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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53条记录   Facile Synthesis of cis-2-Alkyl-3-trialkylsilyloxycycloalkanones via the Non-Aldol Aldol Rearrangement of 2,3-Epoxycycloalkanols. [作者：Jung, Michael E.;Allen, Damian A.;,期刊：Organic Letters, 页码：2039-2041 , 文章类型： 研究论文，,卷期：2008年10-10] Silyl triflate-promoted rearrangement of cis-2,3-epoxycycloalkanols A, prepd. by epoxidn. of the cyclic allylic alc. and then silylation, afforded good yields (~70-75%) of the cis-2-alkyl-3-silyloxycycloalkanones B, pres... Regioselective and Stereospecific Synthesis of Enantiopure 1,3-Oxazolidin-2-ones by Intramolecular Ring Opening of 2-(Boc-aminomethyl)aziridines. Preparation of the Antibiotic Linezolid. [作者：Moran-Ramallal, Roberto;Liz, Ramon;Gotor, Vicente;,期刊：Organic Letters, 页码：1935-1938 , 文章类型： 研究论文，,卷期：2008年10-10] The amide moiety of several enantiopure unactivated 1-aryl- or 1-alkylaziridine-2-carboxamides I [R = Ph, 4-MeC6H4, 4-MeOC6H4, PhCH2, (S)-PhCHMe] were reduced and then N-Boc-protected to afford enantiopure 2-(Boc-aminome... Alternating Iodonium-Mediated Reaction Cascades Giving Indole- And Quinoline-Containing Polycycles. [作者：Halim, Rosliana;Scammells, Peter J.;Flynn, Bernard L.;,期刊：Organic Letters, 页码：1967-1970 , 文章类型： 研究论文，,卷期：2008年10-10] A simple two-step convergent protocol gives direct access to synthetic intermediate A from ortho-iodoanilines. Intermediate A can be treated with NIS in CH2Cl2 to induce a novel iodonium mediated domino reaction cascade... Base-Catalyzed Intramolecular Hydroamination of Conjugated Enynes. [作者：Zhang, Wen;Werness, Jenny B.;Tang, Weiping;,期刊：Organic Letters, 页码：2023-2026 , 文章类型： 研究论文，,卷期：2008年10-10] A de novo intramol. hydroamination of conjugated enynes was developed using com. available n-BuLi as a precatalyst. This hydroamination reaction successfully afforded allenyl-substituted pyrrolidines with up to 95% yiel... Benzyl Protection of Phenols under Neutral Conditions: Palladium-Catalyzed Benzylations of Phenols. [作者：Kuwano, Ryoichi;Kusano, Hiroki;,期刊：Organic Letters, 页码：1979-1982 , 文章类型： 研究论文，,卷期：2008年10-10] Derivatives, and Condensed Benzenoid Compounds) Section Benzyl protection of phenols under neutral conditions was achieved by using a Pd(h3-C3H5)Cp-DPEphos catalyst. The palladium catalyst efficiently converted aryl ben... Alkenol-alkyne cross metathesis. [作者：Clark, Daniel A.;Clark, Joseph R.;Diver, Steven T.;,期刊：Organic Letters, 页码：2055-2058 , 文章类型： 研究论文，,卷期：2008年10-10] Allyl alcs. and their homologs were used in the enyne cross metathesis to prep. hydroxy-functionalized dienes. Thus, reaction of PhCO2CH2CYCH with HOCH2CH:CH2 in ClCH2CH2Cl contg. Grubbs' second generation catalyst at 8... New, General, and Practical Preparation of Methyl Ketones via the Direct Coupling of Amides with CH2Cl2 Promoted by TiCl4/Mg. [作者：Lin, Kuo-Wei;Tsai, Chi-Hui;Hsieh, I.-Lin;Yan, Tu-Hsin;,期刊：Organic Letters, 页码：1927-1930 , 文章类型： 研究论文，,卷期：2008年10-10] The direct coupling of a variety of amides with CH2Cl2 or CD2Cl2 promoted by TiCl4/Mg/THF provides an extremely simple, practical, selective, and efficient approach for the construction of Me ketones. The efficiency and ... Phorbasins D-F: Diterpenyl-taurines from a Southern Australian Marine Sponge, Phorbas sp. [作者：Zhang, Hua;Capon, Robert J.;,期刊：Organic Letters, 页码：1959-1962 , 文章类型： 研究论文，,卷期：2008年10-10] known phorbasins B and C together with three novel diterpenyl-taurines, phorbasins D-F (e.g. I, phorbasin D ). Partial abs. structures were