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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   Copper-Catalyzed Alkyne-Aryne and Alkyne-Alkene-Aryne Coupling Reactions. [作者：Xie, Chunsong;Liu, Leifang;Zhang, Yuhong;Xu, Peixin;,期刊：Organic Letters, 页码：2393-2396 , 文章类型： 研究论文，,卷期：2008年10-12] The efficient copper-catalyzed two-component coupling reaction of alkynes with arynes and the three-component coupling reaction of alkynes with allylic chlorides and arynes have been developed. Copper acetylide was post... Camphor Sulfonyl Hydrazines (CaSH) as Organocatalysts in Enantioselective Diels-Alder Reactions. [作者：He, Hao;Pei, Bao-Jian;Chou, Ho-Hsuan;Tian, Tian;Chan, Wing-Hong;Lee, Albert W. M.;,期刊：Organic Letters, 页码：2421-2424 , 文章类型： 研究论文，,卷期：2008年10-12] Cyclic sulfonyl hydrazine was demonstrated for the first time as a new functionality for organocatalysis. A series of six-membered cyclic hydrazines derived from camphor sulfonic acid were synthesized. With trichloroac... Organocatalytic Enantioselective Domino Michael-aldol Condensation of 5-Oxoalkanal and a,b-Unsaturated Aldehydes. Efficient Assembly of Densely Functionalized Cyclohexenes. [作者：Hong, Bor-Cherng;Nimje, Roshan Y.;Sadani, Amit A.;Liao, Ju-Hsiou;,期刊：Organic Letters, 页码：2345-2348 , 文章类型： 研究论文，,卷期：2008年10-12] Organocatalytic Michael reaction of glutaraldehyde and 3-arylpropenals followed by the subsequent intramol. aldol condensation provided 2-arylcyclohex-3-ene-1,3-dicarbaldehydes. Reactions with 5-oxohexanal afforded high... Copper-Catalyzed Reaction of Alkyl Halides with Cyclopentadienylmagnesium Reagent. [作者：Sai, Masahiro;Someya, Hidenori;Yorimitsu, Hideki;Oshima, Koichiro;,期刊：Organic Letters, 页码：2545-2547 , 文章类型： 研究论文，,卷期：2008年10-12] Treatment of alkyl halides, including tertiary alkyl bromides, with cyclopentadienylmagnesium bromide in the presence of a catalytic amt. of copper(II) triflate yielded the corresponding cyclopentadienylated products in ... The Cyclopropyl Group as a Hypersensitive Probe in the Singlet Oxygen Ene Reaction Mechanism. [作者：Alberti, Mariza N.;Orfanopoulos, Michael;,期刊：Organic Letters, 页码：2465-2468 , 文章类型： 研究论文，,卷期：2008年10-12] Cyclopropyl-substituted olefins are employed as mechanistic probes in the singlet oxygen-alkene ene reaction. In MeOH and aprotic solvents [CHCl3, (CH3)2CO, CH3CN], only the allylic hydroperoxides bearing an intact cycl... Carbon Tetrabromide-Mediated Carbon-Sulfur Bond Formation via a Sulfenyl Bromide Intermediate. [作者：Tan, Jing;Liang, Fushun;Wang, Yeming;Cheng, Xin;Liu, Qun;Yuan, Hongjuan;,期刊：Organic Letters, 页码：2485-2488 , 文章类型： 研究论文，,卷期：2008年10-12] xanthates, dithioesters, and thioethers were prepd. in one pot by reacting the corresponding dithioic acids or thiols with active methylene compds./indole derivs. under mild conditions. The formation of a sulfenyl bromi... Second-Generation Tags for Fluorous Chemistry Exemplified with a New Fluorous Mitsunobu Reagent. [作者：Chu, Qianli;Henry, Christopher;Curran, Dennis P.;,期刊：Organic Letters, 页码：2453-2456 , 文章类型： 研究论文，,卷期：2008年10-12] A new fluorous DEAD reagent bearing two perfluoro-tert-butyloxy groups with propylene spacers shows excellent promise for use in fluorous Mitsunobu reactions. Pure target products were obtained in good yields after remo... Ariakemicins A and B, Novel Polyketide-peptide Antibiotics from a Marine Gliding Bacterium of the Genus Rapidithrix. [作者：Oku, Naoya;Adachi, Kyoko;Matsuda, Satoru;Kasai, Hiroaki;Takatsuki, Akira;Shizuri, Yoshikazu;,期刊：Organic Letters, 页码：2481-2484 , 文章类型： 研究论文，,卷期：2008年10-12] Ariakemicins A (1) and B (2), unusual linear hybrid polyketide-nonribosomal peptide antibiotics, were discovered from the fermn. ext. of the marine gliding