- 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. ...
- 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 (+)- 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...
- 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...
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