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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53条记录   Gas-Phase Reactivity of Aromatic s,s-Biradicals toward Dinucleoside Phosphates. [作者：Yang, Linan;Nash, John J.;Yurkovich, Michael J.;Jin, Zhicheng;Vinueza, Nelson R.;Kenttaemaa, Hilkka I.;,期刊：Organic Letters, 页码：1889-1892 , 文章类型： 研究论文，,卷期：2008年10-10] In order to improve the understanding of the interactions of arom. s,s-biradicals with DNA, the reactivity of three isomeric s,s-biradicals toward four dinucleoside phosphates was studied in a mass spectrometer. The din... Control of the photoreactivity of diarylethene derivatives by quaternarization of the pyridylethynyl group. [作者：Yumoto, Koji;Irie, Masahiro;Matsuda, Kenji;,期刊：Organic Letters, 页码：2051-2054 , 文章类型： 研究论文，,卷期：2008年10-10] Photochromic behavior of diarylethene derivs. with (4-pyridyl)ethynyl group directly attached to the 6-p hexatriene moieties of the diarylethenes was investigated. Upon quaternization of the pyridine moieties, the photo... Semisynthesis of dimeric proteins by expressed protein ligation. [作者：Ziaco, Barbara;Pensato, Soccorsa;D'Andrea, Luca D.;Benedetti, Ettore;Romanelli, Alessandra;,期刊：Organic Letters, 页码：1955-1958 , 文章类型： 研究论文，,卷期：2008年10-10] A one-pot synthesis of homodimeric proteins is described. The synthetic strategy is based on a double expressed protein ligation reaction between thioester peptides and a new bis-cysteinyl linker. The protocol was also... Introduction of Functional Groups into Peptides via N-Alkylation. [作者：Demmer, O.;Dijkgraaf, I.;Schottelius, M.;Wester, H.-J.;Kessler, H.;,期刊：Organic Letters, 页码：2015-2018 , 文章类型： 研究论文，,卷期：2008年10-10] An optimized protocol for the mild and selective Fukuyama-Mitsunobu reaction was used for mono- and di-N-alkylation on solid support. Thereby, nonfunctionalized aliph. and arom. residues are quickly introduced into trans... Increasing the Persistency of Stable Free-Radicals: Synthesis and Characterization of a Nitroxide Based [1]Rotaxane. [作者：Franchi, Paola;Fani, Michela;Mezzina, Elisabetta;Lucarini, Marco;,期刊：Organic Letters, 页码：1901-1904 , 文章类型： 研究论文，,卷期：2008年10-10] A persistent paramagnetic [1]rotaxane based on b-cyclodextrin showing an increased persistency under reductive conditions has been prepd. and characterized for the first time. Molecular Fibers and Wires in Solid-State and Solution Self-Assemblies of Cyclodextrin [2]Rotaxanes. [作者：Maniam, Subashani;Cieslinski, Marta M.;Lincoln, Stephen F.;Onagi, Hideki;Steel, Peter J.;Willis, Anthony C.;Easton, Christopher J.;,期刊：Organic Letters, 页码：1885-1888 , 文章类型： 研究论文，,卷期：2008年10-10] Cyclodextrin [2]rotaxanes have been prepd. by coupling dimethylanilines with dicarboxylic acids using DMT-MM, in aq. solns. of a-cyclodextrin. The example illustrated shows unusual fluorescence emission and other spectr... Total Synthesis of (?-Murrayazoline. [作者：Ueno, Akiko;Kitawaki, Takafumi;Chida, Noritaka;,期刊：Organic Letters, 页码：1999-2002 , 文章类型： 研究论文，,卷期：2008年10-10] The total synthesis of (?-murrayazoline (I) is described. The characteristic hexa-heterocyclic structure of I was constructed by a combination of the intramol. Friedel-Crafts-type Michael addn. and Pd-catalyzed C-O coup... Gassman's Intramolecular [2 + 2] Cationic Cycloaddition. Formal Total Syntheses of Raikovenal and epi-Raikovenal. [作者：Ko, Changhong;Feltenberger, John B.;Ghosh, Sunil K.;Hsung, Richard P.;,期刊：Organic Letters, 页码：1971-1974 , 文章类型： 研究论文，,卷期：2008年10-10] The first intramol. version of Gassman's cationic [2 + 2] cycloaddn. employing vinyl acetals tethered to an unactivated olefin and its application in the formal syntheses of raikovenal and epi-raikovenal are described. ... Cipadonoid A, a Novel