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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   Dianion approach to chiral cyclopropene carboxylic acids. [Erratum to document cited in CA142:134215]. [作者：Liao, Lian-an;Yan, Ni;Fox, Joseph M.;,期刊：Organic Letters, 页码：3931-3931 , 文章类型： 研究论文，,卷期：2008年10-17] The authors found that reactions involving Et2O as a solvent could not be repeated consistently as they could with THF or THF/NMO combinations. The authors are working on an addnl. study concerning the prepn. of cyclopr... A Conjoined Thienopyrrole Oligomer Formed by Using DNA as a Molecular Guide. [作者：Srinivasan, Selvi;Schuster, Gary B.;,期刊：Organic Letters, 页码：3657-3660 , 文章类型： 研究论文，,卷期：2008年10-17] A thienopyrrole oligomer conjoined to DNA was prepd. by a templated synthesis protocol. The oligomer was formed by reaction, initiated with HRP/H2O2, of thieno[3,2-b]pyrrole monomers attached to cytosine bases. The thi... Direct asymmetric intramolecular alkylation of b-alkoxy-a-amino esters via memory of chirality. [作者：Moriyama, Katsuhiko;Sakai, Hiroki;Kawabata, Takeo;,期刊：Organic Letters, 页码：3883-3886 , 文章类型： 研究论文，,卷期：2008年10-17] The intramol. a-alkylation of b-alkoxy-a-amino esters derived from L-serine proceeded predominantly over b-elimination. When b-alkoxy-a-amino esters were treated with powd. CsOH in DMSO at 20 癈, a-alkoxymethyl cyclic am... Facile Synthesis of the Trans-Fused Azabicyclo[3.3.0]octane Core of the Palau'amines and the Tricyclic Core of the Axinellamines from a Common Intermediate. [作者：Zancanella, Manuel A.;Romo, Daniel;,期刊：Organic Letters, 页码：3685-3688 , 文章类型： 研究论文，,卷期：2008年10-17] A facile synthesis of the trans-fused azabicyclo[3.3.0]octane core of palau'amine and related pyrrole-imidazole alkaloids is described. Following g-lactam cleavage with concomitant epimerization at C12 of a previously re... Copper-Catalyzed Cyclization of Iodo-tryptophans: A Straightforward Synthesis of Pyrroloindoles. [作者：Coste, Alexis;Toumi, Mathieu;Wright, Karen;Razafimahaleo, Vanessa;Couty, Francois;Marrot, Jerome;Evano, Gwilherm;,期刊：Organic Letters, 页码：3841-3844 , 文章类型： 研究论文，,卷期：2008年10-17] active alkaloids. Intramol. copper-catalyzed coupling of readily accessible 2-iodo-tryptophan derivs. occurs in excellent yield, affording a wide range of polysubstituted, enantioenriched tetrahydropyrrolo[2,3-b]indoles... Pinacol Macrocyclization-Based Route to the Polyfused Medium-Sized CDE Ring System of Lancifodilactone G. [作者：Paquette, Leo A.;Wah Lai, Kwong;,期刊：Organic Letters, 页码：3781-3784 , 文章类型： 研究论文，,卷期：2008年10-17] The polyfused medium-sized CDE ring system I of lancifodilactone G is assembled via B-alkyl Suzuki-Miyaura cross-coupling and SmI2-mediated pinacol macrocyclization as the key strategic steps. Toward an Efficient Synthesis of Taxane Analogs by Dienyne Ring-Closing Metathesis. [作者：Aldegunde, Maria J.;Castedo, Luis;Granja, Juan R.;,期刊：Organic Letters, 页码：3789-3792 , 文章类型： 研究论文，,卷期：2008年10-17] An efficient tandem ring-closing dienyne metathesis of dienynes derived from cyclohex-2-enone affords the [5.3.1] carbon framework I [MEM = CH2OCH2CH2OMe] characteristic of taxanes in a single-step process. Further ster... Concise Route to Triquinanes from Pyran-2-ones. [作者：Li, Lei;McDonald, Robert;West, F. G.;,期刊：Organic Letters, 页码：3733-3736 , 文章类型： 研究论文，,卷期：2008年10-17] Treatment of ether-bridged cyclooctatrienes ,e.g., I, (formed via intramol. [4+4]-photocycloaddn. of pyran-2-ones, e.g., II, bearing pendent furans, followed by thermal decarboxylation) with excess MeLi furnishes triquin... Two-Step Regio- and Stereoselective Synthesis of cis-Vinylstannanes. [作者：Mirzayans, Paul Malek;Pouwer, Rebecca