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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60条记录   Photovoltaic Performance of an Ultrasmall Band Gap Polymer. [作者：Zoombelt, Arjan P.;Fonrodona, Marta;Wienk, Martijn M.;Sieval, Alexander B.;Hummelen, Jan C.;Janssen, Rene A. J.;,期刊：Organic Letters, 页码：903-906 , 文章类型： 研究论文，,卷期：2009年11-4] A conjugated polymer, PBTTQ, that consists of alternating electron-rich bithiophene and electron-deficient thiadiazoloquinoxaline units was synthesized via Yamamoto polymn. with Ni(cod)2 - it has a band gap of 0.94 eV. ... a-Glycosphingolipids via Chelation-Induced Anomerization of O- and S-Glucuronic and Galacturonic Acid Derivatives. [作者：Pilgrim, Wayne;Murphy, Paul V.;,期刊：Organic Letters, 页码：939-942 , 文章类型： 研究论文，,卷期：2009年11-4] response to Gram-neg. bacteria. Synthesis of closely related compds., including a novel a-SO2 glycolipid mimetic, is described from carbohydrate precursors where anomerization is a key step. Very high stereoselectiviti... Total Synthesis of Apoptolidin A. [作者：Crimmins, Michael T.;Christie, Hamish S.;Long, Alan;Chaudhary, Kleem;,期刊：Organic Letters, 页码：831-834 , 文章类型： 研究论文，,卷期：2009年11-4] A highly convergent, enantioselective total synthesis of the potent antitumor agent apoptolidin A has been completed. The key transformations include highly selective glycosylations to attach the C27 disaccharide and th... Synthesis of a Novel Polyhydroxylated Salicylic Acid Lactone Framework. [作者：Rountree, J. S. Shane;Murphy, Paul V.;,期刊：Organic Letters, 页码：871-874 , 文章类型： 研究论文，,卷期：2009年11-4] The facile prepn. of a novel 8-membered polyhydroxylated salicylic acid lactone I from 2,6-dihydroxybenzoic acid and sodium thio-D-glucose is described. The key step involved a sodium hydride promoted intramol. lactoniz... Synthesis of (+)- and (-)-Monanchorin. [作者：Yu, Min;Snider, Barry B.;,期刊：Organic Letters, 页码：1031-1032 , 文章类型： 研究论文，,卷期：2009年11-4] azide, and reaction of the amine with MeSC(NBoc)NHBoc, AgNO3, and Et3N. Treatment of the protected guanidino alc. with 9:1 CDCl3/TFA afforded monanchorin III, whose abs. stereochem. was assigned as shown. Star-Shaped D-p-A Conjugated Molecules: Synthesis and Broad Absorption Bands. [作者：Wang, Jin-Liang;Tang, Zheng-Ming;Xiao, Qi;Ma, Yuguo;Pei, Jian;,期刊：Organic Letters, 页码：863-866 , 文章类型： 研究论文，,卷期：2009年11-4] Two donor-acceptor hybrid star-shaped D-p-A mols. with truxene core contg. thienylethylene, triphenylamino and benzothiadiazole units were facilely developed. The absorption spectra of these compds., which almost covere... A modular synthesis of highly substituted imidazolium salts. [作者：Hirano, Keiichi;Urban, Slawomir;Wang, Congyang;Glorius, Frank;,期刊：Organic Letters, 页码：1019-1022 , 文章类型： 研究论文，,卷期：2009年11-4] A versatile and modular one-pot method for the prepn. of differently substituted sym. and unsym. imidazolium salts is reported, and 19 examples are given. In the key step, readily available formamidines and a-halo keton... PIFA-Mediated Oxidative Cyclization of 1-Carbamoyl-1-oximylcycloalkanes: Synthesis of Spiro-Fused Pyrazolin-5-one N-Oxides. [作者：Wang, Kewei;Fu, Xiaolan;Liu, Jinying;Liang, Yongjiu;Dong, Dewen;,期刊：Organic Letters, 页码：1015-1018 , 文章类型： 研究论文，,卷期：2009年11-4] A convenient and efficient synthesis of spiro-fused pyrazolin-5-one N-oxides, e.g., I, starting from readily available 1-carbamoyl-1-oximylcycloalkanes, e.g., II, is developed. This general protocol features a novel and... Weak Bronsted Acid-Thiourea Co-catalysis: Enantioselective, Catalytic Protio-Pictet-Spengler Reactions. [作者：Klausen, Rebekka