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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80条记录   Highly Enantioselective Hydroformylation of Aryl Alkenes with Diazaphospholane Ligands. [作者：Watkins, Avery L.;Hashiguchi, Brian G.;Landis, Clark R.;,期刊：Organic Letters, 页码：4553-4556 , 文章类型： 研究论文，,卷期：2008年10-20] Asym., rhodium-catalyzed hydroformylation of terminal and internal aryl alkenes with diazaphospholane ligands is reported. Under partially optimized reaction conditions, high enantioselectivity (>90% ee) and regioselect... A Chemoenzymatic Total Synthesis of the Structure Assigned to the Alkaloid (+)-Montabuphine. [作者：Matveenko, Maria;Banwell, Martin G.;Willis, Anthony C.;,期刊：Organic Letters, 页码：4693-4696 , 文章类型： 研究论文，,卷期：2008年10-20] An enantioselective synthesis of the structure I, assigned to the alkaloid (+)-montabuphine, has been achieved using the readily available metabolite II as starting material. A comparison of the phys. and spectral data ... Isolation, structure determination, and synthesis of galaxamide, a rare cytotoxic cyclic pentapeptide from a marine algae Galaxaura filamentosa. [作者：Xu, Wen-Jie;Liao, Xiao-Jian;Xu, Shi-Hai;Diao, Jian-Zhong;Du, Bin;Zhou, Xu-Long;Pan, Shan-Shan;,期刊：Organic Letters, 页码：4569-4572 , 文章类型： 研究论文，,卷期：2008年10-20] Galaxamide (I), cyclo(-N-MeLeu-Leu-N-MeLeu-Leu-Leu-), a rare cyclic pentapeptide, was isolated from G. filamentosa. A preliminary bioassay of I showed marked in vitro antiproliferative activities against GRC-1 and HepG2... Synthesis of anthracene and azaanthracene fluorophores via [2+2+2] cyclotrimerization reactions. [作者：Zou, Yan;Young, Douglas D.;Cruz-Montanez, Alejandra;Deiters, Alexander;,期刊：Organic Letters, 页码：4661-4664 , 文章类型： 研究论文，,卷期：2008年10-20] Organic Pigments, Fluorescent Brighteners, and Photographic A highly convergent [2+2+2] cyclotrimerization approach to anthracenes and 2-azaanthracenes has been developed. It allows for the facile introduction of the an... A new total synthesis of patellamide A. [作者：Garcia-Reynaga, Pablo;VanNieuwenhze, Michael S.;,期刊：Organic Letters, 页码：4621-4623 , 文章类型： 研究论文，,卷期：2008年10-20] Patellamide A, cytotoxic and antitumor lipophilic cyclic peptide isolated from marine tunicate Lissoclinum patella, was efficiently synthesized from thiazole (I) (Fmoc = 9-fluorenyl methoxy carbonyl) via two complementar... Studies on the Synthesis of Durhamycin A: Stereoselective Synthesis of a Model Aglycone. [作者：Pragani, Rajan;Roush, William R.;,期刊：Organic Letters, 页码：4613-4616 , 文章类型： 研究论文，,卷期：2008年10-20] A stereoselective synthesis of the model aglycon corresponding to the anti-HIV aureolic acids durhamycins A and B is described. Synthesis of the Tricyclic Core of Alkaloid Securinol B Using a Cascade of Vilsmeier-Haack and Mannich Cyclizations. [作者：Larouche-Gauthier, Robin;Belanger, Guillaume;,期刊：Organic Letters, 页码：4501-4504 , 文章类型： 研究论文，,卷期：2008年10-20] Iminium ions generated upon amide activation were trapped sequentially with tethered nucleophiles. This cascade of cyclizations constitutes a new synthetic strategy that was applied to the construction of the tricyclic ... Microwave-Assisted Palladium-Catalyzed Cross-Coupling of Aryl and Vinyl Halides with H-Phosphonate Diesters. [作者：Kalek, Marcin;Ziadi, Asraa;Stawinski, Jacek;,期刊：Organic Letters, 页码：4637-4640 , 文章类型： 研究论文，,卷期：2008年10-20] A general and efficient method for the microwave-assisted formation of the C-P bond was developed. Using a prevalent palladium catalyst, Pd(PPh3)4, a quant. cross-coupling of various H-phosphonate diesters with aryl and... Nickel-Catalyzed Borylative Ring-Opening