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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   Synthesis of novel 3-oxopiperidin-2-ones from methyl 2-alkoxy-5-amino-2-pentenoates. [作者：Dejaegher, Yves;D'Hooghe, Matthias;De Kimpe, Norbert;,期刊：SYNLETT, 页码：1961-1964 , 文章类型： 研究论文，,卷期：2008年-13] Alkylamino-substituted 2-alkoxy-2-pentenoates, obtained through ring transformation of 4-(1-chloro-1-methylethyl)- or 4-(2-halo-1,1-dimethylethyl)azetidin-2-ones upon treatment with NaOMe in MeOH, were evaluated as subst... Straightforward and efficient synthesis of (4R,6S)-4-(tert-butyldimethylsiloxy)-6-(hydroxymethyl)tetrahydropyran-2- one. [作者：Casar, Zdenko;,期刊：SYNLETT, 页码：2036-2040 , 文章类型： 研究论文，,卷期：2008年-13] A novel synthetic approach to (4R,6S)-4-(tert-butyldimethylsiloxy)-6-(hydroxymethyl)tetrahydropyran-2- one, a key precursor of the statin side chain, is described. A prime feature of the presented strategy is the transf... Use of pyridinium chlorochromate and reusable polyaniline salt catalyst combination for the oxidation of indoles. [作者：Kumar, Chebolu Naga Sesha Sai Pavan;Devi, Chebrolu Lavanya;Rao, Vaidya Jayathirtha;Palaniappan, Srinivasan;,期刊：SYNLETT, 页码：2023-2027 , 文章类型： 研究论文，,卷期：2008年-13] A novel method was described herein for the simple, convenient and efficient oxidn. of indoles to isatins using pyridinium chlorochromate with the aid of polyaniline salt catalyst at room temp. or at reflux in dichloroet... Baylis-Hillman reaction of cyclic enones with arenecarbaldehydes and N-arylidene-4-methylbenzenesulfonamides by using NAP-MgO. [作者：Kantam, M. Lakshmi;Chakrapani, L.;Choudary, B. M.;,期刊：SYNLETT, 页码：1946-1948 , 文章类型： 研究论文，,卷期：2008年-13] Baylis-Hillman reaction of cyclic enones with arenecarbaldehydes and N-arylidene-4-methylbenzenesulfonamides under mild conditions by using nanocryst. MgO (NAP-MgO) afforded the Baylis-Hillman adducts in moderate to good... FeCl3-catalyzed intramolecular hydroarylation of alkynes. [作者：Dal Zotto, Christophe;Wehbe, Johny;Virieux, David;Campagne, Jean-Marc;,期刊：SYNLETT, 页码：2033-2035 , 文章类型： 研究论文，,卷期：2008年-13] The intramol. hydroarylation of alkynes using a substoichiometric amt. of FeCl3 was described. When starting from tetrasubstituted elimination were isolated in good yields. FeCl3/TMSCl. An effective catalytic system for the conjugate addition of sodium p-toluenesulfinate to a,b-enones. [作者：Sreedhar, B.;Reddy, M. Amarnath;Reddy, P. Surendra;,期刊：SYNLETT, 页码：1949-1952 , 文章类型： 研究论文，,卷期：2008年-13] A new protocol for the b-sulfonation of a,b-unsatd. carbonyl compds. was described. The method employs FeCl3 as catalyst and TMSCl as additive for conjugate addn. of sodium p-toluenesulfinate to enones. Microwave-assisted cleavage of aryl methyl ethers with lithium thioethoxide (LiSEt). [作者：Cvengros, Jan;Neufeind, Stefan;Becker, Anne;Schmalz, Hans-Guenther;,期刊：SYNLETT, 页码：1993-1998 , 文章类型： 研究论文，,卷期：2008年-13] LiSEt, a white solid easily prepd. from EtSH and BuLi in hexane, was identified as a highly efficient reagent for the cleavage (O-demethylation) of aryl Me ethers, i.e. methyl-protected phenols. Of particular synthetic ... Selective O-deallylation of ortho-allyloxyanisoles. [作者：Sanz, Roberto;Martinez, Alberto;Marcos, Cesar;Fananas, Francisco J.;,期刊：SYNLETT, 页码：1957-1960 , 文章类型： 研究论文，,卷期：2008年-13] 2-Allyloxyanisoles are selectively and easily deallylated by treatment with sec- or tert-butyllithium at low temp. The reaction is proposed to proceed through a tandem intermol. carbolithiation-b-elimination process, wh... Stereospecific synthesis