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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72条记录   New Access to 1-Deoxynojirimycin Derivatives via Azide-Alkene Cycloaddition. [作者：Zhou, Ying;Murphy, Paul V.;,期刊：Organic Letters, 页码：3777-3780 , 文章类型： 研究论文，,卷期：2008年10-17] The synthesis of 1-deoxynojirimycin (DNJ) derivs. is described from D-glucono-d-lactone. The DNJ derivs. were obtained via a sequence that included a stereoselective intramol. Huisgen reaction, decompn. to an aziridine,... Enantioselective Synthesis of Tetrafluorinated Glucose and Galactose. [作者：Timofte, Roxana S.;Linclau, Bruno;,期刊：Organic Letters, 页码：3673-3676 , 文章类型： 研究论文，,卷期：2008年10-17] Polyfluorinated carbohydrates have emerged as interesting probes to investigate "polar hydrophobicity" effect(s) in protein-carbohydrate interactions. A convenient enantioselective synthesis of tetrafluorinated analogs ... A New pH-Switchable Dimannosyl[c2]Daisy Chain Molecular Machine. [作者：Coutrot, Frederic;Romuald, Camille;Busseron, Eric;,期刊：Organic Letters, 页码：3741-3744 , 文章类型： 研究论文，,卷期：2008年10-17] A dimeric rotaxane of the crown ether-substituted (aminoalkyl)(mannosyl)triazolium salt I稨+? PF6- is prepd. using the copper-catalyzed azide-alkyne cycloaddn. reaction followed by regioselective methylation of the triazo... Cross-Coupling Reactions of Indium Organometallics with 2,5-Dihalopyrimidines: Synthesis of Hyrtinadine A. [作者：Mosquera, Angeles;Riveiros, Ricardo;Perez Sestelo, Jose;Sarandeses, Luis A.;,期刊：Organic Letters, 页码：3745-3748 , 文章类型： 研究论文，,卷期：2008年10-17] reagents (R3In) with 5-bromo-2-chloropyrimidine proceeds chemoselectively, in good yields, to give 5-substituted-2-chloropyrimidines or 2,5-disubstituted pyrimidines using 40 or 100 mol % of R3In, resp. Sequential cross... Asymmetric Synthesis of (+)-Isofebrifugine and (-)-Sedacryptine from a Common Chiral Nonracemic Building Block. [作者：Wee, Andrew G. H.;Fan, Gao-Jun;,期刊：Organic Letters, 页码：3869-3872 , 文章类型： 研究论文，,卷期：2008年10-17] The stereoselective syntheses of 2-substituted and 2,6-disubstituted 3-hydroxypiperidine alkaloids, (+)-isofebrifugine (I) and (-)-sedacryptine (II), from a common, functionalized nonracemic bicyclic building block are a... Total Synthesis of a Marine Alkaloid from the Tunicate Dendrodoa grossularia. [作者：Hupp, Christopher D.;Tepe, Jetze J.;,期刊：Organic Letters, 页码：3737-3739 , 文章类型： 研究论文，,卷期：2008年10-17] A short synthesis of an indole marine alkaloid (I) from the tunicate Dendrodoa grossularia is described. The key step in the synthesis involves a novel twist on an underutilized oxazole rearrangement, which produces the... Expedient Total Syntheses of WIN 64745 and WIN 64821. [作者：Perez-Balado, Carlos;de Lera, Angel R.;,期刊：Organic Letters, 页码：3701-3704 , 文章类型： 研究论文，,卷期：2008年10-17] Bispyrrolidinoindoline diketopiperazine alkaloids were synthesized from a common intermediate in seven steps from com. available amino acids. This versatile synthetic strategy has led to the accomplishment of the first ... Synthesis of Electronically Diverse Tetraarylimidazolylidene Carbenes via Catalytic Aldimine Coupling. [作者：Ogle, James W.;Zhang, Jubo;Reibenspies, Joseph H.;Abboud, Khalil A.;Miller, Stephen A.;,期刊：Organic Letters, 页码：3677-3680 , 文章类型： 研究论文，,卷期：2008年10-17] A new method for synthesizing sym. N-heterocyclic imidazolium salts is described. Catalytic coupling of aldimines, ArCH:NAr' (e.g., Ar = Ph, 4-Me-, 4-F-, 4-CF3-, 4-MeOC6H4, Ar' = Ph, 4-F-, 4-Me-, 4-MeO-, 4-NO2C6H4) with... Ortho-Silylated Derivatives of Tetrakis(2-hydroxyphenyl)ethene: A Sterically Isolated Structural Model for Oxo-Surface Binding