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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33条记录   Synthesis of 4-Arylcoumarins via Cu-Catalyzed Hydroarylation with Arylboronic Acids. [作者：Yamamoto, Yoshihiko;Kirai, Naohiro;,期刊：Organic Letters, 页码：5513-5516 , 文章类型： 研究论文，,卷期：2008年10-24] In the presence of 2-4 mol % of CuOAc, Me phenylpropiolates, e.g., I, having a MOM-protected hydroxy group at the ortho position underwent hydroarylation with various arylboronic acids in MeOH at ambient temp., resulting... New Metal-Free One-Pot Synthesis of Substituted Allenes from Enones. [作者：Tang, Meng;Fan, Chun-An;Zhang, Fu-Min;Tu, Yong-Qiang;Zhang, Wen-Xue;Wang, Ai-Xia;,期刊：Organic Letters, 页码：5585-5588 , 文章类型： 研究论文，,卷期：2008年10-24] A new metal-free, one-pot synthesis of substituted allenes from enones was discovered for the first time, in which a tertiary amine as a base was found to be an effective promoter in such novel transformations. The prese... 3,3'- and 4,4'-Biphenylene-Bridged Subporphyrin Dimers. [作者：Inokuma, Yasuhide;Osuka, Atsuhiro;,期刊：Organic Letters, 页码：5561-5564 , 文章类型： 研究论文，,卷期：2008年10-24] synthesized by means of a Ni-catalyzed homocoupling reaction. Distinctly red-shifted absorption bands and enhanced fluorescence were obsd. only for the latter, indicating effective through-bond interactions through a 4,4... 9,10,19,20-Tetraarylporphycenes. [作者：Anju, K. S.;Ramakrishnan, S.;Thomas, Ajesh P.;Suresh, Eringathodi;Srinivasan, Alagar;,期刊：Organic Letters, 页码：5545-5548 , 文章类型： 研究论文，,卷期：2008年10-24] Meso-Tetraarylporphycenes, structural isomers of meso-tetraarylporphyrins, were synthesized by the acid-catalyzed oxidative coupling reaction for the first time which is an alternative synthetic methodol. to the traditio... A highly stereoselective organocatalytic tandem aminoxylation/aza-Michael reaction for the synthesis of tetrahydro-1,2-oxazines. [作者：Zhu, Di;Lu, Min;Chua, Pei Juan;Tan, Bin;Wang, Fei;Yang, Xinhao;Zhong, Guofu;,期刊：Organic Letters, 页码：5629-5629 , 文章类型： 研究论文，,卷期：2008年10-24] On page 4586, a pertinent ref. by M. Lu et al., (2008) was omitted as 7n; the correct version of the ref. is given. Total Synthesis of (-)-2-epi-Peloruside A. [作者：Smith, Amos B., III;Cox, Jason M.;Furuichi, Noriyuki;Kenesky, Craig S.;Zheng, Junying;Atasoylu, Onur;Wuest, William M.;,期刊：Organic Letters, 页码：5501-5504 , 文章类型： 研究论文，,卷期：2008年10-24] A convergent synthesis of (-)-2-epi-peloruside A has been achieved. Highlights include implementation of multi-component type I anion relay chem. (ARC) to unite 2-TBS-1,3-dithiane with two epoxides to construct the easte... Enantioselective Synthesis of a Simple Benzenoid Analog of Glycinoeclepin A. [作者：Giroux, Simon;Corey, E. J.;,期刊：Organic Letters, 页码：5617-5619 , 文章类型： 研究论文，,卷期：2008年10-24] A synthesis of the readily accessible glycinoeclepin A analog I was achieved via an enantioselective Michael reaction and a subsequent Diels-Alder cycloaddn. reaction. I is currently undergoing evaluation for nematocida... Palladium-Catalyzed Highly Regioselective [3 + 2] Cycloaddition Reactions of Alkylidenecyclopropa[b]naphthalenes with Alkenes or Alkynes: An Efficient Synthesis of 1(3)-Alkylidene-2,3-dihydro-1H-benzo[f]indenes and 1-Alkylidene-1H-benzo[f]indenes. [作者：Chen, Wanli;Cao, Jian;Huang, Xian;,期刊：Organic Letters, 页码：5537-5540 , 文章类型： 研究论文，,卷期：2008年10-24] The first palladium-catalyzed highly regioselective [3 + 2] cycloaddn. reactions of alkylidenecyclopropa[b]naphthalenes with alkenes or alkynes is presented, providing an efficient method for the synthesis of 1(3)-alkyli... Carboxylate Directed