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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57条记录   Ring Expansion of Lactones and Lactams via Propiolate 1-Carbon Intercalation. [作者：Grant, Tina N.;Benson, Chantel L.;West, F. G.;,期刊：Organic Letters, 页码：3985-3988 , 文章类型： 研究论文，,卷期：2008年10-18] Readily available five- and six-membered lactones and N-sulfonyllactams undergo efficient addn. of t-Bu propiolate, and the resulting adducts undergo cycloisomerization to six- and seven-membered cyclic ethers or amines ... Interrupting the Nazarov Cyclization with Indoles. [作者：Basak, Ashok K.;Tius, Marcus A.;,期刊：Organic Letters, 页码：4073-4076 , 文章类型： 研究论文，,卷期：2008年10-18] A carbon-terminated interrupted Nazarov reaction is described. The trimethylsilyl enol ethers derived from propargyl vinyl ketones undergo selective proton transfer at the distal acetylenic carbon atom to provide alleny... Synthesis and Properties of Butyl-Capped Dehydrothieno[14]annulenes and Their Conversion into Terthiophenes. [作者：O'Connor, Matthew J.;Haley, Michael M.;,期刊：Organic Letters, 页码：3973-3976 , 文章类型： 研究论文，,卷期：2008年10-18] A series of Bu end-capped dehydrothieno[14]annulenes (DTAs), e. g. I, has been prepd. These compds. were further transformed into electron-rich terthiophenes (3TPs), e. g. II, by reaction with sodium sulfide. The DTA a... Synthesis of 1,1-Disubstituted Olefins via Catalytic Alkyne Hydrothiolation/Kumada Cross-Coupling. [作者：Sabarre, Anthony;Love, Jennifer;,期刊：Organic Letters, 页码：3941-3944 , 文章类型： 研究论文，,卷期：2008年10-18] Using recently developed methodol. for the regioselective formation of branched alkyl vinyl sulfides, we report a convenient route to 1,1-disubstituted olefins. We demonstrate that n-propanethiol successfully undergoes ... Total Synthesis of the Immunosuppressants Myriocin and 2-epi-Myriocin. [作者：Jones, Matthew C.;Marsden, Stephen P.;,期刊：Organic Letters, 页码：4125-4128 , 文章类型： 研究论文，,卷期：2008年10-18] Total syntheses of the natural immunosuppressant myriocin (I) and the equipotent unnatural analog 2-epi-myriocin (in protected form) have been achieved through a common strategy. The key transformations are the efficien... Preference of b-Lactam Formation in Cu(I)-Catalyzed Intramolecular Coupling of Amides with Vinyl Bromides. [作者：Zhao, Qiwu;Li, Chaozhong;,期刊：Organic Letters, 页码：4037-4040 , 文章类型： 研究论文，,卷期：2008年10-18] A general and highly efficient synthesis of 4-alkylidene-2-azetidinones, e.g. I, was achieved by the Cu(I)-catalyzed intramol. C-N coupling of amides with vinyl bromides. This 4-exo ring closure was found to be of cycli... Selective Monolithiation of Dibromobiaryls Using Microflow Systems. [作者：Nagaki, Aiichiro;Takabayashi, Naofumi;Tomida, Yutaka;Yoshida, Jun-ichi;,期刊：Organic Letters, 页码：3937-3940 , 文章类型： 研究论文，,卷期：2008年10-18] Selective monolithiation of 2,2'-dibromobiphenyl, 4,4'-dibromobiphenyl, 2,7-dibromo-9,9-dioctylfluorene, 2,2'-dibromo-1,1'-binaphthyl, and 5,5'-dibromo-2,2'-bithiophene, with 1 equiv of butyllithium followed by reaction ... Catalyst-Directed Diastereoselectivity in Hydrogenative Couplings of Acetylene to a-Chiral Aldehydes: Formal Synthesis of All Eight L-Hexoses. [作者：Han, Soo Bong;Kong, Jong Rock;Krische, Michael J.;,期刊：Organic Letters, 页码：4133-4135 , 文章类型： 研究论文，,卷期：2008年10-18] Hydrogenative coupling of acetylene to a-chiral aldehydes using enantiomeric rhodium catalysts ligated by (S)-MeO-BIPHEP and (R)-MeO-BIPHEP delivers the diastereomeric products of carbonyl-(Z)-butadienylation with good t... Stereoselective