Domains. [作者：Chung, Mee-Kyung;Lightbody, Owen C.;Stryker, Jeffrey M.;,期刊：Organic Letters, 页码：3825-3828 , 文章类型： 研究论文，,卷期：2008年10-17] The introduction of sterically isolating ortho-trialkylsilyl, -aryldialkylsilyl, and -diarylalkylsilyl substituents onto the structurally preorganized tetrakis(2-hydroxyphenyl)ethene ligand framework has been accomplishe... Oxidation of 3-Alkyl-Substituted 2-Pyrazolino[60]fullerenes: A New Formyl-Containing Building Block for Fullerene Chemistry. [作者：Delgado, Juan Luis;Cardinali, Francois;Espildora, Eva;Torres, M. Rosario;Langa, Fernando;Martin, Nazario;,期刊：Organic Letters, 页码：3705-3708 , 文章类型： 研究论文，,卷期：2008年10-17] A new building block for fullerene chem., endowed with a formyl group on C-3 of the 2-pyrazoline ring, has been prepd. in a simple two-step synthesis by oxidn. of readily available 3-alkyl-substituted 2-pyrazolino[60]ful... Synthesis and Functionalization of 3,3'-Bis(spirodienone)-Bridged 2,2'-Bithiophene: A New Building Block for Redox-Active Molecular Switching Materials. [作者：Kurata, Hiroyuki;Kim, Sang;Fujimoto, Takahisa;Matsumoto, Kouzou;Kawase, Takeshi;Kubo, Takashi;,期刊：Organic Letters, 页码：3837-3840 , 文章类型： 研究论文，,卷期：2008年10-17] Bithiophene derivs. bridged with a bis(spirodienone) unit I (R = H, Br, CHO, etc.) were synthesized and characterized. Lithiation of the thiophene rings of an unsubstituted deriv. I (R = H) proceeded without decompn. of... Absolute Stereochemistry of Amphidinolide Q. [作者：Takahashi, Yohei;Kubota, Takaaki;Fukushi, Eri;Kawabata, Jun;Kobayashi, Jun'ichi;,期刊：Organic Letters, 页码：3709-3711 , 文章类型： 研究论文，,卷期：2008年10-17] The abs. configurations at five chiral centers in amphidinolide Q (I), a cytotoxic 12-membered macrolide isolated from a marine dinoflagellate Amphidinium sp., were elucidated to be 4R, 7R, 9S, 11R, and 13R on the basis ... Simultaneous directed assembly of three distinct heterodimeric coiled coils. [作者：Diss, Maria L.;Kennan, Alan J.;,期刊：Organic Letters, 页码：3797-3800 , 文章类型： 研究论文，,卷期：2008年10-17] We describe simultaneous formation of three distinct heterodimeric coiled coils from a mixt. of six different peptides. The choice among electrostatically viable complexes is governed by alignment of buried core residue... Total Synthesis of the Originally Proposed and Revised Structures of Scleritodermin A. [作者：Liu, Sheng;Cui, Yong-Mei;Nan, Fa-Jun;,期刊：Organic Letters, 页码：3765-3768 , 文章类型： 研究论文，,卷期：2008年10-17] The first total synthesis of the originally proposed and revised structures of scleritodermin A, I and II, resp., along with an isomer, were achieved by the use of an a-azido carboxyl group serving as the key a-ketoamide... 2D Layered Supramolecular Host System Derived from a 21-Helical Column, Composed of 1,2-Diphenylethylenediamine and N-Phenyliminodiacetic Acid. [作者：Imai, Yoshitane;Murata, Katuzo;Sato, Tomohiro;Kuroda, Reiko;Matsubara, Yoshio;,期刊：Organic Letters, 页码：3821-3824 , 文章类型： 研究论文，,卷期：2008年10-17] developed by combining 1,2-diphenylethylenediamine and N-phenyliminodiacetic acid. This 2D layered structure was formed by a hydrogen- and ionic-bonded network between 21-helical columns. Chemodosimetric Hg2+-Selective Signaling by Mercuration of Dichlorofluorescein Derivatives. [作者：Choi, Myung Gil;Ryu, De Hun;Jeon, Hye Lim;Cha, Sunyoung;Cho, Janggeun;Joo, Hyun Hye;Hong, Kwan Soo;Lee, Chulhyun;Ahn, Sangdoo;Chang, Suk-Kyu;,期刊：Organic Letters, 页码：3717-3720 , 文章类型： 研究论文，,卷期：2008年10-17] The chemodosimetric behavior of dichlorofluorescein derivs. toward Hg2+ ions was studied. Simple chemodosimetric systems showed selective and efficient signaling behaviors toward micromolar concns. of Hg2+ ions over oth...