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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   N-(p-Dodecylphenylsulfonyl)-2-pyrrolidinecarboxamide: A Practical Proline Mimetic for Facilitating Enantioselective Aldol Reactions. [作者：Yang, Hua;Carter, Rich G.;,期刊：Organic Letters, 页码：4649-4652 , 文章类型： 研究论文，,卷期：2008年10-20] A highly practical and readily available proline surrogate has been developed with improved soly. properties in common, nonpolar org. solvents. This sulfonamide-based catalyst has proven highly effective at facilitating... Total Synthesis of Amphidinolide J. [作者：Barbazanges, Marion;Meyer, Christophe;Cossy, Janine;,期刊：Organic Letters, 页码：4489-4492 , 文章类型： 研究论文，,卷期：2008年10-20] The marine natural product amphidinolide J (I) has been synthesized according to a convergent strategy. The key steps of this synthesis include a B-alkyl Suzuki-Miyaura coupling and the addn. of an alkynyllithium reagen... Synthesis of the Reported Structure of the Bisbenzoquinone Lanciaquinone, Isolated from Maesa lanceolata. [作者：Guillonneau, Loic;Taddei, David;Moody, Christopher J.;,期刊：Organic Letters, 页码：4505-4508 , 文章类型： 研究论文，,卷期：2008年10-20] Lanciaquinone, isolated from Maesa lanceolata, was originally assigned as a bisbenzoquinone with a C14-chain linking the two quinone rings. A synthesis of the reported structure I, in which the key step is a double Clai... Synthesis and Guest Recognition Ability of 2,3-Dimethoxy-1,4-phenylene-Containing Porphyrinoids. [作者：Ikeda, Chusaku;Sakamoto, Naoya;Nabeshima, Tatsuya;,期刊：Organic Letters, 页码：4601-4604 , 文章类型： 研究论文，,卷期：2008年10-20] (Biomolecules and Their Synthetic Analogs) Section The acid-catalyzed condensation of the bispyrrolylbenzene deriv. 2,3-(MeO)2-C6H2-1,4-R (R = 2-pyrrolyl) and benzaldehyde yielded macrocycle I with three dipyrrin subunit... Synthesis of the C1-C12 Fragment of Iriomoteolide 1a by Sequential Catalytic Asymmetric Vinylogous Aldol Reactions. [作者：Fang, Lijing;Xue, Haoran;Yang, Jiong;,期刊：Organic Letters, 页码：4645-4648 , 文章类型： 研究论文，,卷期：2008年10-20] An efficient synthesis of the C1-C12 fragment I of iriomoteolide 1a has been accomplished via sequential application of two catalytic, asym., vinylogous aldol reactions: a catalytic vinylogous aldol reaction was used to ... High Temperature Metalation of Functionalized Aromatics and Heteroaromatics using (tmp)2Zn?MgCl2?LiCl and Microwave Irradiation. [作者：Wunderlich, Stefan;Knochel, Paul;,期刊：Organic Letters, 页码：4705-4707 , 文章类型： 研究论文，,卷期：2008年10-20] 27 A wide range of polyfunctional aryl and heteroaryl zinc reagents were efficiently prepd. in THF via direct zincation using (tmp)2Zn?MgCl2?LiCl and microwave irradn. Ester and cyano functions as well as ketones are co... A New Series of Dendrimers Containing Two Ferrocenyl Units and a Frechet Dendron around a Triazine Nucleus. [作者：Xu, Dongmei;Wang, Wei;Gesua, Daniel;Kaifer, Angel E.;,期刊：Organic Letters, 页码：4517-4520 , 文章类型： 研究论文，,卷期：2008年10-20] The prepn. and characterization of a new series of dendrimers contg. two identical aminoferrocenyl units and a Frechet dendron around a triazine nucleus is described. A sizable degree of electronic communication between... Asymmetric, Organocatalytic, Three-Step Synthesis of g-Hydroxy-(E)-a,b-Unsaturated Sulfones and Esters. [作者：Petersen, Kimberly S.;Posner, Gary H.;,期刊：Organic Letters, 页码：4685-4687 , 文章类型： 研究论文，,卷期：2008年10-20] Efficient and enantiocontrolled synthesis of g-hydroxy-a,b-unsatd. sulfones and esters are reported through the reaction of enantioenriched a-selenyl aldehydes with EWG-stabilized carbanions and then a one-pot selenide o... Novel fluorescent dyes with fused perylene tetracarboxylic diimide and BODIPY analogue