Oxidative Rearrangement of 2-Aryl Tryptamine Derivatives. [作者：Movassaghi, Mohammad;Schmidt, Michael A.;Ashenhurst, James A.;,期刊：Organic Letters, 页码：4009-4012 , 文章类型： 研究论文，,卷期：2008年10-18] The oxidn. of 2-aryl tryptamines followed by a stereoselective rearrangement provides a versatile strategy for the synthesis of C3-quaternary oxindoles bearing a C3-aryl group. Treatment of optically active 2-aryl hydro... A New Catalytic Cu(II)/Sparteine Oxidant System for b,b-Phenolic Couplings of Styrenyl Phenols: Synthesis of Carpanone and Unnatural Analogs. [作者：Daniels, R. Nathan;Fadeyi, Olugbeminiyi O.;Lindsley, Craig W.;,期刊：Organic Letters, 页码：4097-4100 , 文章类型： 研究论文，,卷期：2008年10-18] A new catalytic Cu(II)/sparteine system has been developed to promote b,b-phenolic couplings of styrenyl phenols en route to carpanone and related unnatural congeners (e.g. I) in yields exceeding 85%. Expanding the Porphyrin p-System by Fusion with Anthracene. [作者：Davis, Nicola K. S.;Pawlicki, Milosz;Anderson, Harry L.;,期刊：Organic Letters, 页码：3945-3947 , 文章类型： 研究论文，,卷期：2008年10-18] Synthesis of b,meso,b-anthracene triply fused and b,meso-anthracene doubly fused porphyrins was achieved via oxidative intramol. ring closure of meso-(9-anthryl)porphyrins and meso-(1-anthryl)porphyrins, resp. Fusion wa... Light Emission of [10]Cyclophenacene through Energy Transfer from Neighboring Carbazolylphenyl Dendrons. [作者：Zhang, Xiaoyong;Matsuo, Yutaka;Nakamura, Eiichi;,期刊：Organic Letters, 页码：4145-4147 , 文章类型： 研究论文，,卷期：2008年10-18] Photochemistry, and Photographic and Other Reprographic A dendritic deca(carbazolylphenyl)[60]fullerene bearing a cyclic benzenoid core was synthesized. The photophys. studies indicated that intramol. energy transfer an... Intramolecular Direct Aldol Reactions of Sugar Diketones: Syntheses of Valiolamine and Validoxylamine G. [作者：Shing, Tony K. M.;Cheng, Hau M.;,期刊：Organic Letters, 页码：4137-4139 , 文章类型： 研究论文，,卷期：2008年10-18] derived from carbohydrates has been developed to construct carbocycles with D-gluco-, D-galacto-, D-manno-, and L-ido-configurations. The stereochem. outcome of the aldol reaction of the diketone is dependent on the bas... Stereoselective Direct Copper-Catalyzed Alkenylation of Oxazoles with Bromoalkenes. [作者：Besselievre, Francois;Piguel, Sandrine;Mahuteau-Betzer, Florence;Grierson, David S.;,期刊：Organic Letters, 页码：4029-4032 , 文章类型： 研究论文，,卷期：2008年10-18] A copper-catalyzed direct alkenylation of oxazoles with bromoalkenes has been developed. The method is both regio- and stereoselective and tolerates a variety of functional groups. A wide range of 2-E-vinyl-substituted... Proline as Lewis Base Catalyst: Diastereoselective Synthesis of Isoxazoline-N-oxide through [3 + 2] Cycloaddition. [作者：Duan, Haifeng;Sun, Xiaohua;Liao, Wenyan;Petersen, Jeffrey L.;Shi, Xiaodong;,期刊：Organic Letters, 页码：4113-4116 , 文章类型： 研究论文，,卷期：2008年10-18] A catalytic cascade synthesis of isoxazoline-N-oxide, e.g., I, was developed through proline-catalyzed nitroalkene activation. A large substrate scope was obtained with good to excellent yields. Mechanistic studies reve... Synthesis of Functionalized Oxazolones by a Sequence of Cu(II)- and Au(I)-Catalyzed Transformations. [Erratum to document cited in CA148:331593]. [作者：Istrate, Florin M.;Buzas, Andrea K.;Jurberg, Igor Dias;Odabachian, Yann;Gagosz, Fabien;,期刊：Organic Letters, 页码：4153-4153 , 文章类型： 研究论文，,卷期：2008年10-18] On page 926, refs. concerning R. Danhieser (2005); (2006) and (2007) were inadvertantly omitted. The refs. are given.