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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400948条记录   An Access to Aza-Freidinger Lactams and E-Locked Analogs [作者：OTTERSBACH PHILIPP A; SCHMITZ JANINA; SCHNAKENBURG GREGOR; GUETSCHOW MICHAEL,期刊：Organic Letters, 页码：448-451 , 文章类型： Article，,卷期：2013年15-3] Freidinger lactams, possessing a peptide bond configuration locked to 4 are important key elements of conformationally restricted peptidomimetics. In the present work, the C alpha Hi+1 unit has been replaced by N, leadin... TCA Cycle Involved Enzymes SucA and Kgd, as well as MenD: Efficient Biocatalysts for Asymmetric C-C Bond Formation [作者：BEIGI MARYAM; WALTZER SIMON; FRIES ALEXANDER; EGGELING LOTHAR; SPRENGER GEORG A; MUELLER MICHAEL,期刊：Organic Letters, 页码：452-455 , 文章类型： Article，,卷期：2013年15-3] Asymmetric mixed carboligation reactions of alpha-ketoglutarate with different aldehydes were explored with the thiamine diphosphate dependent enzymes SucA from E. coil, Kgd from Mycobacterium tuberculosis, and MenD from... Diastereoselective Intramolecular Carbamoylketene/Alkene [2+2] Cycloaddition: Enantioselective Access to Pyrrolidinoindoline Alkaloids [作者：ARAKI TAKAAKI; OZAWA TSUKASA; YOKOE HIROMASA; KANEMATSU MAKOTO; YOSHIDA MASAHIRO; SHISHIDO KOZO,期刊：Organic Letters, 页码：200-203 , 文章类型： Article，,卷期：2013年15-1] A novel and highly diastereoselective intramolecular carbamoylketene/alkene [2 + 2] cycloaddition has been developed, and the methodology was successfully applied to the enantioselective syntheses of (-)-esermethole and ... One-Pot Formation of Chiral Polysubstituted 3,4-Dihydropyrans via a Novel Organocatalytic Domino Sequence Involving Alkynal Self-Condensation [作者：DONG LIJIN; FAN TIANTIAN; WANG CHAO; SUN JIAN,期刊：Organic Letters, 页码：204-207 , 文章类型： Article，,卷期：2013年15-1] The self-condensation of alkynals was for the first time implemented under mild organocatalytic conditions and was successfully linked with a domino organocatalytic inverse-electron-demand oza-Diels-Alder reaction, which... Amidinate Salt of Hexafluoroacetone Hydrate for the Preparation of Fluorinated Compounds by the Release of Trifluoroacetate [作者：RIOFSKI MARK V; HART ALLISON D; COLBY DAVID A,期刊：Organic Letters, 页码：208-211 , 文章类型： Article，,卷期：2013年15-1] A powerful, new reagent, an amidinate salt of hexafluoroacetone hydrate, is an air-stable salt that can be used for the preparation of fluorinated organic molecules. Nucleophilic trifluoromethylation reactions are demons... Copper-Catalyzed Aliphatic C-H Amination with an Amidine Moiety [作者：CHEN HUI; SANJAYA STEPHEN; WANG YIFENG; CHIBA SHUNSUKE,期刊：Organic Letters, 页码：212-215 , 文章类型： Article，,卷期：2013年15-1] A method for amination of aliphatic C-H bonds of N-alkylamidines is described that utilizes Cu(OAc)(2) as the catalyst in the presence of Phl(OAc)(2) and K3PO4. The resulting products, dihydroimidazoles and tetrahydropyr... Chromogenic and Fluorogenic Sensing of Biological Thiols in Aqueous Solutions Using BODIPY-Based Reagents [作者：ISIK MURAT; OZDEMIR TUGBA; TURAN IIKE SIMSEK; KOLEMEN SAFACAN; AKKAYA ENGIN U,期刊：Organic Letters, 页码：216-219 , 文章类型： Article，,卷期：2013年15-1] Judicious design of BODIPY dyes carrying nitroethenyl substituents in conjugation with the BODIPY core yields dyes that respond to biological thiols by both absorbance and emission changes. Incorporation of solubilizing ... Synthesis and Bioconversions of Notoamide T: A Biosynthetic Precursor to Stephacidin A and Notoamide B [作者：SUNDERHAUS JAMES D; MCAFOOS TIMOTHY J; FINEFIELD JENNIFER M; KATO HIKARU; LI SHENGYING; TSUKAMOTO SACHIKO; SHERMAN DAVID H; WILLIAMS ROBERT M,期刊：Organic