bacterium Rapidithrix sp. These metabolites were positional iso... Multisignal Chemosensor for Cr3+ and Its Application in Bioimaging. [作者：Huang, Kewei;Yang, Hong;Zhou, Zhiguo;Yu, Mengxiao;Li, Fuyou;Gao, Xia;Yi, Tao;Huang, Chunhui;,期刊：Organic Letters, 页码：2557-2560 , 文章类型： 研究论文，,卷期：2008年10-12] A multisignal sensor based on rhodamine B with a ferrocene substituent (FD7, I) has been developed as a highly sensitive chemosensor for Cr3+. A prominent fluorescence enhancement was found in the presence of Cr3+, whic... Design and synthesis of macrocyclic peptomers as mimics of a quorum sensing signal from Staphylococcus aureus. [作者：Fowler, Sarah A.;Stacy, Danielle M.;Blackwell, Helen E.;,期刊：Organic Letters, 页码：2329-2332 , 文章类型： 研究论文，,卷期：2008年10-12] We report the design and synthesis of macrocyclic peptide-peptoid hybrids (peptomers) as analogs of autoinducing peptide I (AIP-I) from Staphylococcus aureus. Our solid-phase synthetic route includes efficient microwave... Synthesis of Spiro-bisperoxyketals. [作者：Ghorai, Prasanta;Dussault, Patrick H.;Hu, Chunhua;,期刊：Organic Letters, 页码：2401-2404 , 文章类型： 研究论文，,卷期：2008年10-12] Syntheses of spirocyclic bis-1,2-dioxolanes, bis-1,2-dioxanes, and bis-1,2-dioxepanes are achieved through intramol. ketalizations of hydroperoxy ketones or intramol. alkylations of gem-dihydroperoxides. The spiroperoxid... Benzyne click chemistry: synthesis of benzotriazoles from benzynes and azides. [作者：Shi, Feng;Waldo, Jesse P.;Chen, Yu;Larock, Richard C.;,期刊：Organic Letters, 页码：2409-2412 , 文章类型： 研究论文，,卷期：2008年10-12] A variety of substituted benzotriazoles have been prepd. by the [3 + 2] cycloaddn. of azides to benzynes. The reaction scope is quite general, affording a rapid and easy entry to substituted, functionalized benzotriazol... Catalytic atropo-Enantioselective Reduction of Biaryl Lactones to Axially Chiral Biaryl Compounds. [作者：Ashizawa, Tomoko;Tanaka, Saiko;Yamada, Tohru;,期刊：Organic Letters, 页码：2521-2524 , 文章类型： 研究论文，,卷期：2008年10-12] The atropo-enantioselective borohydride redn. with dynamic kinetic resoln. of biaryl lactones, e.g. I (R = H, Cl, Me, AcO, etc.), was catalyzed by an optically active b-ketoiminatocobalt(II) complex to afford optically a... Intramolecular Nicholas reaction: Stereoselective synthesis of 5-alkynylproline derivatives. [作者：Hernandez, J. Nicolas;Ramirez, Miguel A.;Rodriguez, Matias L.;Martin, Victor S.;,期刊：Organic Letters, 页码：2349-2352 , 文章类型： 研究论文，,卷期：2008年10-12] The intramol. Nicholas reaction of propargylic alcs. derived from N,N-acyl-diprotected w-semialdehydes obtained from glutamic acid provided stereoselectively 5-alkynylproline derivs. The suitable choice of the N-protect... Stereoselective Synthesis of 2,3-Unsaturated 1,6-Oligosaccharides by Means of a Glycal-Derived Allyl Epoxide and N-Nosyl Aziridine. [作者：Di Bussolo, Valeria;Checchia, Lorenzo;Romano, Maria Rosaria;Pineschi, Mauro;Crotti, Paolo;,期刊：Organic Letters, 页码：2493-2496 , 文章类型： 研究论文，,卷期：2008年10-12] b-D-Threo- and 4-deoxy-4-amino-a-D-erythro-hex-2-enopyranosyl di- and trisaccharides with free hydroxy or amine functional groups were synthesized by means of a reiterative, completely stereoselective glycosylation proce... Chemical Synthesis of Cyclic Galactooligofuranosides Isolated from Enzymatic Degradation Products of Cell Wall Arabinogalactan of Mycobacterium tuberculosis. [作者：Kim, Kwan Soo;Lee, Bo-Young;Yoon, Sung Ho;Jeon, Hyo Jin;Baek, Ju Yuel;Jeong, Kyu-Sung;,期刊：Organic Letters, 页码：2373-2376 , 文章类型： 研究论文，,卷期：2008年10-12] Synthesis of cyclic tetra-, hexa- and octasaccharides contg. alternating (1?)-b- and (1?)-b-galactofuranosyl linkages has been achieved by intramol. cycloglycosylation of corresponding linear sugars and by cyclooligomeri...