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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99条记录   A Remarkably Simple Protocol for the N-Formylation of Amino Acid Esters and Primary Amines [作者：SUCHY MOJMIR; ELMEHRIKI ADAM A H; HUDSON ROBERT H E,期刊：Organic Letters, 页码：3952-3955 , 文章类型： Article，,卷期：2011年13-15] A simple, convenient, and wide scope protocol for the N-formylation of amino acid esters and primary amines has been developed utilizing only imidazole in warm DMF. Synthesis and Suzuki-Miyaura Cross-Coupling Reactions of Potassium Boc-Protected Aminomethyltrifluoroborate with Aryl and Hetaryl Halides [作者：MOLANDER GARY A; SHIN INJI,期刊：Organic Letters, 页码：3956-3959 , 文章类型： Article，,卷期：2011年13-15] Potassium Boc-protected aminomethyltrifluoroborate, a primary aminomethyl equivalent, was synthesized successfully through a "one-pot" process. With this trifluoroborate, Suzuki-Miyaura cross-coupling reactions were inve... Facile Sc(OTf)(3)-Catalyzed Generation and Successive Aromatization of Isobenzofuran from o-Dicarbonylbenzenes [作者：NISHINA YUTA; KIDA TATSUYA; URESHINO TOMONARI,期刊：Organic Letters, 页码：3960-3963 , 文章类型： Article，,卷期：2011年13-15] Isobenzofuran can be prepared from o-phthalaldehyde using hydrosilane. The formed isobenzofuran Is trapped by an alkene via a Diels-Alder reaction. Further dehydration proceeds to furnish the conjugated aromatic compound... Ruthenium-Catalyzed Reductive Amination of Allylic Alcohols [作者：SAHLI ZEYNEB; SUNDARARAJU BASKER; ACHARD MATHIEU; BRUNEAU CHRISTIAN,期刊：Organic Letters, 页码：3964-3967 , 文章类型： Article，,卷期：2011年13-15] Straighforward access to various saturated amines from allylic alcohols and Isostructural mixture can now be achieved In the presence of arene ruthenium catalyst featuring phosphinesulfonate ligand and a hydrogen donor. A Tertiary Amine as A Hydride Donor: Trichlorosilyl Triflate-mediated Conjugate Reduction of Unsaturated Ketones [作者：KOTANI SHUNSUKE; OSAKAMA KAZUKI; SUGIURA MASAHARU; NAKAJIMA MAKOTO,期刊：Organic Letters, 页码：3968-3971 , 文章类型： Article，,卷期：2011年13-15] Bulky tertiary amines, especially dicyclohexylisobutylamine, smoothly reduced alpha,beta-unsaturated ketones in the presence of trichlorosilyl triflate to give the corresponding saturated ketones In excellent yields. Iso... Organocatalyzed Regio- and Enantioselective Allylic Trifluoromethylation of Morita-Baylis-Hillman Adducts Using Ruppert-Prakash Reagent [作者：FURUKAWA TATSUYA; NISHIMINE TAKAYUKI; TOKUNAGA ETSUKO; HASEGAWA KIMIKO; SHIRO MOTOO; SHIBATA NORIO,期刊：Organic Letters, 页码：3972-3975 , 文章类型： Article，,卷期：2011年13-15] The organocatalyzed regioselective allylic trifluoromethylation of Morita-Baylis-Hillman adducts using Ruppert-Prakash reagent was achieved in high to excellent yields via a successive S(N)2'/S(N)2' mode for the first ti... The Preparation of (-)-Grandisine B from (+)-Grandisine D; A Biomimetic Total Synthesis or Formation of an Isolation Artefact? [作者：CUTHBERTSON JAMES D; GODFREY ANDREW A; TAYLOR RICHARD J K,期刊：Organic Letters, 页码：3976-3979 , 文章类型： Article，,卷期：2011年13-15] An efficient new alkyne-acetal cyclization procedure has been developed to prepare enantiopure Indolizidine building blocks from L-proline and then applied to prepare the Elaeocarpus-derived alkaloids grandisine B and gr... Synthesis of the Tricyclic Core of Labiatin A and Australin A [作者：CLARK J STEPHEN; VIGNARD DAVID; PARKIN ANDREW,期刊：Organic Letters, 页码：3980-3983 , 文章类型： Article，,卷期：2011年13-15] A concise synthesis of the tricyclic core of the marine diterpene natural products labiatin A and australin A has been accomplished. The key ring forming transformation is a cascade reaction comprising generation