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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65条记录   Asymmetric Synthesis of Tetracyclic Benzo[a]quinolizidine Targets. [作者：Allin, Steven M.;Gaskell, Sean N.;Elsegood, Mark R. J.;Martin, William P.;,期刊：Journal of Organic Chemistry, 页码：6448-6451 , 文章类型： 研究论文，,卷期：2008年73-16] A novel, facile, and asym. approach for the synthesis of polycyclic benzo[a]quinolizidine targets is reported. In the prepn. of more functionalized derivs., the generation of the iminium ether salt intermediate I, forme... On the two-ligand catalytic asymmetric deprotonation of N-Boc pyrrolidine: probing the effect of the stoichiometric ligand. [作者：Bilke, Julia L.;O'Brien, Peter;,期刊：Journal of Organic Chemistry, 页码：6452-6454 , 文章类型： 研究论文，,卷期：2008年73-16] To map out the stoichiometric ligand requirements in the two-ligand catalytic asym. deprotonation of N-Boc pyrrolidine, 24 different ligands have been evaluated; the highest enantioselectivity (90:10 er) was obtained by ... An efficient preparation of b-aryl-b-ketophosphonates by the TFAA/H3PO4-mediated acylation of arenes with phosphonoacetic acids. [作者：Luke, George P.;Seekamp, Christopher K.;Wang, Zhe-Qing;Chenard, Bertrand L.;,期刊：Journal of Organic Chemistry, 页码：6397-6400 , 文章类型： 研究论文，,卷期：2008年73-16] Electron-rich arenes undergo acylation by phosphonoacetic acids mediated by trifluoroacetic anhydride/85% H3PO4, giving b-aryl-b-ketophosphonates substituted in para-position to the electron-donating alkoxy-group; the re... Coupling Reactions of Bromoalkynes with Imidazoles Mediated by Copper Salts: Synthesis of Novel N-Alkynylimidazoles. [作者：Laroche, Christophe;Li, Jing;Freyer, Matthew W.;Kerwin, Sean M.;,期刊：Journal of Organic Chemistry, 页码：6462-6465 , 文章类型： 研究论文，,卷期：2008年73-16] A cross-coupling reaction of imidazoles with bromoalkynes in the presence of a catalytic amt. of CuI is reported. This protocol allows an access to novel N-(1-alkynyl)imidazoles in moderate to good yields. General and Efficient Copper-Catalyzed Amidation of Saturated C-H Bonds Using N-Halosuccinimides as the Oxidants. [作者：Liu, Xiaowei;Zhang, Yongming;Wang, Long;Fu, Hua;Jiang, Yuyang;Zhao, Yufen;,期刊：Journal of Organic Chemistry, 页码：6207-6212 , 文章类型： 研究论文，,卷期：2008年73-16] We have developed a general and efficient method for copper-catalyzed amidation of satd. C-H bonds under mild conditions, and suitable substrates include benzylic reagents, N,N-dimethylaniline derivs., free carboxamides,... Stereoselective Synthesis of 3-Alkyl-2-aryltetrahydrofuran-4-ols: Total Synthesis of (?-Paulownin. [作者：Angle, Steven R.;Choi, Inchang;Tham, Fook S.;,期刊：Journal of Organic Chemistry, 页码：6268-6278 , 文章类型： 研究论文，,卷期：2008年73-16] A formal [3 + 2]-cycloaddn. involving the Lewis acid mediated reaction of a-silyloxy aldehydes and styrenes to afford 3-alkyl-2-aryltetrahydrofuran-4-ols has been developed. This methodol. was applied to the total synth... Probing the Importance of the Hemilabile Site of Bis(phosphine) Monoxide Ligands in the Copper-Catalyzed Addition of Diethylzinc to N-Phosphinoylimines: Discovery of New Effective Chiral Ligands. [作者：Bonnaventure, Isabelle;Charette, Andre B.;,期刊：Journal of Organic Chemistry, 页码：6330-6340 , 文章类型： 研究论文，,卷期：2008年73-16] The hemilabile ligand 1-((2R,5R)-2,5-dimethyl-1-oxophospholan-1-yl)-2-((2R,5R)-2,5-dimethyl phospholan-1-yl)benzene has proven to be a successful ligand for the Cu-catalyzed addn. of diethylzinc to N-phosphinoylimines. ... Novel Synthesis of Cinnolines and 1-Aminoindolines via Cu-Catalyzed Intramolecular N-Arylation of Hydrazines and Hydrazones Prepared from 3-Haloaryl-3-hydroxy-2-diazopropanoates. [作者：Hasegawa, Kazuya;Kimura, Naoki;Arai, Shigeru;Nishida, Atsushi;,期刊：Journal of Organic Chemistry, 页码：6363-6368 , 文章类型： 研究论文，,卷期：2008年73-16] A new and facile access to cinnolines, e.g., I (R1 = R2 = H, OMe), dihydrocinnolines, and 1-aminoindolines was