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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96条记录   N-Bromosuccinimide Initiated One-Pot Synthesis of Imidazoline [作者：ZHOU LING; ZHOU JING; TAN CHONG KIAT; CHEN JIE; YEUNG YINGYEUNG,期刊：Organic Letters, 页码：2448-2451 , 文章类型： Article，,卷期：2011年13-9] A novel cationic Br initiated one-pot imidazoline synthesis has been developed using olefin, nitrile, amine, and N-bromosuccinimide. The olefinic substrates and the nitrile partners can be flexibly varied to achieve a ra... Fluorenone Synthesis by Palladacycle-Catalyzed Sequential Reactions of 2-Bromobenzaldehydes with Arylboronic Acids [作者：LIU TAOPING; LIAO YUANXI; XING CHUNHUI; HU QIAOSHENG,期刊：Organic Letters, 页码：2452-2455 , 文章类型： Article，,卷期：2011年13-9] A new, anionic four-electron donor-based (type I) palladacycle-catalyzed sequential reaction of 2-bromobenzaldehydes with arylboronic acids based on the addition reaction, cyclization via C-H activation-oxidation sequenc... Determination of Hydride Affinities of Various Aldehydes and Ketones in Acetonitrile [作者：ZHU XIAOQING; CHEN XI; MEI LIANRUI,期刊：Organic Letters, 页码：2456-2459 , 文章类型： Article，,卷期：2011年13-9] The hydride affinities of 21 typical aldehydes and ketones in acetonitrile were determined by using an experimental method, which is valuable for chemists choosing suitable reducing agents to reduce them. The focus of th... Copper-Catalyzed Enantioselective Propargylic Amination of Nonaromatic Propargylic Esters with Amines [作者：YOSHIDA AKIKO; HATTORI GAKU; MIYAKE YOSHIHIRO; NISHIBAYASHI YOSHIAKI,期刊：Organic Letters, 页码：2460-2463 , 文章类型： Article，,卷期：2011年13-9] The enantioselective propargylic amination of propargylic pentafluorobenzoates bearing an alkyl group at the propargylic position with amines in the presence of catalytic amounts of a copper complex and an optically acti... A Dual-Catalysis/Anion-Binding Approach to the Kinetic Resolution of Allylic Amines [作者：KLAUBER ERIC G; MITTAL NISHA; SHAH TEJAS K; SEIDEL DANIEL,期刊：Organic Letters, 页码：2464-2467 , 文章类型： Article，,卷期：2011年13-9] A dual-catalysis approach enables the small-molecule catalyzed kinetic resolution of allylic amines by acylation. By employing 2 mol % of each 4-(pyrrolidin D)pyridine (PPY) and a readily available chiral hydrogen-bondin... Enantiopure 1,4-Diols and 1,4-Aminoalcohols via Stereoselective Acyclic Sulfoxide-Sulfenate Rearrangement [作者：FERNANDEZ DE LA PRADILLA ROBERTO; COLOMER IGNACIO; URENA MERCEDES; VISO ALMA,期刊：Organic Letters, 页码：2468-2471 , 文章类型： Article，,卷期：2011年13-9] Treatment of acyclic alpha-hydroxy and alpha-tosylamino sulfinyl dienes with amines affords enantiopure 1,4-diol or 1,4-hydroxysulfonamide derivatives in good yields and diastereoselectivities. This one-pot procedure ent... Organocatalytic Direct Asymmetric Aldol Reactions of 3-Isothiocyanato Oxindoles to Ketones: Stereocontrolled Synthesis of Spirooxindoles Bearing Highly Congested Contiguous Tetrasubstituted Stereocenters [作者：CHEN WENBING; WU ZHIJUN; HU JING; CUN LINFENG; ZHANG XIAOMEI; YUAN WEICHENG,期刊：Organic Letters, 页码：2472-2475 , 文章类型： Article，,卷期：2011年13-9] The first example of a direct catalytic asymmetric intermolecular aldol reaction of 3-isothiocyanato oxindoles to simple ketones with bifunctional thiourea-tertiary amine as catalyst is reported. This strategy provides a... Synthetic Studies on Lytophilippine A: Synthesis of the Proposed Structure [作者：JANG KI PO; CHOI SOO YOUNG; CHUNG YOUNG KEUN; LEE EUN,期刊：Organic Letters, 页码：2476-2479 , 文章类型： Article，,卷期：2011年13-9] Synthesis