个性化文献订阅>文章检索

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   Improved Palladium-Catalysed Synthesis of alpha-Benzyl-beta-keto Esters [作者：BENNETT NICHOLAS J; GOLDBY ANNE; PRINGLE RACHEL,期刊：SYNLETT, 页码：1688-1690 , 文章类型： Article，,卷期：2010年-11] This paper describes the development of an imporved protocol for the synthesis of alpha-benzyl-beta-keto esters from aryl bromides via Heck reaction. The use of this protocol to synthesise a variety of diverse alpha-benz... Cluster Preface: Stereoselective Synthesis of Stereogenic Quaternary Carbons: A Formidable Challenge and Remarkable Recent Progress [作者：OVERMAN LARRY E,期刊：SYNLETT, 页码：1692-1693 , 文章类型： Editorial Material，,卷期：2010年-11] The stereoselective synthesis of stereogenic quaternary carbons is a challenging task, with significant progress being registered only in the last few years. In this Synlett Cluster, the most recent developments are pres... Creation of Quaternary Stereogenic Centers via Copper-Catalyzed Asymmetric Conjugate Addition of Alkenyl Alanes to alpha,beta-Unsaturated Cyclic Ketones [作者：MUELLER DANIEL; HAWNER CHRISTINE; TISSOT MATTHIEU; PALAIS LAETITIA; ALEXAKIS ALEXANDRE,期刊：SYNLETT, 页码：1694-1698 , 文章类型： Article，,卷期：2010年-11] SimplePhos ligands proved to be very powerful ligands in the generation of quaternary stereogenic centers by Michael addition of alkenyl-aluminum reagents to cyclic enones. Using commercially available and easily accessi... Enantioselective Construction of Indanones from Cyclobutanols Using a Rhodium-Catalyzed C-C/C-H/C-C Bond Activation Process [作者：SEISER TOBIAS; CATHOMEN GINO; CRAMER NICOLAI,期刊：SYNLETT, 页码：1699-1703 , 文章类型： Article，,卷期：2010年-11] Enantioselective rhodium(I)-catalyzed reactions of tert-cyclobutanols lead via consecutive C-C/C-H/C-C bond activations to indanones with quaternary stereogenic centers. Organocatalytic Asymmetric Conjugate Additions of Oxindoles and Benzofuranones to Cyclic Enones [作者：PESCIAIOLI FABIO; TIAN XU; BENCIVENNI GIORGIO; BARTOLI GIUSEPPE; MELCHIORRE PAOLO,期刊：SYNLETT, 页码：1704-1708 , 文章类型： Article，,卷期：2010年-11] The asymmetric catalytic synthesis of densely functionalized molecules that contain vicinal quaternary and tertiary stereocenters is a challenge for modern chemical methodology. Here we show that a chiral primary amine, ... Asymmetric Synthesis of Indolines Bearing a Benzylic Quaternary Stereocenter through Intramolecular Arylcyanation of Alkenes [作者：HSIEH JENCHIEH; EBATA SHIRO; NAKAO YOSHIAKI; HIYAMA TAMEJIRO,期刊：SYNLETT, 页码：1709-1711 , 文章类型： Article，,卷期：2010年-11] Enantioselective intramolecular arylcyanation of olefins is achieved by a Ni(cod)(2)/chiral phosphinoxazoline/AlMe2Cl catalyst to give chiral, substituted indoline derivatives bearing a benzylic quaternary stereocenter i... High-Throughput Screening of the Asymmetric Decarboxylative Alkylation Reaction of Enolate-Stabilized Enol Carbonates [作者：MCDOUGAL NOLAN T; VIRGIL SCOTT C; STOLTZ BRIAN M,期刊：SYNLETT, 页码：1712-1716 , 文章类型： Article，,卷期：2010年-11] The use of high-throughput screening allowed for the optimization of reaction conditions for the palladium-catalyzed asymmetric decarboxylative alkylation reaction of enolate-stabilized enol carbonates. Changing to a non... Stereoselective Construction of Adjacent Quaternary