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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   Synthesis and Characterization of Near-Infrared Absorbing and Fluorescent Liquid-Crystal Chromophores. [作者：Li, Xianzhen;Liu, Anhua;Xun, Shidi;Qiao, Wenqiang;Wan, Xinhua;Wang, Zhi Yuan;,期刊：Organic Letters, 页码：3785-3787 , 文章类型： 研究论文，,卷期：2008年10-17] The donor-acceptor-donor charge-transfer chromophores can be tailor-made to be near-IR absorbing and fluorescent, as well as being liq. crystals. The chromophore contg. an extremely strong acceptor of benzo[1,2-c:4,5-c'... Solid-phase synthesis of a cyclodepsipeptide: Cotransin. [作者：Coin, Irene;Beerbaum, Monika;Schmieder, Peter;Bienert, Michael;Beyermann, Michael;,期刊：Organic Letters, 页码：3857-3860 , 文章类型： 研究论文，,卷期：2008年10-17] The first solid-phase synthesis of cotransin, a cyclic depsipeptide having high pharmacol. potential, was achieved, by a proper choice of coupling reagents and use of either TBAF or DBU for Fmoc (Fmoc = 9-flurenylmethylo... Chiral NHC-Catalyzed Oxodiene Diels-Alder Reactions with a-Chloroaldehyde Bisulfite Salts. [作者：He, Ming;Beahm, Brendan J.;Bode, Jeffrey W.;,期刊：Organic Letters, 页码：3817-3820 , 文章类型： 研究论文，,卷期：2008年10-17] a-Chloroaldehyde bisulfite adducts were successfully employed in chiral NHC-catalyzed hetero-Diels-Alder reactions with various oxodienes under biphasic reaction conditions with high levels of enantioselectivity. This n... Organocatalytic Asymmetric Synthesis of 5-(Trialkylsilyl)cyclohex-2-enones and the Transformation into Useful Building Blocks. [作者：Bolze, Patrick;Dickmeiss, Gustav;Joergensen, Karl Anker;,期刊：Organic Letters, 页码：3753-3756 , 文章类型： 研究论文，,卷期：2008年10-17] A simple organocatalytic approach to highly attractive chiral building blocks is presented. By the reaction of b-ketoesters with a,b-unsatd. aldehydes using a chiral TMS-protected prolinol as the catalyst, optically act... Recognition of guests by water-stabilized cavitand hosts. [作者：Lledo, Agusti;Hooley, Richard J.;Rebek, Julius, Jr.;,期刊：Organic Letters, 页码：3669-3671 , 文章类型： 研究论文，,卷期：2008年10-17] Water stabilized, deep cavitands with three walls and an open side are shown to be receptors for amines and ammonium cations bearing bulky aliph. groups. The missing wall allows the binding of guests not accommodated by... Origin of stereoselectivity in the reduction of a planar oxacarbenium. [作者：Um, Joann M.;Houk, K. N.;Phillips, Andrew J.;,期刊：Organic Letters, 页码：3769-3772 , 文章类型： 研究论文，,卷期：2008年10-17] The Kishi redn. of a planar oxacarbenium was investigated theor. The high diastereoselectivity for hydride transfer to the oxacarbenium intermediate is attributed to the conformation of the transition state that places ... Bipleiophylline, an Unprecedented Cytotoxic Bisindole Alkaloid Constituted from the Bridging of Two Indole Moieties by an Aromatic Spacer Unit. [作者：Kam, Toh-Seok;Tan, Shin-Jowl;Ng, Seik-Weng;Komiyama, Kanki;,期刊：Organic Letters, 页码：3749-3752 , 文章类型： 研究论文，,卷期：2008年10-17] A cytotoxic bisindole alkaloid, bipleiophylline (I), possessing an unprecedented structure in which two indole moieties are bridged by an arom. spacer unit has been isolated from Alstonia angustifolia. The structure was... Catalytic Enantioselective Addition of Diethylzinc to Trifluoromethyl Ketones. [作者：Yearick, Kimberly;Wolf, Christian;,期刊：Organic Letters, 页码：3915-3918 , 文章类型： 研究论文，,卷期：2008年10-17] A procedure for nucleophilic addn. of diethylzinc to trifluoromethyl ketones was developed. The TMEDA-catalyzed method converts arom. substrates to the corresponding 2-aryl-1,1,1-trifluorobutan-2-ols in up to 99% yield,... General