established by use of diazo functionalities. The hydrazines and hydrazones as cyclization precursors derived... Sequential Removal of Photolabile Protecting Groups for Carbonyls with Controlled Wavelength. [作者：Wang, Pengfei;Wang, Yun;Hu, Huayou;Spencer, Cierra;Liang, Xing;Pan, Lurong;,期刊：Journal of Organic Chemistry, 页码：6152-6157 , 文章类型： 研究论文，,卷期：2008年73-16] A group of robust and easy-to-make photolabile protecting groups (PPGs) for acetal/ketal protection of aldehydes and ketones has been developed. Sequential removal of different PPGs is achieved via control of irradn. wa... 2-Pyridylnitrene from Tetrazolo[1,5-a]pyridine and Pyrido[2,3-a][1,2,4]oxadiazol-2-one. [作者：McCluskey, Adam;Wentrup, Curt;,期刊：Journal of Organic Chemistry, 页码：6265-6267 , 文章类型： 研究论文，,卷期：2008年73-16] Flash vacuum thermolyses of tetrazolo[1,5-a]pyridine and pyrido[2,3-a][1,2,4]oxadiazol-2-one generate 2-pyridylnitrene, which was detected by Ar matrix ESR spectroscopy. The thermolysis products are 2-aminopyridine, Z- ... Synthesis of Substituted N-Benzyl Pyridones via an O- to N-Alkyl Migration. [作者：Lanni, Erica L.;Bosscher, Michael A.;Ooms, Bartel D.;Shandro, Christina A.;Ellsworth, Bruce A.;Anderson, Carolyn E.;,期刊：Journal of Organic Chemistry, 页码：6425-6428 , 文章类型： 研究论文，,卷期：2008年73-16] A new LiI-promoted O- to N-alkyl migration has been developed for the conversion of O-alkylated 2-hydroxy pyridines, quinolines, and pyrimidines to the corresponding N-alkylated heterocycles in good to excellent yields (... Organocatalytic asymmetric addition of alcohols and thiols to activated electrophiles: Efficient dynamic kinetic resolution and desymmetrization protocols. [作者：Peschiulli, Aldo;Quigley, Cormac;Tallon, Sean;Gun'ko, Yuri K.;Connon, Stephen J.;,期刊：Journal of Organic Chemistry, 页码：6409-6412 , 文章类型： 研究论文，,卷期：2008年73-16] Bifunctional urea-based cinchona alkaloid derivs. have been shown to promote highly efficient DKR reactions of azlactones using an alc. nucleophile. The optimum catalyst is remarkably insensitive to the steric bulk of t... Microwave-Enhanced Ionothermal CuAAC for the Synthesis of Glycoclusters on a Calix[4]arene Platform. [作者：Vecchi, Alessandra;Melai, Bernardo;Marra, Alberto;Chiappe, Cinzia;Dondoni, Alessandro;,期刊：Journal of Organic Chemistry, 页码：6437-6440 , 文章类型： 研究论文，,卷期：2008年73-16] A tetra-azido calix[4]arene deriv. was allowed to Cu(I)-catalyzed azide-alkyne cycloaddn. (CuAAC) (click reaction) with ethynyl tetra-O-benzyl-C-galactoside in the presence of CuI and i-Pr2EtN in three different ionic li... Formal Total Synthesis of (+)-Gephyrotoxin. [作者：Santarem, Marco;Vanucci-Bacque, Corinne;Lhommet, Gerard;,期刊：Journal of Organic Chemistry, 页码：6466-6469 , 文章类型： 研究论文，,卷期：2008年73-16] An efficient formal total synthesis of (+)-gephyrotoxin (I) is described. The key step of our strategy relies on the diastereoselective redn. of a chiral pyrrolidine b-enamino ester II obtained by condensation of (S)-phe... Solid-Phase Synthesis of a-Glucosamine Sulfoforms with Fragmentation Analysis by Tandem Mass Spectrometry. [作者：Liu, Runhui;Chanthamontri, Chamnongsak;Han, Hongling;Hernandez-Torres, Jesus M.;Wood, Karl V.;McLuckey, Scott A.;Wei, Alexander;,期刊：Journal of Organic Chemistry, 页码：6059-6072 , 文章类型： 研究论文，,卷期：2008年73-16] solid-phase synthesis as models of internal glucosamines within heparan sulfate. An orthogonally protected 2'-hydroxyethyl GlcN deriv. was immobilized on a trityl resin support and subjected to regioselective deprotecti... Diversity-Oriented Synthesis of a Drug-Like System Displaying the Distinctive N瓹=O Interaction. [作者：Waibel, Michael;Hasserodt, Jens;,期刊：Journal of Organic Chemistry, 页码：6119-6126 , 文章类型： 研究论文，,卷期：2008年73-16] This study describes the syntheses and characterization of two hydrazino ureas I and II. These fold into a six-membered ring by virtue of the infrequently obsd. d+N瓹:Od- interaction when solvated by polar protic media. ...