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61条记录   Cyclocondensation of Amino-propargyl Silanes [作者：WANG YIZHONG; READY JOSEPH M,期刊：Organic Letters, 页码：2308-2311 , 文章类型： Article，,卷期：2012年14-9] Amino-propargyl silanes condense with carbonyl compounds to form imines and subsequently cyclize to form allenylidene tetrahydroquinolines. The cyclocondensations are catalyzed by a variety of Bronsted acids, among which... Palladium-Catalyzed Cyclization Reactions of 2,3-Allenyl Amines with Propargylic Carbonates [作者：YE JUNTAO; LI SUHUA; MA SHENGMING,期刊：Organic Letters, 页码：2312-2315 , 文章类型： Article，,卷期：2012年14-9] A highly efficient and atom-economic route to synthesize 5-(1,3,4-alkatrien-2-yl)oxazolidin-2-ones via palladium-catalyzed cyclization reactions of 2,3-allenyl amines with propargylic carbonates was reported. The CO2 gen... Synthesis, Properties, and OFET Characteristics of 5,5 '-Di(2-azulenyl)-2,2 '-bithiophene (DAzBT) and 2,5-Di(2-azulenyl)-thieno[3,2-b]thiophene (DAzTT) [作者：YAMAGUCHI YUJI; MARUYA YUKIHIRO; KATAGIRI HIROSHI; NAKAYAMA KENICHI; OHBA YOSHIHIRO,期刊：Organic Letters, 页码：2316-2319 , 文章类型： Article，,卷期：2012年14-9] Two azulene-based pi-conjugated systems, 5,5'-di(2-azulenyl)-2,2'-bithiophene and 2,5-di(2-azulenyl)-thieno[3,2-b]thiophene, were constructed via Suzuki-Miyaura cross-coupling reactions. The crystal structures of both re... Concise Total Synthesis of (-)-Mersicarpine [作者：IWAMA YUSUKE; OKANO KENTARO; SUGIMOTO KENJI; TOKUYAMA HIDETOSHI,期刊：Organic Letters, 页码：2320-2322 , 文章类型： Article，,卷期：2012年14-9] A concise total synthesis of (-)-mersicarpine from a known cyclohexanone was accomplished. The azepinoindole core was constructed by a DIBAL-H-mediated reductive ring-expansion reaction of oxime. Synthesis of Polysubstituted Isoquinolines through Cross-Coupling Reactions with alpha-Alkoxytosylhydrazones [作者：FLORENTINO LUCIA; AZNAR FERNANDO; VALDES CARLOS,期刊：Organic Letters, 页码：2323-2325 , 文章类型： Article，,卷期：2012年14-9] A Pd-catalyzed cross-coupling reaction of alpha-alkoxytosylhydrazones with sulfonates derived from salicyl aldehydes gives rise to protected 1,5-dicarbonyl compounds. Treatment with ammonium hydroxide readily transforms ... Palladium-Catalyzed Asymmetric 6-Endo Cyclization of Dienamides with Substituent-Driven Activation [作者：TSUCHIKAWA HIROSHI; MAEKAWA YUYA; KATSUMURA SHIGEO,期刊：Organic Letters, 页码：2326-2329 , 文章类型： Article，,卷期：2012年14-9] Chiral 2-piperidinone compounds with various C-6 substituents were successfully synthesized via a Pd-catalyzed asymmetric 6-endo cyclization of dienamides, which were evidently activated by both N-p-toluenesulfonyl and C... Simple and Efficient Solid-Phase Preparation of Azido-peptides [作者：HANSEN MORTEN B; VAN GURP THEODORUS H M; VAN HEST JAN C M; LOWIK DENNIS W P M,期刊：Organic Letters, 页码：2330-2333 , 文章类型： Article，,卷期：2012年14-9] A shelf-stable and easily prepared diazotransfer reagent, Imidazole-1-sulfonyl azide hydrochloride, was used to transform the N-terminus of a model peptide on solid phase into an azide moiety. It is demonstrated that thi... Dual-Mode Control