assigned on the basis of detailed spectroscopic anal. Phorbasins D-F are the fi... Unexpected Photooxidation of H-Bonded Tetracene. [作者：Liang, Zhixiong;Zhao, Wei;Wang, Shenglong;Tang, Qin;Lam, Sheung-Chuen;Miao, Qian;,期刊：Organic Letters, 页码：2007-2010 , 文章类型： 研究论文，,卷期：2008年10-10] In our attempts of tuning the mol. packing of tetracene with H-bonding, we found that tetracenediamide was much more vulnerable to photooxidn. than tetracene in crystals despite their similar sensitivity to photooxidn. i... Palladium-catalyzed carbene insertion and trapping with carbon nucleophiles. [作者：Devine, Sean K. J.;Van Vranken, David L.;,期刊：Organic Letters, 页码：1909-1911 , 文章类型： 研究论文，,卷期：2008年10-10] Three-component coupling of vinyl halides RCH:CHX (X = Br, I), stabilized carbon nucleophiles (Nu) and diazomethyl silane N2CHSiMe3, catalyzed by Pd(0) complexes, gave vinylsilanes RCH(Nu)CH:CHSiMe3 with high yields. Re... Clar-Kekule Structuring in Armchair Carbon Nanotubes. [作者：Martin-Martinez, Francisco J.;Melchor, Santiago;Dobado, Jose A.;,期刊：Organic Letters, 页码：1991-1994 , 文章类型： 研究论文，,卷期：2008年10-10] Geometrical patterns on armchair nanotubes and their dependence on length (up to 10 nm) have been studied using first-principles methods. The results indicate that finite nanotubes do not show a uniform bond structure. ... LDA-Mediated Selective Addition Reaction of Vinylidenecyclopropanes with Aldehydes, Ketones, and Enones: Facile Synthesis of Vinylcyclopropenes, Allenols, and 1,3-Enynes. [作者：Lu, Jian-Mei;Shi, Min;,期刊：Organic Letters, 页码：1943-1946 , 文章类型： 研究论文，,卷期：2008年10-10] Highly selective addn. reaction of vinylidenecyclopropanes was realized by treatment with LDA in THF and quenching with aldehydes, ketones, and enones. A no. of vinylcyclopropenes, allenols, and 1,3-enynes were obtained... Synthesis of Maremycins A and D1 via Cycloaddition of a Nitrone with (E)-3-Ethylidene-1-methylindolin-2-one. [作者：Ueda, Tohru;Inada, Mitsuhide;Okamoto, Iwao;Morita, Nobuyoshi;Tamura, Osamu;,期刊：Organic Letters, 页码：2043-2046 , 文章类型： 研究论文，,卷期：2008年10-10] A concise synthesis of maremycins A (I) and D1 (II) has been accomplished via cycloaddn. of a chiral cyclic nitrone with (E)-3-ethylidene-1-methylindolin-2-one as a key step. This synthesis clarifies the stereochem. of ... An Efficient, One-Pot Synthesis of Isomeric Ellipticine Derivatives through Intramolecular Imino-Diels-Alder reaction. [作者：Gaddam, Vikram;Nagarajan, Rajagopal;,期刊：Organic Letters, 页码：1975-1978 , 文章类型： 研究论文，,卷期：2008年10-10] New analogs of isomeric ellipticine derivs. fused with biol. important pyrroloindole or chromene moiety have been synthesized (e.g. I) by utilizing an intramol. imino Diels-Alder reaction in a single step. First Total Synthesis of Cassiarin A, a Naturally Occurring Potent Antiplasmodial Alkaloid. [作者：Rudyanto, Marcellino;Tomizawa, Yuichiro;Morita, Hiroshi;Honda, Toshio;,期刊：Organic Letters, 页码：1921-1922 , 文章类型： 研究论文，,卷期：2008年10-10] The first total synthesis of cassiarin A (I), an antiplasmodial alkaloid isolated from Cassia siamea, was achieved via sequential alkynylation of arenes with Sonogashira coupling and 6-endo-dig-cyclization of phenolic ox... A Facile Preparation of Imidazolinium Chlorides. [作者：Kuhn, Kevin M.;Grubbs, Robert H.;,期刊：Organic Letters, 页码：2075-2077 , 文章类型： 研究论文，,卷期：2008年10-10] A process for the prepn. of sym. and unsym. imidazolinium chlorides that involves reaction of a formamidine with dichloroethane and a base (a) is described. This method makes it possible to obtain numerous imidazolinium...