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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55条记录   Trimethylaluminum-Triflimide Complexes for the Catalysis of Highly Hindered Diels-Alder Reactions [作者：JUNG MICHAEL E; GUZAEV MIKHAIL,期刊：Organic Letters, 页码：5169-5171 , 文章类型： Article，,卷期：2012年14-20] Two catalysts, Me2AlNTf2 and MeAl(NTf2)(2), derived from the mixing of trimethylaluminum with triflimide, proved to be highly effective catalysts in hindered Diels-Alder reactions, generating the desired Diels-Alder cycl... Facile Synthesis of Dispirooxindole-Fused Heterocycles via Domino 1,4-Dipolar Addition and Diels-Alder Reaction of in Situ Generated Huisgen 1,4-Dipoles [作者：SUN JING; SUN YAN; GONG HUI; XIE YAJING; YAN CHAOGUO,期刊：Organic Letters, 页码：5172-5175 , 文章类型： Article，,卷期：2012年14-20] A facile synthetic protocol was developed for the efficient synthesis of complex dispirooxindole-fused heterocycles via a three-component reaction. The key strategies involve a domino 1,4-dipolar addition and Diels-Alder... 2-Pyrenyl-DNA: Synthesis, Pairing, and Fluorescence Properties [作者：WOJCIECHOWSKI FILIP; LIETARD JORY; LEUMANN CHRISTIAN J,期刊：Organic Letters, 页码：5176-5179 , 文章类型： Article，,卷期：2012年14-20] Multiple 2-pyrenyl-C-nucleosides were incorporated into the center of a DNA duplex resulting in stable pyrene self-recognition and excimer formation. This helical pyrene array may find use in DNA-mediated charge transfer... Preparation and Rearrangement of N-Vinyl Nitrones: Synthesis of Spiroisoxazolines and Fluorene-Tethered Isoxazoles [作者：MO DONGLIANG; WINK DONALD A; ANDERSON LAURA L,期刊：Organic Letters, 页码：5180-5183 , 文章类型： Article，,卷期：2012年14-20] N-Vinyl nitrones derived from fluorenone have been prepared via a copper-mediated coupling between fluorenone oxime and vinyl boronic acids. These compounds undergo subsequent rearrangement and addition reactions that ar... Palladium-Catalyzed Regioselective [3+2] Annulation of Internal Alkynes and Iodo-pyranoquinolines with Concomitant Ring Opening [作者：AGGARWAL TRAPTI; JHA RAJEEV R; TIWARI RAKESH K; KUMAR SONU; KOTLA SIVA K REDDY; KUMAR SUSHIL; VERMA AKHILESH K,期刊：Organic Letters, 页码：5184-5187 , 文章类型： Article，,卷期：2012年14-20] A regioselective tandem synthesis of highly functionalized pyrrolo[1,2-a]quinolines has been developed through a novel strategy by palladium-catalyzed [3 + 2] annulation of iodo-pyranoquinolines and internal alkynes with... A Neutral Naphthalene Diimide [2]Rotaxane [作者：DE ROUVILLE HENRIPIERRE JACQUOT; IEHL JULIEN; BRUNS CARSON J; MCGRIER PSARAS L; FRASCONI MARCO; SARJEANT AMY A; STODDART J FRASER,期刊：Organic Letters, 页码：5188-5191 , 文章类型： Article，,卷期：2012年14-20] A neutral donor-acceptor [2]rotaxane, which has been synthesized using click chemistry, has had its solid-state structure and superstructure elucidated by X-ray crystallography. Both dynamic H-1 NMR spectroscopy and elec... Asymmetric Total Synthesis of Apratoxin D [作者：ROBERTSON BRADLEY D; WENGRYNIUK SARAH E; COLTART DON M,期刊：Organic Letters, 页码：5192-5195 , 文章类型： Article，,卷期：2012年14-20] The first asymmetric total synthesis of the marine natural product apratoxin D, a highly potent inhibitor of H-460 human lung cancer cell growth (IC50 value of 2.6 nM), is described. Asymmetric N-amino cyclic carbamate (... [5C+1N] Annulations: Two Novel Routes to Substituted Dihydrofuro[3,2-c]pyridines [作者：HUANG PENG; ZHANG RUI; LIANG YONGJIU; DONG DEWEN,期刊：Organic Letters, 页码：5196-5199 , 文章类型： Article，,卷期：2012年14-20] Two novel routes based on [5C + 1N] annulations for the synthesis of 2,3-dihydrofuro[3,2-c]pyridines are described. Ammonium acetate (NH4OAc) is used as