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105条记录   A Protocol for Accessing the beta-Azidation of alpha,beta-Unsaturated Carboxylic Acids [作者：ANGELINI TOMMASO; BONOLLO SIMONA; LANARI DANIELA; PIZZO FERDINANDO; VACCARO LUIGI,期刊：Organic Letters, 页码：4610-4613 , 文章类型： Article，,卷期：2012年14-17] This contribution reports the preparation and use of a new immobilized catalyst, PS-DABCOF (9), which has been specifically designed to access for the first time the efficient beta-azidation of alpha,beta-unsaturated car... Palladium-Assisted Regioselective C-H Cyanation of Heteroarenes Using Isonitrile as Cyanide Source [作者：XU SHUGUANG; HUANG XIAOMEI; HONG XIAOHU; XU BIN,期刊：Organic Letters, 页码：4614-4617 , 文章类型： Article，,卷期：2012年14-17] A palladium-catalyzed regioselective C-H cyanation of heteroarenes was achieved using tert-butyl isocyanide as "CN" source, which provides a new and unique strategy for the preparation of (hetero)aryl nitriles. Indoles, ... Synthesis and Structure of Two New Mycolactones Isolated from M. ulcerans subsp shinshuense [作者：HANDE SUDHIR M; KAZUMI YUKO; LAI W GEORGE; JACKSON KATRINA L; MAEDA SHINJI; KISHI YOSHITO,期刊：Organic Letters, 页码：4618-4621 , 文章类型： Article，,卷期：2012年14-17] Two new mycolactones, mycolactones S1 and S2, were isolated from culture agar of Mycobacterium ulcerans subsp. shinshuense. Their structures were established in a three-step procedure: (1) probable structures were specul... Construction of Nitrogen-Fused Tetrahydroquinolines via a Domino Reaction [作者：GIGANT NICOLAS; GILLAIZEAU ISABELLE,期刊：Organic Letters, 页码：4622-4625 , 文章类型： Article，,卷期：2012年14-17] An efficient domino approach for the diastereoselective synthesis of polyfunctionalized nitrogen-fused tetrahydroquinoline frameworks under mild conditions has been developed. The scope and limitation of this transformat... Metal-Free N-H Insertions of Donor/Acceptor Carbenes [作者：HANSEN STEPHANIE R; SPANGLER JILLIAN E; HANSEN JORN H; DAVIES HUW M L,期刊：Organic Letters, 页码：4626-4629 , 文章类型： Article，,卷期：2012年14-17] Synthetically useful transformations arise from the thermal decomposition of aryldiazoacetates in the presence of primary and secondary amines without the use of a metal catalyst. Thermally generated, free donor/acceptor... A Synthetic Method for Palladium-Catalyzed Stannylation at the 5-and 6-Benzo Positions of Indoles [作者：CORCORAN EMILY B; WILLIAMS ANNA B; HANSON ROBERT N,期刊：Organic Letters, 页码：4630-4633 , 文章类型： Article，,卷期：2012年14-17] The stannylation of indole derivatives proceeds in good yields under palladium catalysis (5 mol %) without protection of the indolic nitrogen. The general utility of both PdCl2(PhCN)(2)/PCy3 and Pd(2)dba(3)/PCy3 as catal... Total Synthesis of (+/-)-Hirsutine: Application of Phosphine-Catalyzed Imine-Allene [4+2] Annulation [作者：VILLA REYMUNDO A; XU QIHAI; KWON OHYUN,期刊：Organic Letters, 页码：4634-4637 , 文章类型： Article，,卷期：2012年14-17] The total synthesis of the indole alkaloid hirsutine has been achieved, with a key step being the application of our phosphine-catalyzed [4 + 2] annulation of an imine with ethyl alpha-methylallenoate. From commercially ... Asymmetric Transfer Hydrogenation of Ketimines Using Well-Defined Iron(II)-Based Precatalysts Containing a PNNP Ligand [作者：MIKHAILINE ALEXANDRE A; MAISHAN MAZHARUL I; MORRIS ROBERT H,期刊：Organic Letters, 页码：4638-4641 , 文章类型： Article，,卷期：2012年14-17] Well-defined iron(II)-based complexes containing PNNP ligands catalyze a highly enantioselective reduction of N-(diphenylphosphinoyl)- and N-(p-tolylsulphonyl)-ketimines. Under mild conditions and low catalyst loading, t... Catalytic