Reaction of Vinylcyclopropanes with Bis(pinacolato)diboron Yielding Allylic Boronates. [作者：Sumida, Yuto;Yorimitsu, Hideki;Oshima, Koichiro;,期刊：Organic Letters, 页码：4677-4679 , 文章类型： 研究论文，,卷期：2008年10-20] Vinylcyclopropanes bearing one or two electron-withdrawing groups on the cyclopropane ring undergo nickel-catalyzed borylative ring opening with bis(pinacolato)diboron to yield allylic boronates. The reaction proceeded ... A Tandem One-Pot, Microwave-Assisted Synthesis of Regiochemically Differentiated 1,2,4,5-Tetrahydro-1,4-benzodiazepin-3-ones. [作者：De Silva, Ravindra A.;Santra, Soumava;Andreana, Peter R.;,期刊：Organic Letters, 页码：4541-4544 , 文章类型： 研究论文，,卷期：2008年10-20] A one-pot, two-step synthesis of the title compds. employs a multicomponent Ugi condensation reaction, microwave irradn., and Fe(0) as a reductant. Two pathways are accessible; both routes utilize bifunctional, o-nitro-... Enantiopure 2-Substituted Glyceraldehyde Derivatives by Aza-Claisen Rearrangement or C-Alkylation of Enamines. [作者：Bridgwood, Katy L.;Tzschucke, C. Christoph;O'Brien, Matthew;Wittrock, Sven;Goodman, Jonathan M.;Davies, John E.;Logan, Angus W. J.;Huttl, Matthias R. M.;Ley, Steven V.;,期刊：Organic Letters, 页码：4537-4540 , 文章类型： 研究论文，,卷期：2008年10-20] 2-Alkyl derivs. of butane-2,3-diacetal-protected glyceraldehyde I (R1 = Me, NCCH2, HCYCCH2, H2C:CHCH2, EtO2CCH2, PhCH2, etc.) were stereoselectively prepd. by aza-Claisen rearrangement of N-allyl-enammonium ions or C-alk... 1-Substituted 5-Aminotetrazoles: Syntheses from CNN3 with Primary Amines. [作者：Joo, Young-Hyuk;Shreeve, Jean'ne M.;,期刊：Organic Letters, 页码：4665-4667 , 文章类型： 研究论文，,卷期：2008年10-20] 1-Substituted 5-aminotetrazoles, e.g., I, were prepd. in situ by an excellent reaction of cyanogen azide and primary amines to generate an imidoyl azide as an intermediate in acetonitrile/water. After cyclization, the i... A Formal Total Synthesis of Platencin. [作者：Austin, Kerrie A. B.;Banwell, Martin G.;Willis, Anthony C.;,期刊：Organic Letters, 页码：4465-4468 , 文章类型： 研究论文，,卷期：2008年10-20] The readily available and enantiomerically pure trienes I undergo a thermally induced intramol. Diels-Alder reaction to give the corresponding mixt. of compds. II (R = OSiMe2CMe3, R1 = H; R = H, R1 = OSiMe2CMe3). This m... A Bench-Stable Pd Catalyst for the Hydroarylation of Fullerene with Boronic Acids. [作者：Mori, Susumu;Nambo, Masakazu;Chi, Liang-Chen;Bouffard, Jean;Itami, Kenichiro;,期刊：Organic Letters, 页码：4609-4612 , 文章类型： 研究论文，,卷期：2008年10-20] A Pd(II) catalyst for the hydroarylation of fullerene with boronic acids is presented. Treatment of C60 with an arylboronic acid ArB(OH)2 (Ar = Ph, 4-MeC6H4, 4-ClC6H4, 4-AcC6H4, 3-thienyl, etc.) in the presence of a cat... Zirconocene-Mediated Synthesis of Cyclobutabenzenes. [作者：Barluenga, Jose;Calleja, Jonas;Anton, Maria J.;Alvarez-Rodrigo, Lucia;Rodriguez, Felix;Fananas, Francisco J.;,期刊：Organic Letters, 页码：4469-4471 , 文章类型： 研究论文，,卷期：2008年10-20] A new, mild, one-pot method for the synthesis of cyclobutabenzenes, e.g., I, by the zirconium-promoted cross-coupling reaction of aryllithium compds. and alkenyl bromides is reported. Formation of an arynezirconocene co... Facile Preparation of a-Aryl Nitriles by Direct Cyanation of Alcohols with TMSCN Under the Catalysis of InX3. [作者：Chen, Gang;Wang, Zheng;Wu, Jiang;Ding, Kuiling;,期刊：Organic Letters, 页码：4573-4576 , 文章类型： 研究论文，,卷期：2008年10-20] 23 A convenient and efficient synthesis of a-aryl nitriles, e.g., I, was developed by direct cyanation of alcs. with TMSCN under the catalysis of Lewis acid. Using 5-10 mol % of InBr3 as the catalyst, a variety of benzy...