- Direct Catalytic Asymmetric Mannich-Type Reaction of b-Keto Phosphonate Using a Dinuclear Ni2-Schiff Base Complex.
[作者:Chen, Zhihua;Yakura, Kenichiro;Matsunaga, Shigeki;Shibasaki, Masakatsu;,期刊:Organic Letters, 页码:3239-3242 , 文章类型: 研究论文,,卷期:2008年10-15]
- Direct catalytic asym. Mannich-type reactions of b-keto phosphonates are described. A homodinuclear Ni2-Schiff base complex promoted the reaction at 0? giving b-amino phosphonates in up to 90% yield, 20:1 dr, and 99% ee...
- Synthesis of 3-Selena-1-dethiacephems and Selenazepines via Iodocyclization.
[作者:Garud, Dinesh R.;Koketsu, Mamoru;,期刊:Organic Letters, 页码:3319-3322 , 文章类型: 研究论文,,卷期:2008年10-15]
- A convenient approach to synthesize novel selenium-b-lactams, e.g. I (R = Ph, 4-ClC6H4, 2-naphthyl, etc., R1 = CH2CYCH, CH:C:CH2), 3-selena-1-dethiacephems, e.g. II and III, and selenazepines, e.g. IV (R = Me, Et, 1-pent...
- Preparation of Aryloxetanes and Arylazetidines by Use of an Alkyl-Aryl Suzuki Coupling.
[作者:Duncton, Matthew A. J.;Estiarte, M. Angels;Tan, Darlene;Kaub, Carl;O'Mahony, Donogh J. R.;Johnson, Russell J.;Cox, Matthew;Edwards, William T.;Wan, Min;Kincaid, John;Kelly, Michael G.;,期刊:Organic Letters, 页码:3259-3262 , 文章类型: 研究论文,,卷期:2008年10-15]
- The oxetan-3-yl and azetidin-3-yl substituents have previously been identified as privileged motifs within medicinal chem. An efficient approach to installing these two modules into arom. systems, using a nickel-mediate...
- Chuktabrins A and B, Two Novel Limonoids from the Twigs and Leaves of Chukrasia tabularis.
[作者:Zhang, Chuan-Rui;Fan, Cheng-Qi;Zhang, Li;Yang, Sheng-Ping;Wu, Yan;Lu, Yang;Yue, Jian-Min;,期刊:Organic Letters, 页码:3183-3186 , 文章类型: 研究论文,,卷期:2008年10-15]
- Two novel limonoids, chuktabrin A (1,I), featuring the unique motifs of a 1,3-dioxolan-2-one and a 3,4-dihydro-2H-pyran, and chuktabrin B (2), possessing an unprecedented polycyclic skeleton, were isolated from Chukrasia...
- Synthesis and photophysical investigation of squaraine rotaxanes by "Clicked Capping".
[作者:Gassensmith, Jeremiah J.;Barr, Lorna;Baumes, Jeffrey M.;Paek, Agelina;Nguyen, Anh;Smith, Bradley D.;,期刊:Organic Letters, 页码:3343-3346 , 文章类型: 研究论文,,卷期:2008年10-15]
- Photochemistry, and Photographic and Other Reprographic Pseudorotaxane complexes of squaraine dyes and tetralactam macrocycles are converted into permanently interlocked rotaxane structures (I and II, I and III resp. int...
- Kinetic Resolution of Racemic Carboxylic Acids by an L-Histidine-Derived Sulfonamide-Induced Enantioselective Esterification Reaction.
[作者:Ishihara, Kazuaki;Kosugi, Yuji;Umemura, Shuhei;Sakakura, Akira;,期刊:Organic Letters, 页码:3191-3194 , 文章类型: 研究论文,,卷期:2008年10-15]
- The direct and catalytic kinetic resoln. of racemic carboxylic acids bearing a Bronsted base such as O-protected a-hydroxy carboxylic acids R1OCHR2CO2H (R1 = pyrrolidin-1-ylcarbonyl; R2 = Me2CH, Ph, PhCH2, Me3CSiPh2) and...
- A Regio- and Stereocontrolled Approach to Pyranosyl C-Nucleoside Synthesis.
[作者:Redpath, Philip;Macdonald, Simon;Migaud, Marie E.;,期刊:Organic Letters, 页码:3323-3326 , 文章类型: 研究论文,,卷期:2008年10-15]
- synthesized from nonchiral starting materials, using the ene/intramol. Sakurai cyclization reaction demonstrating a simple, general, and stereocontrolled approach to pyranosyl C-nucleosides.
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