian;Li, Shaoyu;Jia, Xueshun;,期刊：SYNLETT, 页码：1529-1531 , 文章类型： 研究论文，,卷期：2008年-10] A mild and straightforward route to 2,3-diarylbuta-1,3-diene is described here. By treatment with SmI2-Ac2O, acetophenone and its analogs underwent self-coupling reactions and subsequent elimination to give a series of ... Efficient direct alkynylation of trifluoromethyl ketones catalyzed by AgF in water and organic solvents. [作者：Deng, Guo-Jun;Li, Chao-Jun;,期刊：SYNLETT, 页码：1571-1573 , 文章类型： 研究论文，,卷期：2008年-10] A general and efficient method for the direct alkynylation of alkyl trifluoropyruvate and trifluoroacetophenone in water was developed by using AgF and tricyclohexylphosphine as a catalyst. The ligand enhanced the catal... Total synthesis of the resorcyclic lactone-based kinase inhibitor L-783277. [作者：Hofmann, Tatjana;Altmann, Karl-Heinz;,期刊：SYNLETT, 页码：1500-1504 , 文章类型： 研究论文，,卷期：2008年-10] The total synthesis of the natural product L-783277 I (RR1 = O) was accomplished based on the convergent assembly of appropriate building blocks. Key steps are the Suzuki coupling of olefin II and 2-trimethylsilylethyl ... Synthesis of the central tryptophan-leucine residue of celogentin C. [作者：Michaux, Julien;Retailleau, Pascal;Campagne, Jean-Marc;,期刊：SYNLETT, 页码：1532-1536 , 文章类型： 研究论文，,卷期：2008年-10] The synthesis of the central tryptophan residue of celogentin C is described featuring a Pd-catalyzed imine/enamine Heck-type reaction, a Pd-catalyzed Suzuki coupling, and an asym. Rh-catalyzed hydrogenation. Recent developments on hemilabile P,O-type ligands in cross-coupling reactions. [作者：Kwong, Fuk Yee;Chan, Albert S. C.;,期刊：SYNLETT, 页码：1440-1448 , 文章类型： 综述，,卷期：2008年-10] A review describes the concepts of and recent developments on monophosphine P,O-type ligands. The attractive synthetic pathways to these ligands are highlighted, and the applications of the ligands in cross-coupling rea... A highly efficient synthesis route for the rapid generation of 1,2,5,6-tetrasubstituted benzimidazoles. [作者：Duschmale, Jorg J.;Woltering, Thomas J.;Bleicher, Konrad H.;,期刊：SYNLETT, 页码：1467-1470 , 文章类型： 研究论文，,卷期：2008年-10] Herein we describe the facile generation of novel benzimidazoles starting from 5-chloro-4-iodo-2-nitroaniline. A synthesis protocol was established which allows the parallel synthesis of compd. arrays as well as the rap... A convenient one-pot synthesis of 7-trifluoromethyl-substituted imidazo[4,5-b]pyridines. [作者：Wesch, Thomas;Iaroshenko, Viktor O.;Groth, Ulrich;,期刊：SYNLETT, 页码：1459-1462 , 文章类型： 研究论文，,卷期：2008年-10] This communication describes a practical and facile one-pot approach for the synthesis of 7-trifluoromethyl-substituted imidazo[4,5-b]pyridines by the reaction of in situ generated 5-aminoimidazole and a 1,3-CCC bis-elec... Rh-catalyzed aqueous Pauson-Khand-type cycloaddition in microwave-irradiated medium. [作者：Lee, Hang Wai;Kwong, Fuk Yee;Chan, Albert S. C.;,期刊：SYNLETT, 页码：1553-1556 , 文章类型： 研究论文，,卷期：2008年-10] Microwave-assisted Rh-catalyzed dual catalysis in aq. medium is described. This tandem process transforms the enyne to the corresponding cycloadduct by cascade decarbonylation of a formate ester and subsequent carbonyla... Synthesis of new cyclopropanated tryptamine analogues. [作者：Szalata, Claude;Sapi, Janos;Szymoniak, Jan;Bertus, Philippe;Gerard, Stephane;,期刊：SYNLETT, 页码：1479-1482 , 文章类型： 研究论文，,卷期：2008年-10] A series of tryptamine analogs bearing a cyclopropylamine unit was prepd., starting from 3-indolyl acetonitriles, through a MeTi(Oi-Pr)3-mediated cyclopropanation. Friedel-Crafts alkylation of nitrogen heterocycles using [Bmim][OTf] as a catalyst and reaction medium. [作者：Kantam, M. Lakshmi;Chakravarti, Rajashree;Sreedhar, B.;Bhargava, Suresh;,期刊：SYNLETT, 页码：1449-1454 , 文章类型： 研究论文，,卷期：2008年-10] Friedel-Crafts alkylation of nitrogen heterocycles, such as indoles and pyrroles, can be carried out in ionic liqs. under mild conditions to afford the corresponding alkylated product in moderate to good yields. N-Substituted tetronamides as ambident nucleophilic building blocks for the synthesis of new 4-aza-2,3-didehydropodophyllotoxins. [作者：Madec, David;Mingoia, Francesco;Prestat, Guillaume;Poli, Giovanni;,期刊：SYNLETT, 页码：1475-1478 , 文章类型： 研究论文，,卷期：2008年-10] Aza analogs of podophyllotoxin were synthesized in 2 steps from N-substituted tetronamides. The acid-mediated benzhydrylation of N-substituted tetronamides with a suitably functionalized benzhydrol quant. afforded the c... Formal total synthesis of benzylpedamide: the right half of (+)-pederin. [作者：Liu, Degang;Xue, Jijun;Xie, Zhixiang;Wei, Liping;Zhang, Xianshu;Li, Ying;,期刊：SYNLETT, 页码：1526-1528 , 文章类型： 研究论文，,卷期：2008年-10] (Biomolecules and Their Synthetic Analogs) Section The right half (I) of (+)-pederin was synthesized through a convenient and efficient asym. synthesis in 14 steps with 8.3% overall yield. The key step was an iodine-ind... A facile one-pot synthesis of a-halo-a-allyl-aldehydes from a,a-dihaloketones using allylsamarium bromide and DMF. [作者：Di, Jucai;Zhang, Songlin;,期刊：SYNLETT, 页码：1491-1494 , 文章类型： 研究论文，,卷期：2008年-10] A convenient, one-pot synthesis of a range of a-halo a-allyl aldehydes is described. The protocol involves the reaction of allylsamarium bromide with various a,a-dihalo ketones. A possible mechanism of the transformati...