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66条记录   One-Pot, Two-Step Conversion of Aldehydes to Phosphonyl- and Sulfonylpyrazoles Using Bestmann-Ohira Reagent [作者：KUMAR RAHUL; VERMA DEEPTI; MOBIN SHAIKH M; NAMBOOTHIRI IRISHI N N,期刊：Organic Letters, 页码：4070-4073 , 文章类型： Article，,卷期：2012年14-16] A one-pot, two-step, three-component method for the conversion of commercially available aldehydes to phosphonylpyrazoles has been developed, demonstrating, for the first time, the dual reactivity of the Bestmann-Ohira r... Palladium(II)-Catalyzed Enantio- and Diastereoselective Synthesis of Pyrrolidine Derivatives [作者：JANA RANJAN; PATHAK TEJAS P; JENSEN KATRINA H; SIGMAN MATTHEW S,期刊：Organic Letters, 页码：4074-4077 , 文章类型： Article，,卷期：2012年14-16] A palladium-catalyzed enantio- and diastereoselective synthesis of pyrrolidine derivatives is described. Initial intramolecular nucleopalladation of the tethered protected amine forms the pyrrolidine moiety and a quinone... Noncovalent Organocatalytic Synthesis of Enantioenriched Terminal Aziridines with a Quaternary Stereogenic Center [作者：DE FUSCO CLAUDIA; FUOCO TIZIANA; CROCE GIANLUCA; LATTANZI ALESSANDRA,期刊：Organic Letters, 页码：4078-4081 , 文章类型： Article，,卷期：2012年14-16] A high-yielding and enantioselective access to novel N-Boc terminal aziridines, bearing a quaternary stereogenic center, has been developed via an aza-Michael initiated ring-closure (aza-MIRC) reaction of alpha-acyl acry... A Macrocyclic beta-Iodoallenolate Intermediate Is Key: Synthesis of the ABD Core of Phomactin A [作者：CIESIELSKI JENNIFER; CARIOU KEVIN; FRONTIER ALISON J,期刊：Organic Letters, 页码：4082-4085 , 文章类型： Article，,卷期：2012年14-16] An enantioselective strategy for the synthesis of phomactin natural products is described. The Lewis acid triggered cyclization of a beta-iodoallenolate embedded in a 12-membered macrocycle was used to obtain a highly fu... Palladium-Catalyzed Nitromethylation of Aryl Halides: An Orthogonal Formylation Equivalent [作者：WALVOORD RYAN R; BERRITT SIMON; KOZLOWSKI MARISA C,期刊：Organic Letters, 页码：4086-4089 , 文章类型： Article，,卷期：2012年14-16] An efficient cross-coupling reaction of aryl halides and nitromethane was developed with the use of parallel microscale experimentation. The arylnitromethane products are precursors for numerous useful synthetic products... One-Pot, Three-Component Coupling Approach to the Synthesis of alpha-Iminocarboxamides [作者：MASUI HISASHI; FUSE SHINICHIRO; TAKAHASHI TAKASHI,期刊：Organic Letters, 页码：4090-4093 , 文章类型： Article，,卷期：2012年14-16] A one-pot, three-component coupling was accomplished via the nucleophilic addition of an alkylsamarium(III) species to isocyanides and the subsequent addition of the resultant imidoyl samarium(III) species to isocyanates... Pd-Catalyzed C-H Fluorination with Nucleophilic Fluoride [作者：MCMURTREY KATE B; RACOWSKI JOY M; SANFORD MELANIE S,期刊：Organic Letters, 页码：4094-4097 , 文章类型： Article，,卷期：2012年14-16] The palladium-catalyzed C-H fluorination of 8-methylquinoline derivatives with nucleophilic fluoride is reported. This transformation involves the use of AgF as the fluoride source in combination with a hypervalent iodin... A Practical and General Diels-Alder Reaction of Pentafulvenes with Arynes [作者：BHOJGUDE SACHIN SURESH; KAICHARLA TRINADH; BHUNIA ANUP; BIJU AKKATTU T,期刊：Organic Letters, 页码：4098-4101 , 文章类型： Article，,卷期：2012年14-16] A high-yielding, versatile and practical Diels-Alder reaction of pentafulvenes with arynes under mild reaction conditions is reported. The aryne generated by the fluoride induced 1,2-elimination of 2-(trimethylsilyl)aryl... Ilelic Acids A and B, Two Unusual