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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69条记录   Water-Mediated Catalyst Preactivation: An Efficient Protocol for C-N Cross-Coupling Reactions. [作者：Fors, Brett P.;Krattiger, Philipp;Strieter, Eric;Buchwald, Stephen L.;,期刊：Organic Letters, 页码：3505-3508 , 文章类型： 研究论文，,卷期：2008年10-16] Derivatives, and Condensed Benzenoid Compounds) Section A protocol for forming a highly active Pd(0) catalyst from Pd(OAc)2, water, and biaryldialkylphosphine ligands has been developed. This protocol generates a cataly... A Highly Diastereo- and Enantioselective Synthesis of Multisubstituted Cyclopentanes with Four Chiral Carbons by the Organocatalytic Domino Michael-Henry Reaction. [作者：Tan, Bin;Chua, Pei Juan;Zeng, Xiaofei;Lu, Min;Zhong, Guofu;,期刊：Organic Letters, 页码：3489-3492 , 文章类型： 研究论文，,卷期：2008年10-16] Highly functionalized cyclopentanes with four stereogenic carbons including two quaternary stereocenters, e.g. I (R = Ph, 3-MeOC6H4, 4-BrC6H4, 2-thienyl, 2-furyl, 1-naphthyl, etc.), have been synthesized in excellent yie... Control of Four Stereocenters in an Organocatalytic Domino Double Michael Reaction: Efficient Synthesis of Multisubstituted Cyclopentanes. [作者：Tan, Bin;Shi, Zugui;Chua, Pei Juan;Zhong, Guofu;,期刊：Organic Letters, 页码：3425-3428 , 文章类型： 研究论文，,卷期：2008年10-16] A highly enantioselective and diastereoselective domino organocatalytic double Michael reaction which provides expedited access to multifunctionalized five-membered rings catalyzed by 9-amino-9-deoxyepiquinine has been d... Controllable Highly Stereoselective Reaction of in situ Generated Magnesium Dienolate Intermediates with Different Electrophiles. [作者：Lu, Zhan;Chai, Guobi;Zhang, Xiaobing;Ma, Shengming;,期刊：Organic Letters, 页码：3517-3520 , 文章类型： 研究论文，,卷期：2008年10-16] An efficient controllable stereoselective a-acylation and -allylation reactions of the magnesium dienolate intermediates, generated in situ by the Fe(III)-catalyzed reaction of allenoates R1CH:C:CR2CO2Et (R1 = Ph, 4-FC6H... Ab initio and density functional theory evidence on the rate-limiting step in the Morita-Baylis-Hillman reaction. [Erratum to document cited in CA147:541355]. [作者：Roy, Dipankar;Sunoj, Raghavan B.;,期刊：Organic Letters, 页码：3651-3651 , 文章类型： 研究论文，,卷期：2008年10-16] On page 4875, in table 2, columns 4 and 5 have incorrect lables and should read: "DE\(DMSO)" and "DE\(water)". The corresponding footnote should read: "DE\ in DMSO and water refers to single-point energies on the mPW1K/... Copper-Mediated C-H Bond Arylation of Arenes with Arylboronic Acids. [作者：Ban, Ikuya;Sudo, Tomoko;Taniguchi, Tadashi;Itami, Kenichiro;,期刊：Organic Letters, 页码：3607-3609 , 文章类型： 研究论文，,卷期：2008年10-16] A new copper-mediated cross-coupling of arenes and arylboronic acids is described. Under the influence of Cu(OCOCF3)2, the C-H bond arylation of electron-rich arenes with arylboronic acids takes place to afford a range ... Novel N,N,P-Tridentate Ligands for the Highly Enantioselective Copper-Catalyzed 1,4-Addition of Dialkylzincs to Enones. [作者：Kawamura, Kenjiro;Fukuzawa, Hitomi;Hayashi, Masahiko;,期刊：Organic Letters, 页码：3509-3512 , 文章类型： 研究论文，,卷期：2008年10-16] (S)-QuCH:NCHRCH2PPh2 (Qu = 2-quinolyl) and 0.1 mol % of Cu(OTf)2 enabled the enantioselective 1,4-addn. of dialkylzincs to cyclic enones to produce 1,4-adducts in up to 99% ee. A Simple Approach To Separate a Mixture of Homopropargylic and Allenic Alcohols. [作者：Fu, Fan;Hoang, Kim Le Mai;Loh, Teck-Peng;,期刊：Organic Letters, 页码：3437-3439 , 文章类型： 研究论文，,卷期：2008年10-16] A simple and practical approach to sep. homopropargylic alc. from allenic alc. has been developed. It involves the formation of an insol. silver acetylide species between silver nitrate and homopropargylic