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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60条记录   Unsymmetrical Squaraines Incorporating Quinoline for Near Infrared Responsive Dye-Sensitized Solar Cells [作者：LI JHENGYING; CHEN CHIAYUAN; HO WENCHEIN; CHEN SZUHAN; WU CHUNGUEY,期刊：Organic Letters, 页码：5420-5423 , 文章类型： Article，,卷期：2012年14-21] Two new unsymmetrical squaraines (WCH-SQ10 and WCH-SQ11), wherein the electron-rich 3,4-ethylenedioxy-thiophene conjugated fragment was linked unconventionally to the squaraine core and triphenyl amine donor, and carboxy... Probing the Regiospecificity of Enzyme-Catalyzed Steroid Glycosylation [作者：ZHOU MAOQUAN; HOU YANPENG; HAMZA ADEL; ZHAN CHANGGUO; BUGNI TIM S; THORSON JON S,期刊：Organic Letters, 页码：5424-5427 , 文章类型： Article，,卷期：2012年14-21] The potential of a uniquely permissive engineered glycosyltransferase (OleD ASP) as a catalyst for steroid glycosylation is highlighted. The ability of OleD ASP to glucosylate a range of cardenolides and bufadienolides w... Halogenation of Primary Alcohols Using a Tetraethylammonium Halide/[Et2NSF2]BF4 Combination [作者：POULIOT MARIEFRANCE; MAHE OLIVIER; HAMEL JEANDENYS; DESROCHES JUSTINE; PAQUIN JEANFRANCOIS,期刊：Organic Letters, 页码：5428-5431 , 文章类型： Article，,卷期：2012年14-21] The halogenation of primary alcohols is presented. The use of a combination of tetraethylammonium halide and [Et2NSF2]BF4 (XtalFluor-E) allows for chlorination and bromination reactions to proceed efficiently (up to 92% ... Pseudolaridimers A and B, Hetero-Cycloartane-Labdane Diels-Alder Adducts from the Cone of Pseudolarix amabilis [作者：LI BO; KONG DEYUN; SHEN YUNHENG; YUAN HU; YUE RONGCAI; HE YIREN; LU LU; SHAN LEI; LI HUILIANG; YE JI; YANG XIANWEN; SU JUAN; LIU RUNHUI; ZHANG WEIDONG,期刊：Organic Letters, 页码：5432-5435 , 文章类型： Article，,卷期：2012年14-21] Pseudolaridimers A (1) and B (2), two unprecedented heterodimers formed via a [4 + 2] Diels - Alder cycloaddition between a cycloartane triterpenoid unit and a labdane diterpenoid unit, were isolated from the cones of Ps... Planar Chirality Change in Dediazoniation Reactions of Paracyclophanes and Mechanistic Implication [作者：HE FUYAN; MA YUDAO; ZHAO LEI; DUAN WENZENG; CHEN JIANQIANG; SONG CHUN,期刊：Organic Letters, 页码：5436-5439 , 文章类型： Article，,卷期：2012年14-21] Dediazoniation reactions of (S-p)-4-bromo-13-[2.2]paracyclophanyldiazonium fluoborate 2a through a heterolytic cleavage process gave products with partial racemization. In contrast, dediazoniation reactions of (S-p)-2a u... Enantioselective Synthesis of beta-Aryloxycarboxylic Esters via Asymmetric Hydrogenation of beta-Aryloxy-alpha,beta-Unsaturated Esters [作者：STEWART GAVIN W; SHEVLIN MICHAEL; YAMAGATA ADAM D GAMMACK; GIBSON ANDREW W; KEEN STEPHEN P; SCOTT JEREMY P,期刊：Organic Letters, 页码：5440-5443 , 文章类型： Article，,卷期：2012年14-21] A novel synthesis of beta-aryloxycarboxylic esters via asymmetric hydrogenation of the corresponding beta-aryloxy-alpha,beta-unsaturated esters has been demonstrated. Bis(norbornadiene)rhodium(I) tetrafluoroborate (1 mol... Facile Transformation of Perylene Tetracarboxylic Acid Dianhydride into Strong Donor-Acceptor Chromophores [作者：ZAGRANYARSKI YULIAN; CHEN LONG; ZHAO YANFEI; WONNEBERGER HENRIKE; LI CHEN; MUELLEN KLAUS,期刊：Organic Letters, 页码：5444-5447 , 文章类型： Article，,卷期：2012年14-21] An efficient synthesis of 9,10-dibromo-1,6,7,12-tetrachloro-perylene-3,4-dicarboxylic acid monoimides from easily available 1,6,7,12-tetrachloro-perylene-3,4,9,10-tetracarboxylic acid dianhydride is reported. Therefrom, ... Borylation on Benzo[1,2-b:4,5-b ']- and Naphtho[1,2-b:5,6-b ']dichalcogenophenes: Different Chalcogene Atom Effects on Borylation Reaction Depending on Fused Ring Structure [作者：NAKANO MASAHIRO; SHINAMURA SHOJI; SUGIMOTO RYUSUKE; OSAKA ITARU; MIYAZAKI EIGO; TAKIMIYA KAZUO,期刊：Organic Letters, 页码：5448-5451 , 文章类型： Article，,卷期：2012年14-21] The direct borylation reactions of two types of alpha-silyl-protected acenedichalcogenophenes, i.e., benzo[1,2-b:4,5-b']- and