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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68条记录   Palladium-Catalyzed Insertion of CO2 into Vinylaziridines: New Route to 5-Vinyloxazolidinones [作者：FONTANA FRANCESCO; CHEN C CHUN; AGGARWAL VARINDER K,期刊：Organic Letters, 页码：3454-3457 , 文章类型： Article，,卷期：2011年13-13] 2-Vinylaziridines undergo a mild Pd-catalyzed ring-opening cyclization reaction with an ambient atmosphere of carbon dioxide to give 5-vinyloxazolidinones. The process is high yielding as well as regio- and stereoselecti... Regiodivergent Annulation of Alkynyl Indoles To Construct Spiro-pseudoindoxyl and Tetrahydro-beta-carbolines [作者：ZHANG YONGQIANG; ZHU DAOYONG; JIAO ZHIWEI; LI BAOSHENG; ZHANG FUMIN; TU YONGQIANG; BI ZHIGANG,期刊：Organic Letters, 页码：3458-3461 , 文章类型： Article，,卷期：2011年13-13] Regiodivergent annulations of 3-phenoxy alkynyl indoles have been developed and tuned by protective groups through gold catalysis. With electron-donating protective groups, the substrate followed a C3-selective annulatio... Metal-Free Synthesis of Aryl Esters from Carboxylic Acids and Diaryliodonium Salts [作者：PETERSEN TUE B; KHAN REHAN; OLOFSSON BERIT,期刊：Organic Letters, 页码：3462-3465 , 文章类型： Article，,卷期：2011年13-13] An efficient arylation of carboxylic acids with diaryliodonium salts has been developed, giving aryl esters in high yields within short reaction times for both aromatic and aliphatic substrates. The transition-metal-free... Palladium Catalyzed C-C Coupling Reactions of 3,5-Dichloro-4H-1,2,6-thiadiazin-4-one [作者：IOANNIDOU HERAKLIDIA A; KIZAS CHRISTOS; KOUTENTIS PANAYIOTIS A,期刊：Organic Letters, 页码：3466-3469 , 文章类型： Article，,卷期：2011年13-13] Palladium catalyzed Suzuki-Miyaura, Stille, and Sonogashira coupling reactions are reported for the electron-deficient heterocyclic scaffold 3,5-dichloro-4H-1,2,6-thiadiazin-4-one (1). Furthermore, 3,5-di(thien-2-yl)-4H-... Trifluoromethanesulfonic Acid Catalyzed Isomerization of Kinetic Enol Derivatives to the Thermodynamically Favored Isomers [作者：LEE PHIL HO; KANG DONGJIN; CHOI SUBIN; KIM SUNGGAK,期刊：Organic Letters, 页码：3470-3473 , 文章类型： Article，,卷期：2011年13-13] Trifluoromethanesulfonic acid catalyzed isomerization of kinetic enol derivatives to the thermodynamically favored isomers was developed. Under the present conditions, kinetic enol phosphates, enol acetates and benzoates... Environment- and Sequence-Dependence of Helical Type in Membrane-Spanning Peptides Composed of beta(3)-Amino Acids [作者：KORENDOVYCH IVAN V; SHANDLER SCOTT J; MONTALVO GERONDA L; DEGRADO WILLIAM F,期刊：Organic Letters, 页码：3474-3477 , 文章类型： Article，,卷期：2011年13-13] Transmembrane (TM) beta-peptides comprised of acyclic beta(3)-amino acids demonstrate equilibrium between 12- and 14-helical structures in an environment- and sequence-dependent manner. Circular dichroism (CD) spectra of... Ni(II)/Zn Catalyzed Reductive Coupling of Aryl Halides with Diphenylphosphine Oxide in Water [作者：ZHANG XINGHUA; LIU HUIZHI; HU XIAOMEI; TANG GUO; ZHU JUN; ZHAO YUFEN,期刊：Organic Letters, 页码：3478-3481 , 文章类型： Article，,卷期：2011年13-13] P-Arylation in water has been developed via cross-coupling of aryl halides with diphenylphosphine oxide (Ph2P(O)H) and (R-P)-(-)-menthyl benzylphosphinate catalyzed by NiCl2 center dot 6H(2)O/Zn under relatively mild con... Diastereoselective Construction of 7-Methylenebicyclo[3.2.1]oct-3-en-2-one Derivatives by Palladium-Catalyzed Cyclization of Propargylic Acetates with 2-Oxocyclohex-3-enecarboxylates [作者：YOSHIDA MASAHIRO; SUGIMURA CHIYUKI; SHISHIDO KOZO,期刊：Organic Letters, 页码：3482-3485 , 文章类型： Article，,卷期：2011年13-13] The reaction of propargylic acetates with 2-oxocyclohex-3-enecarboxylates