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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   The influence of fluoroalkyl-group electronegativity on stereocontrol in the synthesis of Y[CH(RF)NH]Gly peptides. [作者：Bigotti, Serena;Volonterio, Alessandro;Zanda, Matteo;,期刊：SYNLETT, 页码：958-962 , 文章类型： 研究论文，,卷期：2008年-7] New peptidomimetics featuring CH(RF)NH units, having different degrees of fluorination, as peptide-bond surrogates were synthesized. The key step in the synthesis consists of a stereoselective aza-Michael addn. of chiral... Ferrier glycosylation reaction catalyzed by Bi(OTf)3-montmorillonite K-10: efficient synthesis of 3,4-unsaturated sialic acid derivatives. [作者：Ikeda, Kiyoshi;Ueno, Yayoi;Kitani, Satoru;Nishino, Reiko;Sato, Masayuki;,期刊：SYNLETT, 页码：1027-1030 , 文章类型： 研究论文，,卷期：2008年-7] The reaction of the 4,5-oxazoline deriv. of sialic acid with various alcs. was effectively promoted by a catalytic amt. of montmorillonite K-10 clay-supported Bi(OTf)3 to produce a variety of 3,4-unsatd. sialic acids via... Novel synthesis of nine-membered oxa-heterocycles by Pd(0)-catalyzed intramolecular Heck reaction via unusual 9-endo-trig-mode cyclization. [作者：Majumdar, K. C.;Chattopadhyay, B.;,期刊：SYNLETT, 页码：979-982 , 文章类型： 研究论文，,卷期：2008年-7] Syntheses of nine-membered oxa-heterocyclic compds. by the application of the intramol. Heck reaction were difficult to develop. Herein, we describe the synthesis of this class of compds. through 9- and 8-endo-trig cycli... Selective b-hydroxyethylation at the N-1 position of a pyrazolone. [作者：Synthesis of benzyl 1-(b-hydroxyethyl)-5-methyl-3-oxo-2-phenyl-2,3-dihydro-1H-pyrazole-4-c;,期刊：SYNLETT, 页码：1005-1008 , 文章类型： 研究论文，,卷期：2008年-7] Selective 2-hydroxyethylation at the N-1 position of benzyl 5-methyl-3-oxo-2-phenyl-2,3-dihydro-1H-pyrazole-4-carboxylate with epoxides was achieved using either AlMe3 or Mg(ClO4)2 under mild conditions. The epoxide rin... Intramolecular palladium-catalyzed oxidative coupling on thiophene and furan rings. Determinant role of the electronic availability of the heterocycle. [作者：Beccalli, Egle M.;Borsini, Elena;Broggini, Gianluigi;Rigamonti, Micol;Sottocornola, Silvia;,期刊：SYNLETT, 页码：1053-1057 , 文章类型： 研究论文，,卷期：2008年-7] The cyclization of N-allyl-N-carbethoxy-substituted aminothiophenes and furans was performed by intramol. Pd(II)-catalyzed oxidative coupling. The process involves a nucleophilic attack of a heteroarom. carbon to the in... Novel use of N-carboalkoxy a,b-unsaturated iminium ions as dienophiles in Diels-Alder reactions. [作者：O'Connor, Patrick D.;Korber, Karsten;Brimble, Margaret A.;,期刊：SYNLETT, 页码：1036-1038 , 文章类型： 研究论文，,卷期：2008年-7] Tricyclic spiro-N,O-acetals were assembled in a single step by cycloaddn. of hydroxymethyl dienes to iminium ion-activated dienophiles that were generated by acidolysis of a,b-unsatd. N-carboalkoxy N,O-acetals or b-metho... Regioselective synthesis of functionalized resorcins by cyclization of 1,3-bis(trimethylsilyloxy)-1,3-butadienes with 3,3-dimethoxypentanoyl chloride. [作者：Sher, Muhammad;Langer, Peter;,期刊：SYNLETT, 页码：1050-1052 , 文章类型： 研究论文，,卷期：2008年-7] 26 Functionalized resorcins are regioselectively prepd. by cyclization of 1,3-bis(trimethylsilyloxy)-1,3-butadienes with 3,3-dimethoxypentanoyl chloride. The regioselectivity is controlled by the type of Lewis acid empl... Modular and stereoselective synthesis of hydroxylated angularly fused tricyclic piperidine derivatives via samarium diiodide mediated cyclization. [作者：Kumaran, Rajendran Senthil;Bruedgam, Irene;Reissig, Hans-Ulrich;,期刊：SYNLETT, 页码：991-994 , 文章类型： 研究论文，,卷期：2008年-7] Proline-promoted Mannich reactions of a series of cycloalkanones with formalin and aniline