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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 of Eudistomin C and E: Improved Preparation of the Indole Unit. [作者：Yamagishi, Hiroaki;Matsumoto, Koji;Iwasaki, Kotaro;Miyazaki, Tohru;Yokoshima, Satoshi;Tokuyama, Hidetoshi;Fukuyama, Tohru;,期刊：Organic Letters, 页码：2369-2372 , 文章类型： 研究论文，,卷期：2008年10-12] An improved synthesis of the indole unit I, a key intermediate for eudistomin C, was established utilizing Makosza's indole synthesis. A concise total synthesis of eudistomin E (II) was achieved on the basis of the impr... Zinc-Catalyzed Synthesis of Pyrazolines and Pyrazoles via Hydrohydrazination. [作者：Alex, Karolin;Tillack, Annegret;Schwarz, Nicolle;Beller, Matthias;,期刊：Organic Letters, 页码：2377-2379 , 文章类型： 研究论文，,卷期：2008年10-12] A novel regioselective synthesis of aryl-substituted pyrazolines I (R = H, 4-Me, 2-Cl, 4-cyano, etc.) and pyrazoles II (R = 4-Me, 2-Me, 4-i-Pr, 4-Br) has been developed. Substituted phenylhydrazines react with 3-butynol... Copper-Mediated Domino Process for the Synthesis of Tetraiodinated Di(perylene bisimide). [作者：Shi, Yubai;Qian, Hualei;Li, Yan;Yue, Wan;Wang, Zhaohui;,期刊：Organic Letters, 页码：2337-2340 , 文章类型： 研究论文，,卷期：2008年10-12] Compounds (More Than One Hetero Atom)) Section A tetraiodinated di(perylene bisimide) was prepd. from a tetrabrominated perylene bisimide via Ullmann-type coupling, C-H transformation, and halogen-exchange. Crystal stru... Biaryl Formation from 5-(2-Bromobenzyl)-Substituted Piperidin-2-ones via Palladacycles. [作者：Satyanarayana, Gedu;Maier, Martin E.;,期刊：Organic Letters, 页码：2361-2364 , 文章类型： 研究论文，,卷期：2008年10-12] The reaction of piperdin-2-ones with a 2-bromobenzyl substituent in the 5-position in the presence of a palladium catalyst leads to biaryl compds. E.g., reaction of cyclic enamide I in presence of Pd(OAc)2/PPh3 gave 48%... Novel Isocyanide-Based Four-Component Reaction: A Facile Synthesis of Fully Substituted 3,4-Dihydrocoumarin Derivatives. [作者：Shaabani, Ahmad;Soleimani, Ebrahim;Rezayan, Ali Hossein;Sarvary, Afshin;Khavasi, Hamid Reza;,期刊：Organic Letters, 页码：2581-2584 , 文章类型： 研究论文，,卷期：2008年10-12] A novel isocyanide-based four-component reaction between 2-hydroxybenzaldehydes, Meldrum's acid, isocyanides, and arom. or aliph. alcs. efficiently provide 3,4-dihydrocoumarin derivs., e.g. I, in good to excellent yields... Au(I)- and Pt(II)-Catalyzed Cycloetherification of w-Hydroxy Propargylic Esters. [作者：De Brabander, Jef K.;Liu, Bo;Qian, Mingxing;,期刊：Organic Letters, 页码：2533-2536 , 文章类型： 研究论文，,卷期：2008年10-12] Depending on the nature of the metal catalyst, w-hydroxy propargylic acetates choose between alternative cycloetherification manifolds to produce functionalized heterocycles in high yields. AuCl catalyzes the formation ... Gold(I)-Catalyzed Divergence in the Reactivity of 3-Silyloxy 1,6-Enynes: Pinacol-Terminated vs Claisen-Terminated Cyclization Cascades. [作者：Baskar, Baburaj;Bae, Hyo J.;An, Sang E.;Cheong, Jae Y.;Rhee, Young H.;Duschek, Alexander;Kirsch, Stefan F.;,期刊：Organic Letters, 页码：2605-2607 , 文章类型： 研究论文，,卷期：2008年10-12] On activation with catalytic amts. of gold(I) complexes, 3-silyloxy 1,6-enynes can react through two alternative pathways. In one, a cascade reaction consisting of carbocyclization and subsequent pinacol rearrangement t... Lewis acid-catalyzed conjugate additions of silyloxyallenes: a selective solution to the intermolecular Rauhut-Currier problem. [作者：Reynolds, Troy E.;Binkley, Michael S.;Scheidt, Karl A.;,期刊：Organic Letters, 页码：2449-2452 , 文章类型： 研究论文，,卷期：2008年10-12] Silyloxyallenes serve as highly useful a-acylvinyl anion equiv. These latent allenolates undergo conjugate addns. to alkylidene malonates in the presence of 10 mol % Sc(OTf)3. The reaction delivers