structures. [作者：Feng, Junqian;Liang, Baolong;Wang, Delou;Xue, Lin;Li, Xiyou;,期刊：Organic Letters, 页码：4437-4440 , 文章类型： 研究论文，,卷期：2008年10-20] Organic Pigments, Fluorescent Brighteners, and Photographic Two novel red fluorescent dyes based on perylene tetracarboxylic diimides and BODIPY were designed and synthesized. Significant features, such as longer wavele... Total Synthesis of Ciliatamides A-C: Stereochemical Revision and the Natural Product-Guided Synthesis of Unnatural Analogs. [作者：Lewis, Jana A.;Daniels, R. Nathan;Lindsley, Craig W.;,期刊：Organic Letters, 页码：4545-4548 , 文章类型： 研究论文，,卷期：2008年10-20] The first total synthesis of ciliatamides A-C was completed, leading to enantiomers. Due to the expedited route, a library of over 50 unnatural ciliatamide analogs was also prepd. A formal enantioselective acetate Mannich reaction: The nitro functional group as a traceless agent for activation and enantiocontrol in the synthesis of b-amino acids. [作者：Shen, Bo;Johnston, Jeffrey N.;,期刊：Organic Letters, 页码：4397-4400 , 文章类型： 研究论文，,卷期：2008年10-20] A two-step procedure involving the enantioselective addn. of a-nitro esters to imines, followed by reductive denitration, provides a convenient new enantioselective synthesis of b-amino acids. Specifically, b-Ph alanine ... Stereospecific Total Synthesis of Somocystinamide A. [作者：Suyama, Takashi L.;Gerwick, William H.;,期刊：Organic Letters, 页码：4449-4452 , 文章类型： 研究论文，,卷期：2008年10-20] The first total synthesis of somocystinamide A, a disulfide dimer with extremely labile enamide functional groups, was accomplished in a concise and stereospecific manner. Somocystinamide A is reported to possess except... General Synthesis of C-Glycosyl Amino Acids via Proline-Catalyzed Direct Electrophilic a-Amination of C-Glycosylalkyl Aldehydes. [作者：Nuzzi, Andrea;Massi, Alessandro;Dondoni, Alessandro;,期刊：Organic Letters, 页码：4485-4488 , 文章类型： 研究论文，,卷期：2008年10-20] Non-natural axially and equatorially linked C-glycosyl a-amino acids (glycines, alanines, and CH2-serine isosteres) with either S or R a-amination of C-glycosylalkyl aldehydes using dibenzyl azodicarboxylate as the elect... Photogeneration of 2-Deoxyribonolactone in Benzophenone-Purine Dyads. Formation of Ketyl-C1' Biradicals. [作者：Paris, Cecilia;Encinas, Susana;Belmadoui, Nourreddine;Climent, Maria J.;Miranda, Miguel Angel;,期刊：Organic Letters, 页码：4409-4412 , 文章类型： 研究论文，,卷期：2008年10-20] 2-deoxyribonolactone deriv. II. Laser flash photolysis reveals that the process occurs from the short-lived benzophenone-like triplet excited state. A mechanism involving intramol. electron transfer with the purine bas... Enantioselective Syntheses of Carbanucleosides from the Pauson-Khand Adduct of Trimethylsilylacetylene and Norbornadiene. [作者：Vazquez-Romero, Ana;Rodriguez, Julia;Lledo, Agusti;Verdaguer, Xavier;Riera, Antoni;,期刊：Organic Letters, 页码：4509-4512 , 文章类型： 研究论文，,卷期：2008年10-20] A new enantioselective approach to carbanucleosides from Pauson-Khand (PK) adduct I is disclosed. The chiral cyclopentenone I is readily accessible in enantiomerically pure form via PK reaction of trimethylsilylacetylen... A Versatile One-Pot Procedure to Phosphate Monoesters and Pyrophosphates Using Di(p-methoxybenzyl)-N,N-diisopropylphosphoramidite. [作者：van der Heden van Noort, Gerbrand J.;Verhagen, Carlo P.;van der Horst, Maarten G.;Overkleeft, Herman S.;van der Marel, Gijsbert A.;Filippov, Dmitri V.;,期刊：Organic Letters, 页码：4461-4464 , 文章类型： 研究论文，,卷期：2008年10-20] A one-pot procedure for the prepn. of phosphoramidates, phosphorothioates, pyrophosphates, phosphodiesters, and phosphofluoridates has been devised using di(p-methoxybenzyl)-N,N-diisopropylphosphoramidite I as the common...