an ammonia source in both routes. The first route utilizes 1-acyl-1... A Fragment-Based Approach toward Substituted Trioxa[7]helicenes [作者：KELGTERMANS HANS; DOBRZANSKA LIANA; VAN MEERVELT LUC; DEHAEN WIM,期刊：Organic Letters, 页码：5200-5203 , 文章类型： Article，,卷期：2012年14-20] A series of novel substituted trioxa[7]helicenes have been successfully prepared by a one-pot palladium catalyzed C-H arylation reaction starting from readily prepared dibenzofuran fragments. The dinitro-substituted heli... Diastereoselective Multicomponent Reaction in Water: Synthesis of 2-Azapyrrolizidine Alkaloid Analogues [作者：RAJARATHINAM BALAKRISHNAN; VASUKI GNANASAMBANDAM,期刊：Organic Letters, 页码：5204-5206 , 文章类型： Article，,卷期：2012年14-20] Synthesis of the 2-aza analogues of the pyrrolizidine alkaloid motif with two contiguous stereocenters has been achieved with high regio-, chemo-, and diastereoselectivity by an innovative multicomponent reaction in wate... Synthesis of Bacillithiol and the Catalytic Selectivity of FosB-Type Fosfomycin Resistance Proteins [作者：LAMERS ALEXANDER P; KEITHLY MARY E; KIM KWANGHO; COOK PAUL D; STEC DONALD F; HINES KELLY M; SULIKOWSKI GARY A; ARMSTRONG RICHARD N,期刊：Organic Letters, 页码：5207-5209 , 文章类型： Article，,卷期：2012年14-20] Bacillithiol (BSH) has been prepared on the gram scale from the inexpensive starting material, D-glucosamine hydrochloride, in 11 steps and 8-9% overall yield. The BSH was used to survey the substrate and metal-ion selec... Three-Component Domino Reactions for Selective Formation of Indeno[1,2-b]indole Derivatives [作者：JIANG BO; LI QIUYUN; TU SHUJIANG; LI GUIGEN,期刊：Organic Letters, 页码：5210-5213 , 文章类型： Article，,卷期：2012年14-20] Efficient three-component domino strategies for the synthesis of multifunctionalized tetracyclic indeno[1,2-b]indole derivatives with different substituted patterns have been established successfully. The first pathway i... Copper-Catalyzed Amination of Silyl Ketene Acetals with N-Chloroamines [作者：MIURA TOMOYA; MORIMOTO MASAO; MURAKAMI MASAHIRO,期刊：Organic Letters, 页码：5214-5217 , 文章类型： Article，,卷期：2012年14-20] A copper(I)/2,2'-bipyridyl complex catalyzes an amination reaction of silyl ketene acetals with N-chloroamines, presenting a new preparative method of alpha-amino esters. Acid-Mediated Prevention of Aspartimide Formation in Solid Phase Peptide Synthesis [作者：MICHELS TILLMANN; DOELLING RUDOLF; HABERKORN UWE; MIER WALTER,期刊：Organic Letters, 页码：5218-5221 , 文章类型： Article，,卷期：2012年14-20] Aspartimide formation is one of the major obstacles that impedes the solid phase synthesis of large peptides and proteins. Until now, no cost-effective strategy to suppress this side reaction has been developed. Here it ... Protein Engineering of Saccharomyces cerevisiae Oxidosqualene-Lanosterol Cyclase into Parkeol Synthase [作者：LIU YUANTING; HU TAINCHANG; CHANG CHENGHSIANG; SHIE WENSHIANG; WU TUNGKUNG,期刊：Organic Letters, 页码：5222-5225 , 文章类型： Article，,卷期：2012年14-20] A Saccharomyces cerevisiae oxidosqualene-lanosterol cyclase mutant, ERG7(T384Y/Q450H/V4541), produced parkeol but not lanosterol as the sole end product. Parkeol undergoes downstream metabolism to generate compounds 9 an... Large Stokes Shift Induced by Intramolcular Charge Transfer in N,O-Chelated Naphthyridine-BF2 Complexes [作者：WU YUNYING; CHEN YONG; GOU GAOZHANG; MU WEIHUA; LV XIAOJUN; DU MEILING; FU WENFU,期刊：Organic Letters, 页码：5226-5229 , 文章类型： Article，,卷期：2012年14-20] Novel N,O-chelated naphthyridine-BF2 complexes with push-pull structures have been synthesized and characterized. Spectral investigations on these complexes reveal that photoinduced intramolecular charge transfer occurs ...