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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31条记录   Ruthenium-Porphyrin-Catalyzed Carbenoid Transfer Reactions [作者：ZHOU CONGYING; HUANG JIESHENG; CHE CHIMING,期刊：SYNLETT, 页码：2681-2700 , 文章类型： Article，,卷期：2010年-18] Ruthenium-porphyrins are effective catalysts for a wide variety of carbenoid transfer reactions, such as alkene cyclopropanation, carbon-hydrogen, nitrogen-hydrogen, or sulfur-hydrogen (X-H, X = C, N, S) bond insertion, ... On the Practical Limits of Determining Isolated Product Yields and Ratios of Stereoisomers: Reflections, Analysis, and Redemption [作者：WERNEROVA MARTINA; HUDLICKY TOMAS,期刊：SYNLETT, 页码：2701-2707 , 文章类型： Article，,卷期：2010年-18] This paper examines the limits of accuracy in reporting isolated product yields (i.e., recovery of total mass from chromatography or extractions) as well as ratios of isomers determined by HPLC, GC, or NMR methods. Atten... Towards a Practical Bronsted Acid Catalyzed and Hantzsch Ester Mediated Asymmetric Reductive Amination of Ketones with Benzylamine [作者：WAKCHAURE VIJAY N; NICOLETTI MARCELLO; RATJEN LARS; LIST BENJAMIN,期刊：SYNLETT, 页码：2708-2710 , 文章类型： Article，,卷期：2010年-18] We report the use of benzylamine as the amine component in Hantzsch ester mediated and chiral Bronsted acid catalyzed enantioselective reductive aminations of ketones. The method is noteworthy because the benzyl group is... Towards Glucosamine Building Blocks: Regioselective One-Pot Protection and Deallylation Procedures [作者：ENUGALA RAMU; CARVALHO LUISA C R; MARQUES M MANUEL B,期刊：SYNLETT, 页码：2711-2716 , 文章类型： Article，,卷期：2010年-18] Glucosamine building blocks have been prepared by an efficient regioselective one-pot protection approach. This synthetic route enabled the straightforward preparation of a glucosamine disaccharide in 73% yield. The syst... TBAF-Promoted Dehydrobrominations of Vicinal Dibromides Having an Adjacent O-Functional Group [作者：KUTSUMURA NORIKI; KUBOKAWA KEISUKE; SAITO TAKAO,期刊：SYNLETT, 页码：2717-2720 , 文章类型： Article，,卷期：2010年-18] Regioselective HBr elimination of vicinal dibromides having an adjacent oxygen functional group to give the corresponding 2-bromoalk-1-enes was controlled using 1.1 equivalents of TBAF. Two-step elimination to give the c... Formal Synthesis of AB3217-A from Anisomycin Using a Directed Benzylic Oxidation [作者：TOUEG JULIE; GODFREY CHRISTOPHER R A; WIBLEY JANE E,期刊：SYNLETT, 页码：2721-2724 , 文章类型： Article，,卷期：2010年-18] A formal synthesis of the insecticidal natural product AB3217-A involving an unusual diastereoselective benzylic oxidation is described. Chiral Sodium Phosphate Catalyzed Enantioselective 1,4-Addition of TMSCN to Aromatic Enones [作者：YANG JINGYA; WU SHAOXIANG; CHEN FUXUE,期刊：SYNLETT, 页码：2725-2728 , 文章类型： Article，,卷期：2010年-18] A facile enantioselective 1,4-addition of TMSCN to aromatic enones has been developed using chiral sodium phosphate. Thus, in the presence of 20 mol% of sodium salt generated in situ from (R)-3,3'-di(1-adamantyl)-1,1'-bi... An Expedient Asymmetric Synthesis of N-Protected (S,S)-2-Aminomethyl-1-cyclopropanecarboxylic Acid [作者：AITKEN DAVID J; BULL STEVEN D; DAVIES IWAN R; DROUIN LUDOVIC; OLLIVIER JEAN; PEED JENNIFER,期刊：SYNLETT, 页码：2729-2732 , 文章类型： Article，,卷期：2010年-18] An enantioselective synthesis of a N-Boc-protected trans-cyclopropane gamma-amino acid is reported. The key chiral aldehyde intermediate is prepared in enantiomerically pure form using a three-step aldol-cyclopropanation... Ligand-Free Palladium-Catalyzed C-S Coupling