of eight-membered polyhydroxy carbocycles via TIBAL-promoted Claisen rearrangement. [作者：Han, Tianxiang;Liu, Yi;Yang, Zhenjun;Zhang, Liangren;Zhang, Lihe;,期刊：SYNLETT, 页码：1985-1988 , 文章类型： 研究论文，,卷期：2008年-13] The stereoselective synthesis of novel eight-membered polyhydroxy carbocycles, i.e. I, was achieved from D-glucose via mercuriocyclization and triisobutylaluminum (TIBAL)-promoted Claisen rearrangement. Along with rearra... The synthesis of N-TBS-S-alkynyl sulfoximines. [作者：Harmata, Michael;Huang, Chaofeng;Chen, Yugang;Zheng, Pinguan;Gao, Xuefeng;Ying, Weijiang;,期刊：SYNLETT, 页码：2051-2055 , 文章类型： 研究论文，,卷期：2008年-13] Treatment of b-keto sulfoximines PhS(O)(:NSiMe2CMe3)CH2COR (R = Me, Et, Me2CH, Ph, 2-ClC6H4, 2-furyl, etc.) with triflic anhydride and Hunig's base in toluene resulted in the formation of S-alkynyl sulfoximines PhS(O)(:N... Mild debenzylation of aryl benzyl ether with BCl3 in the presence of pentamethylbenzene as a non-Lewis-basic cation scavenger. [作者：Okano, Kentaro;Okuyama, Kei-ichiro;Fukuyama, Tohru;Tokuyama, Hidetoshi;,期刊：SYNLETT, 页码：1977-1980 , 文章类型： 研究论文，,卷期：2008年-13] Scope and limitations of the debenzylation conditions for aryl benzyl ether, which was developed during our synthetic studies on yatakemycin, were investigated. The chemoselective debenzylation proceeds at low temp. wit... The development of asymmetric primary amine catalysts based on cinchona alkaloids. [作者：Chen, Ying-Chun;,期刊：SYNLETT, 页码：1919-1930 , 文章类型： 综述，,卷期：2008年-13] A review. Primary amines derived from natural cinchona alkaloids are demonstrated to be excellent catalysts for a no. of asym. reactions of carbonyl compds. In comparison with chiral secondary amines, these primary ami... Efficient glycosylation using ODS adsorption method based on the affinity of long alkoxybenzyl glycoside. [作者：Imagawa, Hiroshi;Kinoshita, Atsushi;Yamamoto, Hirofumi;Namba, Kosuke;Nishizawa, Mugio;,期刊：SYNLETT, 页码：1981-1984 , 文章类型： 研究论文，,卷期：2008年-13] Para-Oleyloxybenzyl (POB) glycoside, selectively removable with TMSOTf, was developed as a protecting group for the glycosyl acceptor. Activation of the trichloroacetimidate was efficiently accomplished using 20 mol% of... CuI-catalyzed cross-coupling reaction of (E)-vinyl bromides with nitrogen-containing heterocycles. [作者：Mao, Jincheng;Hua, Qiongqiong;Guo, Jun;Shi, Daqing;Ji, Shunjun;,期刊：SYNLETT, 页码：2011-2016 , 文章类型： 研究论文，,卷期：2008年-13] An efficient and straightforward copper-catalyzed method allowing vinylation of N-nucleophiles with various substituted (E)-vinyl bromides under palladium-free and ligand-free conditions results in high yields (up to 95%... 1,3-Dipolar cycloaddition of difluoro(methylene)cyclopropanes with nitrones: efficient synthesis of 3,3-difluorinated tetrahydropyridinols. [作者：Hang, Xiao-Chun;Chen, Qing-Yun;Xiao, Ji-Chang;,期刊：SYNLETT, 页码：1989-1992 , 文章类型： 研究论文，,卷期：2008年-13] Difluoro-substituted spirocyclopropaneisoxazolidines, e.g., I, were formed by 1,3-dipolar cycloaddn. of difluoro(methylene)cyclopropanes (F2MCPs) with nitrones in high yields. The [3+2]-cycloaddn. reactions exhibited go... Photochemistry of nitrogen-bridged cyclophanes: 2,11-diaza[32]anthracenoparacyclophane and 2,11-diaza[32]paracyclophane systems. [作者：Okamoto, Hideki;Yamaji, Minoru;Satake, Kyosuke;,期刊：SYNLETT, 页码：1931-1945 , 文章类型： 综述，,卷期：2008年-13] A review. This account provides an overview of the photochem. properties of cyclophanes possessing nitrogen atoms in the bridge chains, namely 2,11-diaza[32]anthracenoparacyclophane and 2,11-diaza[32]paracyclophane syst...