Chiral Centers by the Ireland-Claisen Rearrangement: Stereoselection with Esters of Cyclic Alcohols [作者：GU ZHENHUA; HERRMANN AARON T; STIVALA CRAIG E; ZAKARIAN ARMEN,期刊：SYNLETT, 页码：1717-1722 , 文章类型： Article，,卷期：2010年-11] This work describes a study of the Ireland-Claisen rearrangement of alpha,alpha-disubstituted enolates derived from esters of cyclic alcohols. Highly stereoselective enolizaitions could be generally achieved using N-benz... Construction of Quaternary Stereogenic Carbon Centers by the Lewis Base Catalyzed Conjugate Addition of Silyl Ketene Imines to alpha,beta-Unsaturated Aldehydes and Ketones [作者：DENMARK SCOTT E; WILSON TYLER W,期刊：SYNLETT, 页码：1723-1728 , 文章类型： Article，,卷期：2010年-11] Highly site-selective Mukaiyama-Michael additions of silyl ketene imines to alpha,beta-unsaturated aldehydes and ketones are described. The combination of silicon tetrachloride and a chiral bisphosphoramide provides an e... Sodium Triacetoxyborohydride [作者：SAIKIA LAKHINATH,期刊：SYNLETT, 页码：1729-1730 , 文章类型： Editorial Material，,卷期：2010年-11] Boros et al. recently reported the synthesis of diazaindoline 3, where the key step involved rapid reductive amination of aldehyde 1 with aniline 2 by sodium triacetoxyborohydride (STAB-H) and [GRAPHICS] (B) A tandem red... Copper(II) Sulfate [作者：PEREIRA GUILHERME ROCHA,期刊：SYNLETT, 页码：1731-1732 , 文章类型： Editorial Material，,卷期：2010年-11] (A) Preparation of 1,4-Disubstituted 1,2,3-Triazoles: The copper-catalyzed azide-alkyne cycloaddition (CuAAC) broadly know as 'click reaction' has found a widespread use.(7) The reaction is carried out in a mixture of or... Palladium-Catalyzed Heck-Type Coupling of Allyl Esters: beta-Hydride versus beta-Acetoxy Elimination [作者：PAN DELIN; JIAO NING,期刊：SYNLETT, 页码：1577-1588 , 文章类型： Article，,卷期：2010年-11] This account presents recent progress in palladium-catalyzed Heck-type reactions of allyl esters with aryl halides, arylmetallic reagents, or arenes. Many improvements have been achieved to control the regioselectivity o... Catalytic Reactions of Chiral Guanidines and Guanidinium Salts [作者：LEOW DASHENG; TAN CHOONHONG,期刊：SYNLETT, 页码：1589-1605 , 文章类型： Article，,卷期：2010年-11] This account chronicles our discovery and development of catalytic reactions using chiral guanidines and guanidinium salts. Microwave-Assisted, One-Pot Reaction of Pyridines, alpha-Bromoketones and Ammonium Acetate: An Efficient and Simple Synthesis of Imidazo[1,2-a]-pyridines [作者：ADIB MEHDI; MOHAMADI ALI; SHEIKHI EHSAN; ANSARI SAMIRA; BIJANZADEH HAMID REZA,期刊：SYNLETT, 页码：1606-1608 , 文章类型： Article，,卷期：2010年-11] A novel and efficient synthesis of imidazo[1,2-a]pyridines is described. N-Phenacylpyridinium bromides, which were prepared in situ from the addition of pyridines to alpha-bromoketones, undergo nucleophilic addition of a... A Rapid Synthesis of 2-Aryl Polyhydroxylated Pyrrolidines [作者：SU JIAKUN; JIA YUEMEI; HE RUIRUI; RUI PEIXIN; HAN NANYIN; HE XIHUI; XIANG JUNFENG; CHEN XIN; ZHU JINGHUA; YU CHUYI,期刊：SYNLETT, 页码：1609-1616 , 文章类型： Article，,卷期：2010年-11] Friedel-Crafts-type reaction of electron-rich aromatic compounds with polyhydroxylated cyclic nitrones catalyzed by Bronsted acid afforded 2-aryl polyhydroxylated pyrrolidines in good to excellent yields with high diaste...