followed by N-acetylation provided precursors I (n = 1-4) for SmI2-mediated cyclizations. The ketyl-aryl coupling of these compd... Microwave-assisted one-pot synthesis of dihydrocoumarins from phenols and cinnamoyl chloride. [作者：Zhang, Zhen;Ma, Yuan;Zhao, Yufen;,期刊：SYNLETT, 页码：1091-1095 , 文章类型： 研究论文，,卷期：2008年-7] A facile approach was developed for the synthesis of dihydrocoumarin derivs. through the reaction of phenols and cinnamoyl chloride in the presence of ecofriendly solid-acid catalyst montmorillonite K-10 via a tandem est... Organocatalyzed asymmetric inverse-electron-demand hetero-Diels-Alder reaction of a,b-unsaturated trifluoromethyl ketones and aldehydes. [作者：Zhao, Yan;Wang, Xiao-Jin;Liu, Jin-Tao;,期刊：SYNLETT, 页码：1017-1020 , 文章类型： 研究论文，,卷期：2008年-7] The inverse-electron-demand hetero-Diels-Alder reaction of aldehydes and a,b-unsatd. trifluoromethyl ketones occurred under mild conditions using a chiral diphenylprolinol silyl ether as the catalyst. After subsequent c... Iron(III) chloride catalyzed Nazarov cyclization of 3-substituted thiophene derivatives. [作者：Kawatsura, Motoi;Higuchi, Yuji;Hayase, Shuichi;Nanjo, Masato;Itoh, Toshiyuki;,期刊：SYNLETT, 页码：1009-1012 , 文章类型： 研究论文，,卷期：2008年-7] The Nazarov cyclization of silicon-free 3-substituted thiophene derivs. was effectively catalyzed by 10 mol% FeCl3, which provided the desired cyclized trans product in good yield. Synthesis of functionalized biaryls based on a Heck cross-coupling-[3+3] cyclization strategy. [作者：Mross, Gerson;Reinke, Helmut;Langer, Peter;,期刊：SYNLETT, 页码：963-966 , 文章类型： 研究论文，,卷期：2008年-7] 6-Arylsalicylates were regioselectively prepd. by formal [3+3] cyclization of 1,3-bis(silyloxy)-1,3-butadienes with 1-aryl-3-ethoxyprop-2-en-1-ones which are available by Heck reaction of benzoyl chlorides with Et vinyl ... Multiphase oxidation of aniline to nitrosobenzene with hydrogen peroxide catalyzed by heteropoly acids. [作者：Tundo, P.;Romanelli, G. P.;Vazquez, P. G.;Loris, A.;Arico, F.;,期刊：SYNLETT, 页码：967-970 , 文章类型： 研究论文，,卷期：2008年-7] Keggin-type heteropoly acids were used as catalyst for high-yielding oxidn. reactions in multiphase conditions. This simple and efficient procedure promoted the conversion of anilines to the corresponding nitroso and ni... Tandem [2+1] cycloaddition-ring expansion of bicyclic alkenes with tertiary propargylic acetates catalyzed by palladium(II)-coordinated phosphinous acid. [作者：Bigeault, Julie;de Riggi, Innocenzo;Gimbert, Yves;Giordano, Laurent;Buono, Gerard;,期刊：SYNLETT, 页码：1071-1075 , 文章类型： 研究论文，,卷期：2008年-7] Palladium-secondary phosphine oxide complex catalyzed the tandem [2+1] cycloaddn.-ring expansion of norbornene derivs. with tertiary propargylic acetates to afford bicyclo[3.2.1]octadienes. New cationic bisoxazoline-Au(III) complex catalyzed cycloisomerization of 1-allenyl-1-ethynyl acetate. [作者：Kato, Keisuke;Kobayashi, Takuya;Fujinami, Takeo;Motodate, Satoshi;Kusakabe, Taichi;Mochida, Tomoyuki;Akita, Hiroyuki;,期刊：SYNLETT, 页码：1081-1085 , 文章类型： 研究论文，,卷期：2008年-7] Treatment of 1-allenyl-1-ethynyl acetates in the presence of a Au or Pt catalyst (5 mol%) in toluene at room temp., followed by methanolysis, gave 4-methylene-2-cyclopentenones. The new cationic bisoxazoline (box)-Au(II... A new class of chiral Lewis basic metal-free catalysts for stereoselective allylations of aldehydes. [作者：Simonini, Valentina;Benaglia, Maurizio;Pignataro, Luca;Guizzetti, Stefania;Celentano, Giuseppe;,期刊：SYNLETT, 页码：1061-1065 , 文章类型： 研究论文，,卷期：2008年-7] A new class of amine N-oxides derived from trans-2,5-diphenylpyrrolidine were synthesized in enantiomerically pure form and tested as metal-free catalysts in the reaction of aldehydes with allyltrichlorosilane to afford ...