alc. in aq. a... Brevisamide: an unprecedented monocyclic ether alkaloid from the dinoflagellate Karenia brevis that provides a potential model for ladder-frame initiation. [作者：Satake, Masayuki;Bourdelais, Andrea J.;Van Wagoner, Ryan M.;Baden, Daniel G.;Wright, Jeffrey L. C.;,期刊：Organic Letters, 页码：3465-3468 , 文章类型： 研究论文，,卷期：2008年10-16] K. brevis is known for the prodn. of brevetoxins, a family of polycyclic ether toxins, as well as their antagonist brevenal. Further examn. of org. exts. of K. brevis has uncovered yet another unprecedented cyclic ether... Cladoniamides A-G, tryptophan-derived alkaloids produced in culture by Streptomyces uncialis. [作者：Williams, David E.;Davies, Julian;Patrick, Brian O.;Bottriell, Helen;Tarling, Tamsin;Roberge, Michel;Andersen, Raymond J.;,期刊：Organic Letters, 页码：3501-3504 , 文章类型： 研究论文，,卷期：2008年10-16] Cladoniamides A-G were isolated from cultures of S. uncialis, and their structures were elucidated by a combination of spectroscopic anal. and an X-ray diffraction anal. of cladoniamide A (I). The cladoniamides have unp... Sporulenes, heptaprenyl metabolites from Bacillus subtilis spores. [作者：Kontnik, Renee;Bosak, Tanja;Butcher, Rebecca A.;Brocks, Jochen J.;Losick, Richard;Clardy, Jon;Pearson, Ann;,期刊：Organic Letters, 页码：3551-3554 , 文章类型： 研究论文，,卷期：2008年10-16] Sporulene, a C35-terpenoid hydrocarbon with an unusual pentacyclic structure, is produced by B. subtilis during sporulation. Bidirectional switching of near IR emitting boradiazaindacene fluorophores. [作者：Deniz, Erhan;Isbasar, G. Ceyda;Bozdemir, O. Altan;Yildirim, Leyla T.;Siemiarczuk, Aleksander;Akkaya, Engin U.;,期刊：Organic Letters, 页码：3401-3403 , 文章类型： 研究论文，,卷期：2008年10-16] 73, 75, 78 Two novel distyryl-boradiazaindacene dyes with dimethylaminostyryl and pyridylethenyl substituents display opposite spectral shifts on protonation with TFA in org. solvents. This bidirectional switching of th... A New Entry to Carbocyclic Nucleosides: Oxidative Coupling Reaction of Cycloalkenylsilanes with a Nucleobase Mediated by Hypervalent Iodine Reagent. [作者：Yoshimura, Yuichi;Ohta, Masatoshi;Imahori, Tatsushi;Imamichi, Tomozumi;Takahata, Hiroki;,期刊：Organic Letters, 页码：3449-3452 , 文章类型： 研究论文，,卷期：2008年10-16] A novel method for synthesizing carbocyclic nucleosides was developed. The new synthesis includes a direct coupling reaction of cycloalkenylsilanes with a silylated nucleobase catalyzed by a hypervalent iodine reagent. ... Total Synthesis of (?-2-O-Methylneovibsanin H. [作者：Chen, Annette P.-J.;Williams, Craig M.;,期刊：Organic Letters, 页码：3441-3443 , 文章类型： 研究论文，,卷期：2008年10-16] The total synthesis of (?-2-O-methylneovibsanin H (I) was achieved in 12 steps. An acid-catalyzed, one-pot, four-step cascade reaction was key to the concise total synthesis, lending support to the proposed biosynthesis... Terminal aziridines by a-deprotonation/electrophile trapping of N-protected aziridine. [作者：Hodgson, David M.;Hughes, Steven P.;Thompson, Amber L.;Heightman, Tom D.;,期刊：Organic Letters, 页码：3453-3456 , 文章类型： 研究论文，,卷期：2008年10-16] N-tert-Butylsulfonyl and N-tert-butylsulfinyl aziridine undergo a-lithiation/electrophile trapping providing a series of terminal aziridines. With N-tert-butylsulfinyl aziridine complete asym. induction is obsd. a to ni... A Concise Total Synthesis of Largazole, Solution Structure, and Some Preliminary Structure Activity Relationships. [作者：Nasveschuk, Christopher G.;Ungermannova, Dana;Liu, Xuedong;Phillips, Andrew J.;,期刊：Organic Letters, 页码：3595-3598 , 文章类型： 研究论文，,卷期：2008年10-16] A total synthesis of largazole (I) that proceeds in 8 steps from com. materials is reported, along with some structure-activity relationships. A combination of NMR studies and mol. modeling have also provided a prelimina...