Reactions Using Water as Solvent and Microwaves [作者：VELMATHI SIVAN; VIJAYARAGHAVAN REENA; AMARENDAR CH; PAL RAVINDRA P; VINU AJAYAN,期刊：SYNLETT, 页码：2733-2736 , 文章类型： Article，,卷期：2010年-18] Herein we demonstrate for the first time a rapid and efficient method for the synthesis of aryl sulfides by the direct substitution reaction of aromatic thiols with aryl halides using water as solvent under microwave irr... Gold-Catalyzed Diastereoselective Synthesis of alpha-Fluoroenones from Propargyl Acetates [作者：HOPKINSON MATTHEW N; GIUFFREDI GUY T; GEE ANTONY D; GOUVERNEUR VERONIQUE,期刊：SYNLETT, 页码：2737-2742 , 文章类型： Article，,卷期：2010年-18] A diastereoselective preparation of alpha-fluoroenones from propargyl acetates has been developed proceeding via a gold-catalyzed rearrangement-fluorination cascade. Control reactions are consistent with a mechanism invo... Hydrosilylation-Metathesis Sequence Leading to 1-Silaindenes [作者：MATSUDA TAKANORI; YAMAGUCHI YOSHIYUKI; ISHIDA NAOKI; MURAKAMI MASAHIRO,期刊：SYNLETT, 页码：2743-2746 , 文章类型： Article，,卷期：2010年-18] 1-Silaindenes are prepared starting from (2-vinylphenyl) hydrosilanes and alkynes through a ruthenium-catalyzed hydrosilylation-ring-closing-metathesis sequence. The method is successfully applied to the synthesis of mol... Synthesis of (+)-Sclareolide Based on a Cyclic Enol Ether Ring Contraction Induced by Peroxy Acids [作者：CASTRO JUAN M; SALIDO SOFIA; SANCHEZ ADOLFO; ALTAREJOS JOAQUIN,期刊：SYNLETT, 页码：2747-2750 , 文章类型： Article，,卷期：2010年-18] (+)-Sclareolide has been synthesised from (+)-sclareol oxide in one step in high yield, by treatment with peroxy acids under very mild conditions. The reaction pathway does not follow the usual oxidative cleavage of the ... Synthesis of Spiropyrrolidines and Spiropyrrolizidines by Azomethine Ylide Cycloaddition of Baylis-Hillman Adducts Derived from N-Methyl Maleimide [作者：KARTHIKEYAN K; SARANYA N; KALAIVANI A; PERUMAL P T,期刊：SYNLETT, 页码：2751-2754 , 文章类型： Article，,卷期：2010年-18] The stereoselective synthesis of a series of novel spiropyrrolidines and spiropyrrolizidines has been accomplished through an intermolecular 1,3-dipolar cycloaddition of an azomethine ylides with dipolarophiles derived f... Facile Epoxidation of alpha,beta-Unsaturated Ketones with trans-3,5-Dihydroperoxy-3,5-dimethyl-1,2-dioxolane as an Efficient Oxidant [作者：AZARIFAR DAVOOD; KHOSRAVI KAVEH,期刊：SYNLETT, 页码：2755-2758 , 文章类型： Article，,卷期：2010年-18] Application of trans-3,5-dihydroperoxy-3,5-dimethyl-1,2-dioxolane as an efficient oxygen source has been explored in the epoxidation of trans-chalcones. The reactions proceed under mild conditions at room temperature in ... Mild and General One-Pot Reduction and Cyclization of Aromatic and Heteroaromatic 2-Nitroamines to Bicyclic 2H-Imidazoles [作者：HANAN EMILY J; CHAN BRYAN K; ESTRADA ANTHONY A; SHORE DANIEL G; LYSSIKATOS JOSEPH P,期刊：SYNLETT, 页码：2759-2764 , 文章类型： Article，,卷期：2010年-18] A one-pot procedure for the conversion of aromatic and heteroaromatic 2-nitroamines into bicyclic 2H-benzimidazoles is described. The procedure employs formic acid, iron powder, and an additive such as NH4Cl to reduce th... Enantioselective Nitroaldol Reaction of alpha-Keto Esters Catalyzed by a Copper(II)-Bisoxazolidine Complex [作者：XU HANHUI; WOLF CHRISTIAN,期刊：SYNLETT, 页码：2765-2770 , 文章类型： Article，,卷期：2010年-18] A wide range of aliphatic and aromatic alpha-keto esters has been transformed to alpha-hydroxy-beta-nitro esters via the Cu(II)-bisoxazolidine-catalyzed Henry reaction. In the presence of 10 mol% of the chiral catalyst, ...