H.;Williams, Craig M.;,期刊：Organic Letters, 页码：3861-3863 , 文章类型： 研究论文，,卷期：2008年10-17] Herein the authors describe a novel stereoselective synthesis of cis-vinylstannanes employing the widely established Li/Te exchange pathway. In contrast to previously reported methods of cis-selective hydrostannation (i... Direct Carbon-Carbon Bond Formation via Chemoselective Soft Enolization of Thioesters: A Remarkably Simple and Versatile Crossed-Claisen Reaction Applied to the Synthesis of LY294002. [作者：Zhou, Guoqiang;Lim, Daniel;Coltart, Don M.;,期刊：Organic Letters, 页码：3809-3812 , 文章类型： 研究论文，,卷期：2008年10-17] Thioesters undergo chemoselective soft enolization and acylation by N-acylbenzotriazoles on treatment with MgBr2譕Et2 and i-Pr2NEt to give b-keto thioesters, e.g., I (R1 = CH2tBu, Ph, i-Pr, C6H11; R2 = Me, n-Pr, Bn, OBn).... Sonogashira Couplings of Aryl Bromides: Room Temperature, Water Only, No Copper. [作者：Lipshutz, Bruce H.;Chung, David W.;Rich, Brian;,期刊：Organic Letters, 页码：3793-3796 , 文章类型： 研究论文，,卷期：2008年10-17] Cross-coupling reactions between lipophilic terminal alkynes and aryl bromides can be catalyzed by ligated Pd, in the absence of copper, in pure water at ambient temps. Small amts. of the nonionic amphiphile PTS assist ... Synthesis of Functionalized a,a-Disubstituted b-Alkynyl Esters from Allenoates through an Alkynylenolate Intermediate. [作者：Wang, Weibo;Xu, Bo;Hammond, Gerald B.;,期刊：Organic Letters, 页码：3713-3716 , 文章类型： 研究论文，,卷期：2008年10-17] from allenyl esters and either alkyl halide, acid chloride, or alkyl chloroformate, mediated by an amide base. This highly efficient and mild process tolerates various functional groups and provides a,a-disubstituted b-... Simple molecule-based fluorescent sensors for vapor detection of TNT. [作者：Zyryanov, Grigory V.;Palacios, Manuel A.;Anzenbacher, Pavel, Jr.;,期刊：Organic Letters, 页码：3681-3684 , 文章类型： 研究论文，,卷期：2008年10-17] 1,4-Diarylpentiptycenes were synthesized from 1,4-dichloro- or 1,4-difluoro-2,5-diarylbenzene derivs. by double base-promoted dehydrohalogenation to give corresponding arynes, which in the presence of anthracene undergo ... Asymmetric Enamide Hydrogenation Using Phosphinite Thioglycosides: Synthesis of D- and L-Amino esters Using D-Sugars as Catalyst Precursors. [作者：Khiar, Noureddine;Navas, Raquel;Suarez, Belen;Alvarez, Eleuterio;Fernandez, Inmaculada;,期刊：Organic Letters, 页码：3697-3700 , 文章类型： 研究论文，,卷期：2008年10-17] Diastereomerically pure cationic Rh(I) complexes derived from phosphinite thioglycosides were used as catalysts in highly enantioselective hydrogenations of enamides. The conformational similarity of a-D-arabinopyranose... Enzyme-catalyzed synthesis of furanosyl nucleotides. [Erratum to document cited in CA148:239441]. [作者：Timmons, Shannon C.;Hui, Joseph P. M.;Pearson, Jessica L.;Peltier, Pauline;Daniellou, Richard;Nugier-Chauvin, Caroline;Soo, Evelyn C.;Syvitski, Ray T.;Ferrieres, Vincent;Jakeman, David L.;,期刊：Organic Letters, 页码：3931-3931 , 文章类型： 研究论文，,卷期：2008年10-17] correct several typog. errors. First, Table S1 has been added to the Table of Contents. Second, in Table S1, "furanosyl-1-phosphate" has been changed to "furanose-1-phosphate" and a/b in the sixth entry from the bottom... Efficient Synthesis of Fluorophosphonylated Alkyles by Ring-Opening Reaction of Cyclic Sulfates. [作者：Diab, Sonia Amel;Sene, Aboubacary;Pfund, Emmanuel;Lequeux, Thierry;,期刊：Organic Letters, 页码：3895-3898 , 文章类型： 研究论文，,卷期：2008年10-17] Ring-opening reactions of functionalized 1,2-cyclic sulfates and oxetanes with the phosphonodifluoromethyl carbanion are reported. This approach allows an easy access to fluorinated b-hydroxyphosphonates that are buildin...