in the presence of a palladium catalyst is described. Substituted 7-methylenebicyclo[3.2.1]oct-3-en-2-ones were synthesized in a highly diastereos... A Nonpeptidic Reverse-Turn Scaffold Stabilized by Urea-Based Dual Intramolecular Hydrogen Bonding [作者：MEDDA AMIYA K; PARK CHUL MIN; JEON ARAM; KIM HYUNWOO; SOHN JEONGHUN; LEE HEESEUNG,期刊：Organic Letters, 页码：3486-3489 , 文章类型： Article，,卷期：2011年13-13] A novel nonpeptidic reverse-turn scaffold containing urea fragments that are connected by a conformationally constrained D-prolyl-cis-1,2-diaminocyclohexane (D-Pro-DACH) linker is reported. The scaffold adopts a well-def... Nickel(0)-Catalyzed Cyclization of N-Benzoylaminals for Isoindolinone Synthesis [作者：SHACKLADYMCATEE DANIELLE M; DASGUPTA SRIMOYEE; WATSON MARY P,期刊：Organic Letters, 页码：3490-3493 , 文章类型： Article，,卷期：2011年13-13] A nickel(0) catalyst effectively mediates the cyclization of N-benzoyl aminals in the presence of a stoichiometric Lewis acid. This method enables preparation of a variety of isoindolinones with substitution on the benzo... Fusing Triazoles: Toward Extending Aromaticity [作者：JURICEK MICHAL; STOUT KATHLEEN; KOUWER PAUL H J; ROWAN ALAN E,期刊：Organic Letters, 页码：3494-3497 , 文章类型： Article，,卷期：2011年13-13] A novel method to extend aromaticity by one benzene and two triazole rings was developed and optimized. This two-step route employs the copper-catalyzed azide-haloalkyne cycloaddition reaction of an ortho-bis(iodoacetyle... Peptide/Laccase Cocatalyzed Asymmetric alpha-Oxyamination of Aldehydes [作者：AKAGAWA KENGO; KUDO KAZUAKI,期刊：Organic Letters, 页码：3498-3501 , 文章类型： Article，,卷期：2011年13-13] An asymmetric alpha-oxyamination could be successfully performed by a peptide catalyst and laccase. The combination of peptide catalysis and enzymatic air oxidation promoted the reaction smoothly in water without employi... A Highly Efficient Type I beta-Turn Mimetic Simulating an Asx-Pro-Turn-Like Structure [作者：PINSKER ANDREA; EINSIEDEL JUERGEN; HAERTERICH STEFFEN; WAIBEL REINER; GMEINER PETER,期刊：Organic Letters, 页码：3502-3505 , 文章类型： Article，,卷期：2011年13-13] Asx-Pro-turns have been identified with high frequency in protein structures nucleating type I beta-turns. By bridging the amino acid side chain in position i with a nitrogen substituent in position i+2 by ring-closing o... Enantioselective Cyclization of 4-Alkenoic Acids via an Oxidative Allylic C-H Esterification [作者：TAKENAKA KAZUHIRO; AKITA MITSUTOSHI; TANIGAKI YUGO; TAKIZAWA SHINOBU; SASAI HIROAKI,期刊：Organic Letters, 页码：3506-3509 , 文章类型： Article，,卷期：2011年13-13] An enantioselective intramolecular oxidative cyclization of 4-alkenoic acids was developed. The reaction proceeded via a pi-allyl Pd intermediate generated by an allylic C-H activation to give gamma-lactone derivatives w... A Chiral Perazamacrocyclic Fluorescent Sensor for Cascade Recognition of Cu(II) and the Unmodified alpha-Amino Acids in Protic Solutions [作者：YANG XIA; LIU XUECHAO; SHEN KANG; ZHU CHENGJIAN; CHENG YIXIANG,期刊：Organic Letters, 页码：3510-3513 , 文章类型： Article，,卷期：2011年13-13] A novel chiral Perazamacrocyclic fluorescent sensor (1) was designed and synthesized. It can serve as a fluorescent turn-off sensor with high selectivity toward Cu(II) among 14 metal ions. Furthermore, though 1 exhibits ... Stereoselective Synthesis of Core Structure of Cortistatin A [作者：KOTOKU NAOYUKI; SUMII YUJI; KOBAYASHI MOTOMASA,期刊：Organic Letters, 页码：3514-3517 , 文章类型： Article，,卷期：2011年13-13] A stereoselective synthesis of the core structure of cortistatin A (1), a novel antiangiogenic steroidal alkaloid from Indonesian marine sponge, is described. An 8-oxabicyclo[3.2.1]octene system, a characteristic B-ring ...