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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99条记录   Regioselective Synthesis of Sulfonylpyrazoles via Base Mediated Reaction of Diazosulfones with Nitroalkenes and a Facile Entry into Withasomnine [作者：KUMAR RAHUL; NAMBOOTHIRI IRISHI N N,期刊：Organic Letters, 页码：4016-4019 , 文章类型： Article，,卷期：2011年13-15] A base mediated reaction of alpha-diazo-beta-ketosulfone with nitroalkenes affords sulfonylpyrazoles as single regioisomers in excellent yield in a one-pot room temperature reaction. Aryl, heteroaryl, styrenyl, alkyl, hy... Asymmetric Propargylation of Ketones Using Allenylboronates Catalyzed by Chiral Biphenols [作者：BARNETT DAVID S; SCHAUS SCOTT E,期刊：Organic Letters, 页码：4020-4023 , 文章类型： Article，,卷期：2011年13-15] Chiral biphenols catalyze the enantioselective asymmetric propargylation of ketones using allenylboronates. The reaction uses 10 mol % of 3, 3'-Br(2)-BINOL as the catalyst and allenyldioxoborolane as the nucleophile, in ... Synthesis of 7,7 '-Dihydroxy-8,8 '-biquinolyl (azaBINOL) via Pd-Catalyzed Directed Double C-H Functionalization of 8,8 '-Biquinolyl: Emergence of an Atropos from a Tropos State [作者：WANG CHAO; FLANIGAN DARRIN M; ZAKHAROV LEV N; BLAKEMORE PAUL R,期刊：Organic Letters, 页码：4024-4027 , 文章类型： Article，,卷期：2011年13-15] 7,7'-Dihydroxy-8,8'-biquinolyl(azaBINOL) was prepared from 2-chloroaniline in four steps: (1) the Skraup reaction, (2) Ni-catalyzed reductive coupling of 8-chloroquinoline, (3) Pd(II)-catalyzed double C-H functionalizati... Synthesis of L-epi-Capreomycidine Derivatives via C-H Amination [作者：TANINO TETSUYA; ICHIKAWA SATOSHI; MATSUDA AKIRA,期刊：Organic Letters, 页码：4028-4031 , 文章类型： Article，,卷期：2011年13-15] The L-epi-capreomycidine (Cpm) derivatives were efficiently and stereoselectively synthesized via nitrene C-H insertion starling from a readily available D-Tyr. Design of a substrate that takes into account hydrogen bond... S-Alkylation of Thiacalixarenes: A Long-Neglected Possibility in the Calixarene Family [作者：KUNDRAT ONDREJ; EIGNER VACLAV; DVORAKOVA HANA; LHOTAK PAVEL,期刊：Organic Letters, 页码：4032-4035 , 文章类型： Article，,卷期：2011年13-15] Despite the high nucleophilicity of sulfur atoms, thiacalixarenes have been alkylated only on oxygen atoms thus far. Using strong alkylating agents (triflates, trialkyloxonium salts), the substitution of the sulfur bridg... Synthesis of the C7-26 Fragment of Amphidinolides G and H [作者：HARA AKIHIRO; MORIMOTO RYO; ISHIKAWA YUICHI; NISHIYAMA SHIGERU,期刊：Organic Letters, 页码：4036-4039 , 文章类型： Article，,卷期：2011年13-15] A new approach to the synthesis of the C7-26 fragment of amphidinolides G and H was developed. In the sequence, the C7-18 portion of this fragment was synthesized using an acetylide coupling protocol, while an Evans alky... Preventing the Formation of the Long-Lived Colored Transoid-Trans Photoisomer in Photochromic Benzopyrans [作者：SOUSA CEU M; PINA JOAO; DE MELO JOAO SEIZES; BERTHET JEROME; DELBAERE STEPHANIE; COELHO PAULO J,期刊：Organic Letters, 页码：4040-4043 , 文章类型： Article，,卷期：2011年13-15] A new photochromic fused benzopyran presenting a bridge between the pyran double bond and the benzenic ring was prepared. While the UV irradiation of usual benzopyrans leads to the formation of two colored photoisomers w... Asymmetric Fluoroallylboration of Aldehydes [作者：RAMACHANDRAN P VEERARAGHAVAN; TAFELSKAKACZMAREK AGNIESZKA; SAKAVUYI KAUMBA,期刊：Organic Letters, 页码：4044-4047 , 文章类型： Article，,卷期：2011年13-15] Contrary to previous reports, the homologation of benzyloxydifluorovinyllithlum with bulky chiral iodomethylboronates readily provides