intermol. Rauhut-Cur... Direct Synthesis of 1,3-Diketones by Rh-Catalyzed Reductive a-Acylation of Enones. [作者：Sato, Kazuyuki;Yamazoe, Satoshi;Yamamoto, Rie;Ohata, Shizuka;Tarui, Atsushi;Omote, Masaaki;Kumadaki, Itsumaro;Ando, Akira;,期刊：Organic Letters, 页码：2405-2408 , 文章类型： 研究论文，,卷期：2008年10-12] 1,3-Diketones were synthesized from a,b-unsatd. ketones by treatment with acid chlorides and Et2Zn in the presence of RhCl(PPh3)3. Thus, reaction of MeCOCH:CH2 with PhCOCl in THF contg. RhCl(PPh3)3 and Et2Zn at 0?to roo... Efficient Synthetic Method of Multisubstituted Allenes from the Reactions of Allylindium Reagents with 3?Propargyl Alcohols. [作者：Lee, Kooyeon;Lee, Phil Ho;,期刊：Organic Letters, 页码：2441-2444 , 文章类型： 研究论文，,卷期：2008年10-12] An efficient synthetic method of tri- and tetra-substituted allenes having an allyl and methallyl group was developed by the reactions of allylindium reagents generated in situ from indium and allyl bromides with 3?propa... Efficient Preparation of Terminal Conjugated Dienes by Coupling of Dienol Phosphates with Grignard Reagents under Iron Catalysis. [作者：Cahiez, Gerard;Habiak, Vanessa;Gager, Olivier;,期刊：Organic Letters, 页码：2389-2392 , 文章类型： 研究论文，,卷期：2008年10-12] An efficient new route to prep. stereoselectively terminal conjugated dienes, e.g. (E)-n-C8H17CH:CHCH:CH2, by coupling Grignard reagents and dienol phosphates, e.g. (E)-H2C:CHCH:CHOPO(OEt)2, in the presence of Fe(acac)3 ... Building Addressable Libraries: Site-Selective Formation of an N-Acyliminium Ion Intermediate. [作者：Kesselring, David;Maurer, Karl;Moeller, Kevin D.;,期刊：Organic Letters, 页码：2501-2504 , 文章类型： 研究论文，,卷期：2008年10-12] A strategy for site-selectively generating reactive N-acyliminium ion intermediates on a microelectrode array has been developed. The route capitalizes on the use of an electroauxiliary for building a methoxylated amino... Alcohol Uncaging with Fluorescence Reporting: Evaluation of o-Acetoxyphenyl Methyloxazolone Precursors. [作者：Gagey, Nathalie;Emond, Matthieu;Neveu, Pierre;Benbrahim, Chouaha;Goetz, Bernard;Aujard, Isabelle;Baudin, Jean-Bernard;Jullien, Ludovic;,期刊：Organic Letters, 页码：2341-2344 , 文章类型： 研究论文，,卷期：2008年10-12] This paper evaluates a series of photolabile protecting groups with built-in fluorescence reporting. They rely on readily available o-acetoxyphenyl methyloxazolones as activated precursors. Alc. substrates are easily c... Liquid Enol Ethers and Acetates as Gaseous Alkyne Equivalents in Rh-Catalyzed Chemo- and Regioselective Formal Cross-Alkyne Cyclotrimerization. [作者：Hara, Hiromi;Hirano, Masao;Tanaka, Ken;,期刊：Organic Letters, 页码：2537-2540 , 文章类型： 研究论文，,卷期：2008年10-12] A cationic rhodium(I)/rac-BINAP complex catalyzes chemo- and regioselective formal cross-cyclotrimerizations of alkynes with enol ethers or acetates. Com. available and cheap liq. enol ethers and acetates could be used ... N-Heterocyclic Carbene (NHC)-Catalyzed Direct Amidation of Aldehydes with Nitroso Compounds. [作者：Wong, Fong Tian;Patra, Pranab K.;Seayad, Jayasree;Zhang, Yugen;Ying, Jackie Y.;,期刊：Organic Letters, 页码：2333-2336 , 文章类型： 研究论文，,卷期：2008年10-12] N-Heterocyclic carbene-catalyzed direct amidation of aldehydes R1CHO (R1 = H2C:CH, cyclopropyl, Bu, EtO2CCH:CH, Ph, cyclohexyl, 4-MeOC6H4, etc.) with nitrosoarenes R2NO (R2 = Ph, 2-MeC6H4, 2,6-F2C6H3, 4-Me2NC6H4, 3,5-Me2... (1-Nosyl-5-nitroindol-3-yl)methyl Ester: A Novel Protective Group for Carboxylic Acids. [作者：Nishimura, Takuya;Yamada, Kouhei;Takebe, Tohru;Yokoshima, Satoshi;Fukuyama, Tohru;,期刊：Organic Letters, 页码：2601-2604 , 文章类型： 研究论文，,卷期：2008年10-12] The usefulness of (1-nosyl-5-nitroindol-3-yl)methyl esters as a novel protective group for carboxylic acid is fully demonstrated. The novel protective group is stable under a broad range of conditions and can easily be ...