of the proposed structure of lytophilippine A was accomplished employing SmI2-mediated 5-exo cyclization of an aldehydo beta-alkoxyvinyl sulfoxide and ring-closing metathesis reaction. Synthesis and Racemization Process of Chiral Carbon Nanorings: A Step toward the Chemical Synthesis of Chiral Carbon Nanotubes [作者：OMACHI HARUKA; SEGAWA YASUTOMO; ITAMI KENICHIRO,期刊：Organic Letters, 页码：2480-2483 , 文章类型： Article，,卷期：2011年13-9] A simple and realistic model for the shortest sidewall segments of chiral single-walled carbon nanotubes (SWNTs) has been designed, and one of the chiral carbon nanorings, cyclo[13]paraphenylene-2,6-naphthylene ([13]CPPN... C(21)-C(40) of Tetrafibricin via Metal Catalysis: Beyond Stoichlometric Chiral Reagents, Auxiliaries, and Premetalated Nucleophiles [作者：KUMPULAINEN ESA T T; KANG BYUNGSOO; KRISCHE MICHAEL J,期刊：Organic Letters, 页码：2484-2487 , 文章类型： Article，,卷期：2011年13-9] The C(21)-C(40) fragment of fibrinogen receptor inhibitor tetrafibricin was prepared in 12 steps from propane diol (longest linear sequence). In this approach, 6 C-C bonds are formed via asymmetric iridium catalyzed tran... cis-2,5-Diaminobicyclo[2.2.2]octane, a New Scaffold for Asymmetric Catalysis via Salen-Metal Complexes [作者：WHITE JAMES D; SHAW SUBRATA,期刊：Organic Letters, 页码：2488-2491 , 文章类型： Article，,卷期：2011年13-9] A new C-2 symmetric salen scaffold based on cis-2,5-diaminobicyclo[2.2.2]octane has been synthesized that forms complexes with a wide range of metals. The chromium(III) complex is shown to catalyze the hetero-Diels-Alder... Scope of the Inverse Electron Demand Diels-Alder Reactions of 1,2,3-Triazine [作者：ANDERSON ERIN D; BOGER DALE L,期刊：Organic Letters, 页码：2492-2494 , 文章类型： Article，,卷期：2011年13-9] An examination of the scope of the inverse electron demand Diels-Alder reactions of the parent unsubstituted 1,2,3-triazine is described including the first report of its unique capabilities for participating in previous... Palladium Catalyzed Alkoxy- and Aminocarbonylation of Vinyl Tosylates [作者：REEVES DIANA C; RODRIGUEZ SONIA; LEE HEEWON; HADDAD NIZAR; KRISHNAMURTHY DHILEEPKUMAR; SENANAYAKE CHRIS H,期刊：Organic Letters, 页码：2495-2497 , 文章类型： Article，,卷期：2011年13-9] The palladium catalyzed alkoxycarbonylation and aminocarbonylation of vinyl tosylates are described. A variety of ketone and aldehyde derived vinyl tosylates may be carbonylated in the presence of primary, secondary, and... meso-Aryl Triphyrin(2.1.1) [作者：ANJU K S; RAMAKRISHNAN S; SRINIVASAN A,期刊：Organic Letters, 页码：2498-2501 , 文章类型： Article，,卷期：2011年13-9] Synthesis, spectral, and single-crystal X-ray structural analysis of meso-aryl triphyrin(2.1.1) featuring three pyrrole rings and four meso-aryl rings are described. The title compound represents the first example of a r... Tailor-Made Hexaethylene Glycolic Ionic Liquids as Organic Catalysts for Specific Chemical Reactions [作者：JADHAV VINOD H; JEONG HWANJEONG; LIM SEOK TAE; SOHN MYUNGHEE; KIM DONG WOOK,期刊：Organic Letters, 页码：2502-2505 , 文章类型： Article，,卷期：2011年13-9] Hexaethylene glycol substituted imidazolium based ionic liquids (hexaEGILs) were designed and prepared well-tailored to a specific organic reaction using alkali-metal fluorides (MFs) as multifunctional organic catalysts.... Total Synthesis of Hoiamide C [作者：WANG LEI; XU ZHENGSHUANG; YE TAO,期刊：Organic Letters, 页码：2506-2509 , 文章类型： Article，,卷期：2011年13-9] Hoiamide C was synthesized in 16 steps with an overall yield of 1.8% starting from homoallylic alcohol 18, unambiguously confirming its structure.