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75条记录   Selective Reduction of Carboxylic Acids to Aldehydes Catalyzed by B(C6F5)(3) [作者：BEZIER DAVID; PARK SEHOON; BROOKHART MAURICE,期刊：Organic Letters, 页码：496-499 , 文章类型： Article，,卷期：2013年15-3] B(C6F5)(3) efficiently catalyzes hydrosilylation of aliphatic and aromatic carboxylic acids to produce disilyl acetals under mild conditions. Catalyst loadings can be as low as 0.05 mol %, and bulky tertiary silanes are ... Pd-Catalyzed Aldehyde to Ester Conversion: A Hydrogen Transfer Approach [作者：TSCHAEN BRITTANY A; SCHMINK JASON R; MOLENDER GARY A,期刊：Organic Letters, 页码：500-503 , 文章类型： Article，,卷期：2013年15-3] Aliphatic and aromatic aldehydes are successfully converted Into their corresponding esters using Pd(OAc)(2) and XPhos. This approach utilizes a hydrogen transfer protocol: concomitant reduction of acetone to isopropanol... Applications of Thiyl Radical Cyclizations for the Synthesis of Thiosugars [作者：MALONE AOIFE; SCANLAN EOIN M,期刊：Organic Letters, 页码：504-507 , 文章类型： Article，,卷期：2013年15-3] The use of intramolecular thiyl radical cyclizations for the synthesis of thiosugars has been investigated, and a new free-radical-based methodology for the synthesis of biologically important thiosugars has been develop... Highly Enantioselective Three-Component Direct Mannich Reactions of Unfunctionalized Ketones Catalyzed by Bifunctional Organocatalysts [作者：GUO QUNSHENG; ZHAO JOHN CONGGUI,期刊：Organic Letters, 页码：508-511 , 文章类型： Article，,卷期：2013年15-3] A highly stereoselective three-component direct Mannich reaction between aromatic aldehydes, p-toluenesulfonamide, and unfunctionalized ketones was achieved through an enolate mechanism for the first time with a bifuncti... Ir(I)-Catalyzed Enantioselective Decarboxylative Allylic Etherification: A General Method for the Asymmetric Synthesis of Aryl Allyl Ethers [作者：KIM DONGEUN; REDDY SRINIVASA; SINGH OM V; LEE JAE SEUNG; KONG SUK BIN; HAN HYUNSOO,期刊：Organic Letters, 页码：512-515 , 文章类型： Article，,卷期：2013年15-3] Ir(I)-catalyzed enantioselective decarboxylative allylic etherification of aryl allyl carbonates provides aryl allyl ethers. Key to the generality and high stereoselection of the reaction is the use of the intramolecular... Formal Total Synthesis of Spirangien A [作者：GREGG CLAIRE; GUNAWAN CHRISTIAN; NG AUDREY WEI YI; WIMALA SAMANTHA; WICKREMASINGHE SONALI; RIZZACASA MARK A,期刊：Organic Letters, 页码：516-519 , 文章类型： Article，,卷期：2013年15-3] A formal total synthesis of the spiroketal containing cytotoxic myxobacteria metabolite spirangien A (1) is described. The approach utilizes a late introduction of the C20 alcohol that mirrors the biosynthesis of this co... Ratiometric Fluorescence Detection of Anions by Silanediol-based Receptors Bearing Anthryl and Pyrenyl Groups [作者：KONDO SHINICHI; BIE YI; YAMAMURA MASAKI,期刊：Organic Letters, 页码：520-523 , 文章类型： Article，,卷期：2013年15-3] Two silanediol derivatives bearing 9-anthryl (2) and 1-pyrenyl (3) groups have been developed for fluorescence detection of anions. Receptor 3 showed favorable ratiometric response by fluorescence spectroscopy upon the a... A Bifunctional Lewis Acid Induced Cascade Cyclization to the Tricyclic Core of ent-Kaurenoids and Its Application to the Formal Synthesis of (+/-)-Platensimycin [作者：ZHU LIZHI; HAN YEJIAN; DU GUANGYAN; LEE CHISING,期刊：Organic Letters, 页码：524-527 , 文章类型： Article，,卷期：2013年15-3] A mild and efficient bifunctional Lewis acid induced cascade cyclization reaction has been developed for construction of the tricyclic core of ent-kaurenolds. With ZnBr2 as the bifunctional Lewis acid, a series of substi... Rapid Total Synthesis of (+/-)Trigonoliimine A via a