S.;Jacobsen, Eric N.;,期刊：Organic Letters, 页码：887-890 , 文章类型： 研究论文，,卷期：2009年11-4] The development of one-pot imine formation and asym. Pictet-Spengler reactions co-catalyzed by a chiral thiourea and benzoic acid is described. Optically active tetrahydro-b-carbolines,, e.g. I, ubiquitous structural mo... Asymmetric Synthesis of Tetrahydroquinolin-3-ols via CoCl2-Catalyzed Reductive Cyclization of Nitro Cyclic Sulfites with NaBH4. [作者：Jagdale, Arun R.;Reddy, R. Santhosh;Sudalai, Arumugam;,期刊：Organic Letters, 页码：803-806 , 文章类型： 研究论文，,卷期：2009年11-4] Nonracemic 3-hydroxy-1,2,3,4-tetrahydroquinolines such as I (R = H, MeO, PhCH2O, BuCH2O; R1 = H, MeO, PhCH2O; RR1 = OCH2O) are prepd. chemoselectively by redn. of nitrophenyl cyclic sulfites such as nonracemic II (R = H,... A Fluorous-Tagged "Safety Catch" Linker for Preparing Heterocycles by Ring-Closing Metathesis. [作者：O'Leary-Steele, Catherine;Cordier, Christopher;Hayes, Jerome;Warriner, Stuart;Nelson, Adam;,期刊：Organic Letters, 页码：915-918 , 文章类型： 研究论文，,卷期：2009年11-4] A fluorous-tagged "safety catch" linker is described for the synthesis of heterocycles with use of ring-closing metathesis. The linker facilitates the purifn. of metathesis substrates, the removal of the catalyst, the f... Catalytic formal homo-Nazarov cyclization. [作者：De Simone, Filippo;Andres, Julien;Torosantucci, Riccardo;Waser, Jerome;,期刊：Organic Letters, 页码：1023-1026 , 文章类型： 研究论文，,卷期：2009年11-4] The first catalytic method for the cyclization of vinyl-cyclopropyl ketones (formal homo-Nazarov reaction) is reported. Starting from activated cyclopropanes, heterocyclic, and carbocyclic compds. were obtained under mi... Indolynes as electrophilic indole surrogates: fundamental reactivity and synthetic applications. [作者：Bronner, Sarah M.;Bahnck, Kevin B.;Garg, Neil K.;,期刊：Organic Letters, 页码：1007-1010 , 文章类型： 研究论文，,卷期：2009年11-4] A mild method to access a variety of substituted indole derivs. has been developed. The strategy relies on the generation of highly reactive indolyne intermediates, which function as electrophilic indole surrogates. Studies Toward the Synthesis of Spirolides: Assembly of the Elaborated E-Ring Fragment. [作者：Stivala, Craig E.;Zakarian, Armen;,期刊：Organic Letters, 页码：839-842 , 文章类型： 研究论文，,卷期：2009年11-4] A stereoselective synthesis of the spiroimine fragment of spirolide C is described by prepg. the advanced intermediate I. The congested C7 and C29 tertiary and quaternary centers are constructed by a diastereoselective ... A Convergent Approach toward the C1-C11 Subunit of Phoslactomycins and Formal Synthesis of Phoslactomycin B. [作者：Druais, Valerie;Hall, Michael J.;Corsi, Camilla;Wendeborn, Sebastian V.;Meyer, Christophe;Cossy, Janine;,期刊：Organic Letters, 页码：935-938 , 文章类型： 研究论文，,卷期：2009年11-4] The prepn. of the C1-C11 subunit I of phoslactomycins, and a formal synthesis of phoslactomycin B, were achieved by a convergent strategy involving the chelation-controlled addn. of an alkynyl Grignard reagent to an a-al... Synthesis, Photophysical, and Device Properties of Novel Dendrimers Based on a Fluorene-Hexabenzocoronene (FHBC) Core. [作者：Wong, Wallace W. H.;Jones, David J.;Yan, Chao;Watkins, Scott E.;King, Simon;Haque, Saif A.;Wen, Xiaoming;Ghiggino, Kenneth P.;Holmes, Andrew B.;,期刊：Organic Letters, 页码：975-978 , 文章类型： 研究论文，,卷期：2009年11-4] The synthesis of easily functionalized and highly sol. fluorene-contg. hexabenzocoronenes (FHBC) has been achieved in high yield at a gram scale. Conjugated triarylamine oligomers were coupled to the FHBC cores via Buch...