Cross-Coupling Reactions in the Synthesis of Trisubstituted Benzoic Acids. [作者：Houpis, Ioannis N.;Huang, Changkang;Nettekoven, Ulrike;Chen, Jason G.;Liu, Renmao;Canters, Martine;,期刊：Organic Letters, 页码：5601-5604 , 文章类型： 研究论文，,卷期：2008年10-24] solvent, base, and equiv. of base are the detg. factors for the success of this reaction. The directing effect can be reversed by the appropriate use of phosphine ligands to prep. the para-substituted products selective... Asymmetric, Catalytic, and Direct Self-Aldol Reaction of Acetaldehyde Catalyzed by Diarylprolinol. [作者：Hayashi, Yujiro;Samanta, Sampak;Itoh, Takahiko;Ishikawa, Hayato;,期刊：Organic Letters, 页码：5581-5583 , 文章类型： 研究论文，,卷期：2008年10-24] An asym., catalytic, and direct self-aldol reaction of acetaldehyde was catalyzed by a diarylprolinol organocatalyst in NMP, affording the trimer acetal, which was generated by the reaction of the self-aldol product with... Highly Regioselective Fluorination and Iodination of Alkynyl Enolates. [作者：Yang, Han;Xu, Bo;Hammond, Gerald B.;,期刊：Organic Letters, 页码：5589-5591 , 文章类型： 研究论文，,卷期：2008年10-24] A simple yet efficient approach to various functionalized quaternary a-alkynyl a-fluoro esters and g-iodoallenoates from readily available allenoates through an alkynyl enolate intermediate generated by LDA is presented.... A Ratiometric Fluorescent Probe for Cysteine and Homocysteine Displaying a Large Emission Shift. [作者：Lin, Weiying;Long, Lingliang;Yuan, Lin;Cao, Zengmei;Chen, Bingbing;Tan, Wen;,期刊：Organic Letters, 页码：5577-5580 , 文章类型： 研究论文，,卷期：2008年10-24] 4-(1H-phenanthro[9,10-d]imidazol-2-yl)benzaldehyde (I) was rationally designed as a novel ratiometric fluorescent probe for cysteine and homocysteine. Upon addn. of cysteine or homocysteine, notably, the probe displayed... Meso-Disubstituted Anthracenes with Fluorine-Containing Groups: Synthesis, Light-Emitting Characteristics, and Photostability. [作者：Matsubara, Yoshio;Kimura, Atsushi;Yamaguchi, Yoshihiro;Yoshida, Zen-ichi;,期刊：Organic Letters, 页码：5541-5544 , 文章类型： 研究论文，,卷期：2008年10-24] Synthesis, photophys. properties, and photostability of 9,10-disubstituted anthracenes with fluorine-contg. groups (FCG) are described. The values of Ff and lem greatly go up by the meso-substitution with FCG, and a nic... A Simple Route toward the Synthesis of Bisbenzothiadiazole Derivatives. [作者：Anant, Piyush;Lucas, Nigel T.;Jacob, Josemon;,期刊：Organic Letters, 页码：5533-5536 , 文章类型： 研究论文，,卷期：2008年10-24] A simple and efficient route toward the synthesis of 4,4'-bis(2,1,3-benzothiadiazole) and 7,7'-dibromo-4,4'-bis(2,1,3-benzothiadiazole) has been developed. Oligomers were synthesized with bisbenzothiadiazole units either... Chromium(0)-Promoted [6p + 2p] Cycloadditions of Allenes with Cycloheptatriene. [作者：Rigby, James H.;Laurent, Stephane B.;Kamal, Zeeshan;Heeg, Mary Jane;,期刊：Organic Letters, 页码：5609-5612 , 文章类型： 研究论文，,卷期：2008年10-24] Photoinitiated [6p + 2p] cycloaddns. of allenes with (h6-cycloheptatriene)tricarbonylchromium(0) (1) are described. An example of asym. induction obtained by reaction of 1 with a chiral 1,3-disubstituted allene is also ... Nonradiative Deactivation of Singlet Oxygen (1O2) by Cubane and Its Derivatives. [作者：Lancaster, Jeffrey R.;Marti, Angel A.;Lopez-Gejo, Juan;Jockusch, Steffen;O'Connor, Naphtali;Turro, Nicholas J.;,期刊：Organic Letters, 页码：5509-5512 , 文章类型： 研究论文，,卷期：2008年10-24] The bimol. quenching rate consts. of singlet oxygen (1O2) by cubane and cubane derivs. were detd. and found to be in the order of 103-104 M-1 s-1. These values represent larger values than expected for aliph. alkanes as...