Asymmetric Addition of Aldehydes to Oxocarbenium Ions: A Dual Catalytic System for the Synthesis of Chromenes [作者：RUEPING MAGNUS; VOLLA CHANDRA M R; ATODIRESEI IULIANA,期刊：Organic Letters, 页码：4642-4645 , 文章类型： Article，,卷期：2012年14-17] A synergistic catalytic system for the first asymmetric addition of aldehydes to in situ generated prochiral oxocarbenium ions has been developed. The dual catalytic protocol allows the simultaneous activation of both el... Direct N-Acylation of Lactams, Oxazolidinones, and Imidazolidinones with Aldehydes by Shvo's Catalyst [作者：ZHANG JIAN; HONG SOON HYEOK,期刊：Organic Letters, 页码：4646-4649 , 文章类型： Article，,卷期：2012年14-17] Direct N-acylation of lactams, oxazolidinones, and imidazolidinones was achieved with aldehydes by Shvo's catalyst without using any other stoichiometric reagent. The N-acylations with alpha,beta-unsaturated aldehydes we... Synthesis of S-Linked Glycoconjugates and S-Disaccharides by Thiol-Ene Coupling Reaction of Enoses [作者：LAZAR LASZLO; CSAVAS MAGDOLNA; HERCZEG MIHALY; HERCZEGH PAL; BORBAS ANIKO,期刊：Organic Letters, 页码：4650-4653 , 文章类型： Article，,卷期：2012年14-17] Free-radical hydrothiolation of the endocyclic double bond of enoses is reported. Reaction between 2-acetoxy-D-glucal and a range of thiols including amino acid, peptide, glycosyl thiols, and sugars with primary or secon... Coronenediimides Synthesized via ICI-Induced Cyclization of Diethynyl Perylenediimides [作者：YAN QIFAN; CAI KANG; ZHANG CHENHAO; ZHAO DAHUI,期刊：Organic Letters, 页码：4654-4657 , 文章类型： Article，,卷期：2012年14-17] Treating diethynyl-substituted perylenediimides with ICI successfully induced an annulation reaction and generated a series of coronenediimide derivatives. Instead of the expected iodine-substituted cyclization product, ... Ru(CO)-salen-Catalyzed Synthesis of Enantiopure Aziridinyl Ketones and Formal Asymmetric Synthesis of (+)-PD 128907 [作者：FUKUNAGA YASUAKI; UCHIDA TATSUYA; ITO YUTARO; MATSUMOTO KENJI; KATSUKI TSUTOMU,期刊：Organic Letters, 页码：4658-4661 , 文章类型： Article，,卷期：2012年14-17] Aziridination of vinyl ketones using SESN3 in the presence Ru(CO)-salen complex 1 provides the enantiopure aziridinyl ketones that can serve as useful chiral building blocks. A formal asymmetric synthesis of (+)-PD 12890... Synthesis of Bicyclic Imidazoles via [2+3] Cycloaddition between Nitriles and Regioselectively Generated alpha-Imino Gold Carbene Intermediates [作者：XIAO YUANJING; ZHANG LIMING,期刊：Organic Letters, 页码：4662-4665 , 文章类型： Article，,卷期：2012年14-17] The cyclic alpha-imino gold carbene intermediate B is most likely generated in situ via regioselective nitrene transfer from an azido group to a tethered terminal alkyne in the presence of a gold catalyst and at ambient ... Enantioselective Total Synthesis of (-)-Laurenditerpenol [作者：PITSINOS EMMANUEL N; ATHINAIOS NIKOLAOS; VIDALI VERONIKI P,期刊：Organic Letters, 页码：4666-4669 , 文章类型： Article，,卷期：2012年14-17] A highly convergent total synthesis of (-)-laurenditerpenol has been accomplished through an organolithium to aldehyde nucleophilic addition. Preparation of the prerequisite key intermediates in optically pure form was b... Highly Enantioselective Organocatalytic Sulfenylation of 3-Aryloxindoles [作者：HAN ZHIQIANG; CHEN WENCHAO; DONG SHENG; YANG CAIYUN; LIU HONGJUN; PAN YUANHUANG; YAN LIN; JIANG ZHIYONG,期刊：Organic Letters, 页码：4670-4673 , 文章类型： Article，,卷期：2012年14-17] An organocatalytic asymmetric sulfenylation of 3-aryloxindoles with N-(sulfanyl)succinimides has been developed by using commercially available (DHOD)(2)PHAL as catalyst. Various chiral 3-benzylthio-, alkylthio-, and ary...