and Practical Conversion of Aldehydes to Homologated Carboxylic Acids. [作者：Cafiero, Lauren R.;Snowden, Timothy S.;,期刊：Organic Letters, 页码：3853-3856 , 文章类型： 研究论文，,卷期：2008年10-17] The reaction of aldehydes with trichloromethide followed by sodium borohydride or sodium phenylseleno(triethyl)borate under basic conditions affords homologated carboxylic acids in high yields. This operationally simple... A Light-Gated Synthetic Ion Channel. [作者：Jog, Parag V.;Gin, Mary S.;,期刊：Organic Letters, 页码：3693-3696 , 文章类型： 研究论文，,卷期：2008年10-17] A gated synthetic ion channel with b-cyclodextrin as the pore and azobenzene as the gate is reported. Irradn. converts a tethered trans-azobenzene to cis-azobenzene which likely transforms the channel from a self-inclus... Chromofluorescent Indicator for Intracellular Zn2+/Hg2+ Dynamic Exchange. [作者：Lee, Jeong Won;Jung, Hyo Sung;Kwon, Pil Seung;Kim, Jong Wan;Bartsch, Richard A.;Kim, Youngmee;Kim, Sung-Jin;Kim, Jong Seung;,期刊：Organic Letters, 页码：3801-3804 , 文章类型： 研究论文，,卷期：2008年10-17] The fluorescence of NABQ increases remarkably in the presence of Zn2+ and is quenched by Hg2+. As shown by confocal imaging, NABQ-Zn2+ can penetrate cells, where the bound Zn2+ is exchanged for Hg2+. This results in th... Design of a Semirigid Molecule as a Selective Fluorescent Chemosensor for Recognition of Cd(II). [作者：Tang, Xiao-Liang;Peng, Xiao-Hong;Dou, Wei;Mao, Jie;Zheng, Jiang-Rong;Qin, Wen-Wu;Liu, Wei-Sheng;Chang, Jin;Yao, Xiao-Jun;,期刊：Organic Letters, 页码：3653-3656 , 文章类型： 研究论文，,卷期：2008年10-17] A new 8-hydroxyquinoline-based chemosensor possessing a semirigid structure was designed, and its fluorescent sensing behavior toward metal ions was studied. A prominent fluorescence enhancement only for Cd2+ was found ... Wavelength-Dependent Reactivity of a Quinolinone: Toward a Photochromic Three-State System. [作者：Berthet, Jerocme;Micheau, Jean-Claude;Lokshin, Vladimir;Vales, Magali;Vermeersch, Gaston;Delbaere, Stephanie;,期刊：Organic Letters, 页码：3773-3776 , 文章类型： 研究论文，,卷期：2008年10-17] Photochemistry, and Photographic and Other Reprographic The photochem. reactivity of the quinolinone was investigated using NMR by monitoring its reactions under appropriate irradn. wavelengths. Besides the irreversible ... Enantioselective Total Synthesis of (+)-Largazole, a Potent Inhibitor of Histone Deacetylase. [作者：Ghosh, Arun K.;Kulkarni, Sarang;,期刊：Organic Letters, 页码：3907-3909 , 文章类型： 研究论文，,卷期：2008年10-17] An enantioselective total synthesis of the cytotoxic natural product (+)-largazole (I) is described. It is a potent histone deacetylase inhibitor. The synthesis is convergent and involves the coupling of the free carbo... Triazole-Linked Analogue of Deoxyribonucleic Acid (TLDNA): Design, Synthesis, and Double-Strand Formation with Natural DNA. [作者：Isobe, Hiroyuki;Fujino, Tomoko;Yamazaki, Naomi;Guillot-Nieckowski, Marine;Nakamura, Eiichi;,期刊：Organic Letters, 页码：3729-3732 , 文章类型： 研究论文，,卷期：2008年10-17] synthesized using click chem. The chain elongation reaction using copper-catalyzed Huisgen cycloaddn. was successful and gave the artificial oligonucleotide that formed a stable double strand with the complementary stra... Cu2O-Catalyzed Tandem Ring-Opening/Coupling Cyclization Process for the Synthesis of 2,3-Dihydro-1,4-benzodioxins. [作者：Bao, Weiliang;Liu, Yunyun;Lv, Xin;Qian, Weixing;,期刊：Organic Letters, 页码：3899-3902 , 文章类型： 研究论文，,卷期：2008年10-17] 2, 3-Dihydro-1, 4-benzodioxins, e.g. I, can be prepd. in a tandem one-pot procedure by reaction of o-iodophenols with epoxides catalyzed by Cu2O/1, 10-phenanthroline/Cs2CO3 system. The reaction is suggested to occur via...