a series of chiral gamma,gamma-difluoroallylboronates. Asymmetric fluoroallylboration... Efficient Synthesis of beta-Chlorovinylketones from Acetylene in Chloroaluminate Ionic Liquids [作者：SNELDERS DENNIS J M; DYSON PAUL J,期刊：Organic Letters, 页码：4048-4051 , 文章类型： Article，,卷期：2011年13-15] A method for the Friedel-Crafts-type insertion reaction of acetylene with acid chlorides in chloroaluminate ionic liquids is presented. The use of Ionic liquids not only serves to avoid the use of carbon tetrachloride or... Palladium-Catalyzed Cross-Coupling of Benzyl Thioacetates and Aryl Halides [作者：WAGER KRISTA M; DANIELS MATTHEW H,期刊：Organic Letters, 页码：4052-4055 , 文章类型： Article，,卷期：2011年13-15] A method for preparing benzyl aryl thioethers utilizing an in situ deprotection of benzyl thioacetates as an alternative to free thiols as starting materials has been developed and optimized. Good to excellent yields of ... A New Synthesis of Pyrrolidines by Way of an Enantioselective Mannich/Diastereoselective Hydroamination Reaction Sequence [作者：VU JENNY M BAXTER; LEIGHTON JAMES L,期刊：Organic Letters, 页码：4056-4059 , 文章类型： Article，,卷期：2011年13-15] A new two-step synthesis of highly substituted pyrrolidines has been developed. Chiral silane Lewis acid promoted enantioselective Mannich reactions of silyl ketene imines with acylhydrazones may be used to access bishom... Synthesis of 5-Iodo-1,2,3-triazole-Containing Macrocycles Using Copper Flow Reactor Technology [作者：BOGDAN ANDREW R; JAMES KEITH,期刊：Organic Letters, 页码：4060-4063 , 文章类型： Article，,卷期：2011年13-15] A new macrocyclization strategy to synthesize 12- to 31-membered 5-iodo-1,2,3-triazole-containing macrocycles is described. The macrocycles have been generated using a simple and efficient copper-catalyzed cycloaddition ... Looking-Glass Synergistic Pharmacological Chaperones: DGJ and L-DGJ from the Enantiomers of Tagatose [作者：JENKINSON SARAH F; FLEET GEORGE W J; NASH ROBERT J; KOIKE YURIKO; ADACHI ISAO; YOSHIHARA AKIHIDE; MORIMOTO KENJI; IZUMORI KEN; KATO ATSUSHI,期刊：Organic Letters, 页码：4064-4067 , 文章类型： Article，,卷期：2011年13-15] The enantiomers of tagatose are converted to L-DGJ [a noncompetitive inhibitor of human lysosome alpha-galactosidase A (alpha-Gal A), K(i) 38.5 mu M] and DGJ [a competitive inhibitor of alpha-Gal A, K(i) 15.1 nM] in 66% ... Efficient Synthesis of 3,4-Ethylenedioxythiophene (EDOT)-Based Functional pi-Conjugated Molecules through Direct C-H Bond Arylations [作者：LIU CHINGYUAN; ZHAO HAICHAO; YU HSIAOHUA,期刊：Organic Letters, 页码：4068-4071 , 文章类型： Article，,卷期：2011年13-15] A variety of 3,4-ethylenedioxythiophene (EDOT)-based pi-conjugated molecules were efficiently synthesized in good yields through Pd-catalyzed direct C-H bond arylations, wherein a detailed synthetic investigation, includ... Electrosynthesis of Substituted 1H-Indoles from o-Nitrostyrenes [作者：DU PENG; BROSMER JONATHAN L; PETERS DENNIS G,期刊：Organic Letters, 页码：4072-4075 , 文章类型： Article，,卷期：2011年13-15] A novel procedure has been devised for the synthesis of derivatives of 1H-indole that is based on the direct, room-temperature electrochemical reduction of substituted o-nitrostyrenes at carbon cathodes in N,N-dimethylfo... Regioselective Carbon-Carbon Bond Cleavage in the Oxidation of Cyclopropenylcarbinols [作者：BASHEER AHMAD; MISHIMA MASAAKI; MAREK ILAN,期刊：Organic Letters, 页码：4076-4079 , 文章类型： Article，,卷期：2011年13-15] The strained double bond of cyclopropenylcarbinols undergoes a facile oxidation reaction to lead to unsaturated carbonyl derivatives. The distribution of the formed products depends on the relative stability of carbon-ce...