Strecker/Houben-Hoesch Sequence [作者：ZHAO BING; HAO XIAOYAN; ZHANG JIANXIN; LIU SHENG; HAO XIAOJIANG,期刊：Organic Letters, 页码：528-530 , 文章类型： Article，,卷期：2013年15-3] A novel synthetic route to the hexacyclic system of trigonoliimine A was accomplished in four steps from N-phthaloyl 6-OMe-tryptamine. Key reactions include a three-component Strecker-type reaction to fashion the two C-N... Stereoselective Synthesis of 7-epi-Incarvilline [作者：SEO HYOWON; YUN HWAYOUNG; LEE SUJIN; JANG JAEBONG; HAN YOUNG TAEK; KIM DAEDUK; LEE JEEYEON; SUH YOUNGGER,期刊：Organic Letters, 页码：531-533 , 文章类型： Article，,卷期：2013年15-3] The enantioselective synthesis of 7-epi-incarvilline for formal syntheses of (-)-incarvilline, (+)-Incarvine C, and (-)-incarvillateine is described. The key features of our synthesis involve (1) stereoselective construc... Chemically-Responsive Complexation of A Diquaternary Salt with Bis(m-phenylene)-32-Crown-10 Derivatives and Host Substituent Effect on Complexation Geometry [作者：YAN XUZHOU; LI ZHENGTAO; WEI PEIFA; HUANG FEIHE,期刊：Organic Letters, 页码：534-537 , 文章类型： Article，,卷期：2013年15-3] A chemically responsive diquaternary salt with pi-extended surface was made. The host-guest complexation with chemo-responsiveness between three bis(m-phenylene)-32-crown-10 (BMP32C10) derivatives and this diquaternary s... Selective Detection of Dihydrogen Phosphate Anion by Fluorescence Change with Tetraamide-Based Receptors Bearing Isoquinolyl and Quinolyl Moieties [作者：KONDO SHINICHI; TAKAI RYUNOSUKE,期刊：Organic Letters, 页码：538-541 , 文章类型： Article，,卷期：2013年15-3] Novel fluororeceptors 2 and 3 based on tetraamide bearing 1-isoquinolyl and 2-quinolyl moieties were designed and synthesized. Highly selective and significant changes In the UV-vis and fluorescence spectra of the recept... Enantioselective Construction of Oxa- and Aza-Angular Triquinanes through Tandem [4+1]/[3+2] Cycloaddition of Sulfur Ylides and Nitroolefins [作者：AN JING; LU LIANGQIU; YANG QINGQING; WANG TAO; XIAO WENJING,期刊：Organic Letters, 页码：542-545 , 文章类型： Article，,卷期：2013年15-3] A formal [4 + 1]/[3 + 2] cycloaddition sequence of sulfur ylides and alkene-tethered nitroolefins has been developed. The use of (R)-binol-derived chiral sulfide leads to an asymmetric process that allows the constructio... Stereoselective Synthesis of anti-1,3-Aminoalcohols via Reductive Opening of 4-Amidotetrahydropyrans Derived from the Prins/Ritter Sequence [作者：YADAV J S; REDDY Y JAYASUDHAN; REDDY P ADI NARAYANA; REDDY B V SUBBA,期刊：Organic Letters, 页码：546-549 , 文章类型： Article，,卷期：2013年15-3] A novel method has been devised for anti-1,3-aminoalcohols through reductive elimination of iodomethyltetrahydropyrans which are In turn derived from a Prins/Ritter reaction sequence. The synthetic versatility of this me... Nickel-Mediated Inter- and Intramolecular C-S Coupling of Thiols and Thioacetates with Aryl Iodides at Room Temperature [作者：XU XIAOBO; LIU JIAN; ZHANG JIANJIAN; WANG YAWEN; PENG YU,期刊：Organic Letters, 页码：550-553 , 文章类型： Article，,卷期：2013年15-3] A Ni(0)-catalyzed intermolecular cross-coupling of various functionalized thiols and aryl Iodides has been developed and successfully extended to less explored intramolecular versions, where thioacetates could also be ut... Concise Asymmetric Synthesis of Orthogonally Protected syn- and anti-1,3-Aminoalcohols [作者：LEE JAE SEUNG; KIM DONGEUN; LOZANO LUCIA; KONG SUK BIN; HAN HYUNSOO,期刊：Organic Letters, 页码：554-557 , 文章类型： Article，,卷期：2013年15-3] Novel chiral binfunctional reagents V and ent-V undergo asymmetric aldehyde allylation followed by Ir(I)-catalyzed enantioselective allylic amidation to give orthogonally protected syn- and anti-1,3-aminoalcohols with co...