Limonoid with an Unprecedented Skeleton, from Cipadessa cinerascens. [作者：Fang, Xin;Di, Ying-Tong;He, Hong-Ping;Liu, Hai-Yang;Zhang, Zhen;Ren, Yan-Li;Gao, Zhu-Lin;Gao, Suo;Hao, Xiao-Jiang;,期刊：Organic Letters, 页码：1905-1908 , 文章类型： 研究论文，,卷期：2008年10-10] Cipadonoid A (I), a novel limonoid with an unprecedented skeleton, was isolated from the leaves of Cipadessa cinerascens. Its structure and relative configuration were detd. by spectroscopic anal. and computer modeling.... Solid-Phase Synthesis of Azidomethylene Inhibitors Targeting Cysteine Proteases. [作者：Yang, Peng-Yu;Wu, Hao;Lee, Mei Yin;Xu, Ashley;Srinivasan, Rajavel;Yao, Shao Q.;,期刊：Organic Letters, 页码：1881-1884 , 文章类型： 研究论文，,卷期：2008年10-10] An efficient strategy for the solid-phase synthesis of azidomethylene inhibitors targeting cysteine proteases is described. The method is highlighted by its compatibility with readily available building blocks, as well ... Regio- and Stereoselective Synthesis of Alkyl Allylic Ethers via Gold(I)-Catalyzed Intermolecular Hydroalkoxylation of Allenes with Alcohols. [作者：Zhang, Zhibin;Widenhoefer, Ross A.;,期刊：Organic Letters, 页码：2079-2081 , 文章类型： 研究论文，,卷期：2008年10-10] Reaction of 1-phenyl-1,2-butadiene with 2-phenyl-1-ethanol catalyzed by a 1:1 mixt. of a gold(I) N-heterocyclic carbene complex and AgOTf at room temp. for 1 h led to isolation of (E)-(3-phenethoxy-1-butenyl)benzene in 9... Testing the Validity of the Conventional Resonance Model for Protonated Carbonyl, Imine and Thiocarbonyl Compounds. An Ab Initio Valence Bond Study. [作者：Braida, Benoit;Bundhoo, Dilshaad;Engels, Bernd;Hiberty, Philippe C.;,期刊：Organic Letters, 页码：1951-1954 , 文章类型： 研究论文，,卷期：2008年10-10] The conventional resonance model describes protonated carbonyls, imines, and thiocarbonyls by a superposition of two structures, one p polar-covalent and the other of carbenium type. The validity of this model is clearl... Copper-Catalyzed Synthesis of Esters from Ketones. Alkyl Group as a Leaving Group. [作者：Nakatani, Yuji;Koizumi, Yuichiro;Yamasaki, Ryu;Saito, Shinichi;,期刊：Organic Letters, 页码：2067-2070 , 文章类型： 研究论文，,卷期：2008年10-10] The conversion of ketones to esters has been achieved through the use of Cu catalyst and tetrabutylammonium nitrite. This reaction involves the activation of the less activated C-C bond, and the alkyl group is removed a... Silicon-Induced Ene-Type Reaction in the Thermal Conversion of Enolates to b-Silyl Enones with Molecular Dioxygen. [作者：Hwu, Jih Ru;Chen, Chien Hsien;Hsu, Chuan-I.;Das, Asish R.;Li, Yen Cheng;Lin, Lung Ching;,期刊：Organic Letters, 页码：1913-1916 , 文章类型： 研究论文，,卷期：2008年10-10] Reaction of alkyl, acetoxy, and silyl enol ethers of 3-(organosilyl)cyclohexanone with mol. dioxygen in toluene at 110? produced the corresponding conjugated enones in yields up to 88% yield. The reaction of the same ty... Enantioselective Synthesis of Cyclic Sulfamidates via Pd-Catalyzed Hydrogenation. [作者：Wang, You-Qing;Yu, Chang-Bin;Wang, Da-Wei;Wang, Xiao-Bing;Zhou, Yong-Gui;,期刊：Organic Letters, 页码：2071-2074 , 文章类型： 研究论文，,卷期：2008年10-10] Using Pd(CF3CO2)2/(S,S)-f-binaphane as the catalyst, an efficient enantioselective synthesis of cyclic sulfamidates, e.g., I, was developed via asym. hydrogenation of the corresponding cyclic imines in 2,2,2-trifluoroeth... Cu2+-Induced Intermolecular Static Excimer Formation of Pyrenealkylamine. [作者：Kim, Hyun Jung;Hong, Jooyeon;Hong, Areum;Ham, Sihyun;Lee, Joung Hae;Kim, Jong Seung;,期刊：Organic Letters, 页码：1963-1966 , 文章类型： 研究论文，,卷期：2008年10-10] Synthesis of monopyrenylalkylamine deriv. 1 and its fluorescence behavior for Cu2+ in H2O/MeCN (1:1, vol./vol.) were studied. Upon Cu2+ binding, 1, bearing a sulfonamide group, exhibited a marked excimer emission at 455...