Triterpenes with a Seven-Membered Ring from Ilex latifolia [作者：WANG CUNQIN; WANG LEI; FAN CHUNLIN; ZHANG DONGMEI; HUANG XIAOJUN; JIANG RENWANG; BAI LIANGLIANG; SHI JUNMIN; WANG YING; YE WENCAI,期刊：Organic Letters, 页码：4102-4105 , 文章类型： Article，,卷期：2012年14-16] Two unusual triterpenes, ilelic acids A (1) and B (2), together with their biosynthetic related compounds ilelic acids C (3) and D (4) were isolated from the leaves of Ilex latifolia. Their structures with absolute confi... A Furantaxane with an Unusual 6/8/6/5 Ring System and Potent Tumor MDR Reversal Activity Obtained via Microbial Transformation [作者：LIU XIAO; XIE DAN; CHEN RIDAO; MEI MEI; ZOU JIANHUA; CHEN XIAOGUANG; DAI JUNGUI,期刊：Organic Letters, 页码：4106-4109 , 文章类型： Article，,卷期：2012年14-16] A furantaxane (4) with an unusual 6/8/6/5 ring system and two hydroxylated products (2, 3) were isolated following the biotransformation of a taxane (1) by Streptomyces griseus. The structures of the isolates were elucid... Oxidative Alkenylation of Aromatic Esters by Ruthenium-Catalyzed Twofold C-H Bond Cleavages [作者：GRACZYK KAROLINA; MA WENBO; ACKERMANN LUTZ,期刊：Organic Letters, 页码：4110-4113 , 文章类型： Article，,卷期：2012年14-16] Cationic ruthenium(II) complexes enabled catalytic twofold C-H bond functionalizations with weakly coordinating aromatic esters in a highly chemo-, site- and diastereo-selective as well as site selective fashion. The oxi... {1,6}-Transannular Catalytic Asymmetric Gosteli-Claisen Rearrangement [作者：JASCHINSKI TOBIAS; HIERSEMANN MARTIN,期刊：Organic Letters, 页码：4114-4117 , 文章类型： Article，,卷期：2012年14-16] The first uncatalyzed and [Cu(R-box)L-2](SbF6)(2)-catalyzed (1,6}-transannular Gosteli-Claisen rearrangement of cyclic 2-alkoxycarbonyl-substituted allyl vinyl ethers to afford medium- and large-sized carbacycles is disc... Efficient Preparation of 2,4-Diaminopyrimidine Nucleosides: Total Synthesis of Lysidine and Agmatidine [作者：KOPINA BRETT J; LAUHON CHARLES T,期刊：Organic Letters, 页码：4118-4121 , 文章类型： Article，,卷期：2012年14-16] An efficient route for the synthesis of 2,4-diaminopyrimidine ribosides from cytidine is described consisting of six steps with overall yields >50% and only one chromatographic step. The key amine addition step utilizes ... Thermoresponsive Shuttling of Rotaxane Containing Trichloroacetate Ion [作者：ABE YOKO; OKAMURA HISASHI; NAKAZONO KAZUKO; KOYAMA YASUHITO; UCHIDA SATOSHI; TAKATA TOSHIKAZU,期刊：Organic Letters, 页码：4122-4125 , 文章类型： Article，,卷期：2012年14-16] A thermoresponsive rotaxane shuttling system was developed with a trichloroacetate counteranion of an ammonium/crown ether-type rotaxane. Chemoselective thermal decomposition of the ammonium trichloroacetate moiety on th... Selective and Effective Binding of Pillar[5,6]arenes toward Secondary Ammonium Salts with a Weakly Coordinating Counteranion [作者：LI CHUNJU; SHU XIAOYAN; LI JIAN; FAN JIAZENG; CHEN ZHENXIA; WENG LINHONG; JIA XUESHUN,期刊：Organic Letters, 页码：4126-4129 , 文章类型： Article，,卷期：2012年14-16] The selective and effective binding of secondary ammoniums with a weakly coordinating tetrakis[3,5-bis(trifluoromethyl)phenyl]borate (BArF) counteranion by per-ethylated pillar[5,6]arenes is reported. The construction of... A General Method for Palladium-Catalyzed Direct Carbonylation of Indole with Alcohol and Phenol [作者：LANG RUI; SHI LIJUN; LI DENGFENG; XIA CHUNGU; LI FUWEI,期刊：Organic Letters, 页码：4130-4133 , 文章类型： Article，,卷期：2012年14-16] A novel strategy involving a first oxidative iodination and subsequent Pd-0-catalyzed carbonylation to yield indole-3-carboxylate has been developed. It showed perfect generality to indole, alcohol, and phenol. The curre...