of a co... Silver Triflate-Catalyzed Cyclopropenation of Internal Alkynes with Donor-/Acceptor-Substituted Diazo Compounds [作者：BRIONES JOHN F; DAVIES HUW M L,期刊：Organic Letters, 页码：3984-3987 , 文章类型： Article，,卷期：2011年13-15] Silver triflate was found to be an efficient catalyst for the cyclopropenation of internal alkynes using donor-/acceptor-substituted diazo compounds as carbenoid precursors. Highly substituted cyclopropenes, which cannot... Total Syntheses of (-) Epilupinine and (-)-Tashiromine Using Imino-Aldol Reactions [作者：CUTTER AMANDA C; MILLER IAIN R; KEILY JOHN F; BELLINGHAM RICHARD K; LIGHT MARK E; BROWN RICHARD C D,期刊：Organic Letters, 页码：3988-3991 , 文章类型： Article，,卷期：2011年13-15] Short routes to enantiomerically pure indolizidine and quinolizidine alkaloids have been developed using imino-aldol reactions of enolates derived from phenyl 5-chlorovalerate. High levels of syn selectivity (dr similar ... Pseudocryptand-Type [2]Pseudorotaxanes Based on Bis(meta-phenylene)-32-Crown-10 Derivatives and Paraquats with Remarkably Improved Association Constants [作者：NIU ZHENBIN; SLEBODNICK CARLA; SCHOONOVER DANIEL; AZURMENDI HUGO; HARICH KIM; GIBSON HARRY W,期刊：Organic Letters, 页码：3992-3995 , 文章类型： Article，,卷期：2011年13-15] The first dual component pseudocryptand-type [2]pseudorotaxanes were designed and prepared via the self-assembly of synthetically easily accessible bis(meta-phenylene)-32-crown-10 pyridyl, quinolyl, and naphthyridyl deri... N-Alkynyl Imides (Ynimides): Synthesis and Use as a Variant of Highly Labile Ethynamine [作者：SUEDA TAKUYA; OSHIMA AYUMI; TENO NAOKI,期刊：Organic Letters, 页码：3996-3999 , 文章类型： Article，,卷期：2011年13-15] This study describes the first reliable synthesis of N-alkynyl imides (ynimides). This was accomplished with a copper-catalyzed coupling reaction between alkynyl(triaryl)bismuthonium salts and five-membered imides. We al... Bambus[n]urils: a New Family of Macrocyclic Anion Receptors [作者：HAVEL VACLAV; SVEC JAN; WIMMEROVA MICHAELA; DUSEK MICHEL; POJAROVA MICHAELA; SINDELAR VLADIMIR,期刊：Organic Letters, 页码：4000-4003 , 文章类型： Article，,卷期：2011年13-15] A recently discovered anion receptor is Jointed by three related macrocycles differing in the number of glycoluril units and type of substitution. The synthesis is carried out in nonpolar solvents compared to aqueous med... Domino Process Optimized via ab Initio Study for an Alternative Access to Bicyclic Lactams [作者：COMESSE SEBASTIEN; MARTEL ARNAUD; DAICH ADAM,期刊：Organic Letters, 页码：4004-4007 , 文章类型： Article，,卷期：2011年13-15] A totally new acid-free domino process to access highly functionalized bicyclic gamma-and delta-lactams starting from commercially available and inexpensive ethoxymethylene derivatives is reported. Mechanisms elucidated ... Covalent Reinforcement of Hydrogen-Bonded Discs into Stably Folded Helical Structures [作者：CHEN ZHONGZHU; URBAN NATHANIEL D; GAO YI; ZHANG WENRUI; DENG JINGEN; ZHU JIN; ZENG XIAO CHENG; GONG BING,期刊：Organic Letters, 页码：4008-4011 , 文章类型： Article，,卷期：2011年13-15] The presence of covalent tethers significantly enhanced the stability of structures consisting of helically arranged benzenetricarboxamide units that otherwise undergo very weak hydrogen-bonding interaction. The resultan... A Cycloisomerization/Friedel-Crafts Alkylation Strategy for the Synthesis of Pyrano[3,4-b]indoles [作者：MEDEIROS MATTHEW R; SCHAUS SCOTT E; PORCO JOHN A JR,期刊：Organic Letters, 页码：4012-4015 , 文章类型： Article，,卷期：2011年13-15] The synthesis of pyrano[3,4-b]indoles is described. The reaction sequence involves Sonogashira coupling of dihydropyran propargyl ether scaffolds with iodoanilines to afford intermediate indoles. Lewis acid-catalyzed Ion...