Letters, 页码：22-25 , 文章类型： Article，,卷期：2013年15-1] In an effort to further elucidate the biogenesis of the stephacidin and notoamide families of natural products, notoamide T has been identified as the likely precursor to stephacidin A. The total synthesis of notoamide T... Asymmetric Vinylogous Aldol Reaction via H-Bond-Directing Dienamine Catalysis [作者：BASTIDA DAVID; LIU YANKAI; TIAN XU; ESCUDEROADAN EDUARDO; MELCHIORRE PAOLO,期刊：Organic Letters, 页码：220-223 , 文章类型： Article，,卷期：2013年15-1] The enantioselective direct vinylogous aldol reaction of 3-methyl 2-cyclohexen-1-one with alpha-keto esters has been developed. The key to success was the design of a bifunctional primary amine-thiourea catalyst that can... A Unique Cascade Reaction between 3-Arylprop-2-inylcarboxylates and Benzaldehydes Leading to the Formation of Morita-Baylis-Hillman Adducts [作者：KARPAVICIENE IEVA; CIKOTIENE INGA,期刊：Organic Letters, 页码：224-227 , 文章类型： Article，,卷期：2013年15-1] During an alkyne-carbonyl metathesis reaction between electron-rich 3-arylprop-2-inylcarboxylates and electron-poor benzaldehydes, a smooth migration of carboxylate groups takes place. This unique cascade reaction allows... Stereoselective Synthesis of 1,3-anti Diols by an Ipc-Mediated Domino Aldol-Coupling/Reduction Sequence [作者：DIECKMANN MICHAEL; MENCHE DIRK,期刊：Organic Letters, 页码：228-231 , 文章类型： Article，,卷期：2013年15-1] A novel domino process for 1,3-anti diol synthesis by the union of a methyl ketone with an aldehyde is described. The operationally simple procedure is based on an Ipc-boron-aldol coupling and subsequent Ipc-mediated red... Synthesis of Tricyclic Lactams from Heterocyclic Imines [作者：STALLING TIMO; MARTENS JUERGEN,期刊：Synthesis, 页码：355-364 , 文章类型： Article，,卷期：2013年45-3] Starting from different heterocyclic imines, a large number of annulated tricyclic lactams were prepared in a two-step synthesis. First, methoxyamides with a phenyl ring in alpha- or beta-position were generated. Finally... Efficient Synthesis of 5H-Indazolo[3,2-b]-1,3,4-benzotriazepines by a Tandem Aza-Wittig Cyclization [作者：ZHAO FENFEN; ZHANG HAO; DING MINGWU,期刊：Synthesis, 页码：365-369 , 文章类型： Article，,卷期：2013年45-3] 5H-Indazolo[3,2-b]-1,3,4-benzotriazepines were directly prepared by the reaction of azides with triphenylphosphine via a tandem aza-Wittig cyclization in good yields. A New Method for the Benzylic Oxidation of Alkylarenes Catalyzed by Hypervalent Iodine(III) [作者：XU YUAN; YANG ZHENPING; HU JIANTAO; YAN JIE,期刊：Synthesis, 页码：370-374 , 文章类型： Article，,卷期：2013年45-3] A convenient and simple procedure is described for the oxidation of the benzylic C-H moiety of alkylarenes to give the corresponding aryl ketones, using tert-butyl hydroperoxide and m-chloroperoxybenzoic acid in the pres... Three-Component Condensation for the Construction of Novel Spirooxindoles [作者：JI FEI; SUN MU; LV MEIFANG; YI WENBIN; CAI CHUN,期刊：Synthesis, 页码：375-381 , 文章类型： Article，,卷期：2013年45-3] A new route for the synthesis of novel spirooxindoles from isocyanides, dialkyl acetylenedicarboxylates, and N-substituted isatylidene derivatives through [3+2] cycloaddition has been developed. This method has several a... Bifunctional Tertiary Phosphine-Catalyzed Cascade Michael-Henry Reaction of a beta-Nitroolefin and a 2-(1-Substituted 3-oxo-3-phenylpropyl)malononitrile [作者：WANG YING; YUAN WEI; ZHENG HUFEI; SHI DEQING,期刊：Synthesis, 页码：382-388 , 文章类型： Article，,卷期：2013年45-3] The bifunctional phosphine catalyst 2'-(diphenylphosphino)biphenyl-2-ol was used in an effective synthesis of highly functionalized cyclohexanols through a cascade Michael-Henry reaction of a beta-nitroolefin and a 2-(1-...