naphtho[1,2-b:5,6-b']dichalcogenophenes, were examined, and it was observed that the reaction ... Palladium-Catalyzed C-H Functionalization Using Guanidine as a Directing Group: Ortho Arylation and Olefination of Arylguanidines [作者：SHAO JIAAN; CHEN WENTENG; GIULIANOTTI MARC A; HOUGHTEN RICHARD A; YU YONGPING,期刊：Organic Letters, 页码：5452-5455 , 文章类型： Article，,卷期：2012年14-21] Palladium-catalyzed C-H functionalization using guanidine as the directing group was achieved under mild reaction conditions. Various guanidine derivatives were produced in moderate to good yields by using simple unactiv... Structural Diversity of New C-13-Polyketides Produced by Chaetomium mollipilium Cultivated in the Presence of a NAD(+)-Dependent Histone Deacetylase Inhibitor [作者：ASAI TEIGO; MORITA SHUNTARO; SHIRATA NAOKI; TANIGUCHI TOHRU; MONDE KENJI; SAKURAI HIROAKI; OZEKI TOMOJI; OSHIMA YOSHITERU,期刊：Organic Letters, 页码：5456-5459 , 文章类型： Article，,卷期：2012年14-21] Cultivation of Chaetomium mollipilium with nicotinamide, a NAD(+)-dependent HDAC inhibitor, stimulated its secondary metabolism, leading to the isolation of structurally diverse new C-13-polyketides, mollipilin A-E (1-5)... Asymmetric Synthesis of the Fully Elaborated Pyrrolidinone Core of Oxazolomycin A [作者：DONOHOE TIMOTHY J; ORIORDAN TIMOTHY J C; PEIFER MANUEL; JONES CHRISTOPHER R; MILES TIMOTHY J,期刊：Organic Letters, 页码：5460-5463 , 文章类型： Article，,卷期：2012年14-21] The asymmetric synthesis of the key pyrrolidinone core, including a highly elaborated exocyclic carbon chain, of the gamma-lactam beta-lactone antibiotic oxazolomycin A is described. Principal features include the Birch ... One-Pot Synthesis of 1-Iodoalkynes and Trisubstituted Alkenes from Benzylic and Allylic Bromides [作者：PELLETIER GUILLAUME; LIE SHARON; MOUSSEAU JAMES J; CHARETTE ANDRE B,期刊：Organic Letters, 页码：5464-5467 , 文章类型： Article，,卷期：2012年14-21] 1-Iodoalkynes are formed in moderate to high yields from readily accessible benzylic and allylic alkyl bromides by a one-pot homologation/double elimination procedure with iodoform (CHI3). The developed conditions includ... Trimethoxyphenylthio as a Highly Labile Replacement for tert-Butylthio Cysteine Protection in Fmoc Solid Phase Synthesis [作者：POSTMA TOBIAS M; GIRAUD MATTHIEU; ALBERICIO FERNANDO,期刊：Organic Letters, 页码：5468-5471 , 文章类型： Article，,卷期：2012年14-21] Trimethoxyphenylthio (S-Tmp) is described as a novel cysteine protecting group in Fmoc solid phase peptide synthesis replacing the difficult to remove tert-butylthio. S-Tmp and dimethoxyphenylthio (S-Dmp) were successful... Acid-Labile Cys-Protecting Groups for the Fmoc/tBu Strategy: Filling the Gap [作者：GONGORABENITEZ MIRIAM; MENDIVETAPIA LORENA; RAMOSTOMILLERO IVAN; BREMAN ARJEN C; TULLAPUCHE JUDIT; ALBERICIO FERNANDO,期刊：Organic Letters, 页码：5472-5475 , 文章类型： Article，,卷期：2012年14-21] To address the existing gap in the current set of acid-labile Cys-protecting groups for the Fmoc/fBu strategy, diverse Fmoc-Cys(PG)-OH derivatives were prepared and incorporated into a model tripeptide to study their sta... Stereoselective Synthesis of Oxa- and Aza-Angular Triquinanes Using Tandem Radical Cyclization to Vinylogous Carbonates and Carbamates [作者：GHARPURE SANTOSH J; NIRANJANA P; PORWAL SUHEEL K,期刊：Organic Letters, 页码：5476-5479 , 文章类型： Article，,卷期：2012年14-21] Tandem radical cyclization to vinylogous carbonates and carbamates is developed for a new, highly stereoselective synthesis of heterocyclic angular triquinanes. The strategy is also useful to gain access to oxa- and azat... Direct beta-Acyloxylation of Enamines via PhIO-Mediated Intermolecular Oxidative C-O Bond Formation and Its Application to the Synthesis of Oxazoles [作者：LIU XIN; CHENG RAN; ZHAO FEIFEI; ZHANGNEGRERIE DAISY; DU YUNFEI; ZHAO KANG,期刊：Organic Letters, 页码：5480-5483 , 文章类型： Article，,卷期：2012年14-21] A direct beta-acyloxylation of enamine compounds has been achieved by using iodosobenzene (PhIO) as an oxidant to realize the intermolecular oxidative C(sp(2))-O bond formation between enamines and various carboxylic aci...