of PET Process in a Ferrocene-Functionalized [2]Rotaxane with High-Contrast Fluorescence Output [作者：ZHANG HUI; HU JUAN; QU DAHUI,期刊：Organic Letters, 页码：2334-2337 , 文章类型： Article，,卷期：2012年14-9] The shuttling motion of the ferrocene-functionalized macrocycle between the dibenzylammonium and the N-methyltriazolium recognition sites in a bistable [2]rotaxane, as well as the photoinduced electron transfer process o... Nucleophile- or Light-Induced Synthesis of 3-Substituted Phthalides from 2-Formylarylketones [作者：GERBINO DARIO C; AUGNER DANIEL; SLAVOV NIKOLAY; SCHMALZ HANSGUENTHER,期刊：Organic Letters, 页码：2338-2341 , 文章类型： Article，,卷期：2012年14-9] The surprisingly facile conversion (isomerization) of 2-formyl-arylketones into 3-substituted phthalides, as observed for the marine natural product pestalone and its per-O-methylated derivative, was investigated using a... Multinuclear Cu-Catalysts Based on SPINOL-PHOS in Asymmetric Conjugate Addition of Organozinc Reagents [作者：ENDO KOHEI; HAMADA DAISUKE; YAKEISHI SAYURI; OGAWA MIKA; SHIBATE TAKANORI,期刊：Organic Letters, 页码：2342-2345 , 文章类型： Article，,卷期：2012年14-9] Multinuclear Cu/Zn complex-catalyzed efficient asymmetric conjugate addition of organozinc reagents to acyclic and cyclic enones has been developed in the presence of a wide variety of regioisomeric chiral diols bearing ... Stereoselective Synthesis of the Macrolactone Core of (+)-Neopeltolide [作者：RAGHAVAN SADAGOPAN; SAMANTA PRADIP KUMAR,期刊：Organic Letters, 页码：2346-2349 , 文章类型： Article，,卷期：2012年14-9] A stereoselective synthesis of the macrolactone core of the potent anticancer agent neopeltolide is disclosed. The key steps of the synthesis include asymmetric allylation using Krische' protocol, conjugate reduction usi... Asymmetric Synthesis of Chiral 9,10-Dihydrophenanthrenes Using Pd-Catalyzed Asymmetric Intramolecular Friedel-Crafts Allylic Alkylation of Phenols [作者：SUZUKI YUTA; NEMOTO TETSUHIRO; KAKUGAWA KAZUMI; HAMAJIMA AKINARI; HAMADA YASUMASA,期刊：Organic Letters, 页码：2350-2353 , 文章类型： Article，,卷期：2012年14-9] We developed a novel asymmetric synthetic method for multisubstituted 9,10-dihydrophenanthrenes based on the Pd-catalyzed asymmetric intramolecular Friedel-Crafts allylic alkylation of phenols, which produces 10-vinyl or... Lewis Base Promoted Intramolecular Acylcyanation of alpha-Substituted Activated Alkenes: Construction of Ketones Bearing beta-Quaternary Carbon Centers [作者：ZHUANG ZHE; CHEN JIANMING; PAN FENG; LIAO WEIWEI,期刊：Organic Letters, 页码：2354-2357 , 文章类型： Article，,卷期：2012年14-9] A novel phosphine-promoted intramolecular acylcyanation of alpha-substituted activated alkenes has been developed, which provides a unique access to densely functionalized acyclic ketones bearing beta-quaternary carbon c... 1,2,3-Triazole: Unique Ligand in Promoting Iron-Catalyzed Propargyl Alcohol Dehydration [作者：YAN WUMING; YE XIAOHAN; AKHMEDOV NOVRUZ G; PETERSEN JEFFREY L; SHI XIAODONG,期刊：Organic Letters, 页码：2358-2361 , 文章类型： Article，,卷期：2012年14-9] A 1,2,3-traizole-promoted Iron(III)-catalyzed propargyl alcohol dehydration was developed for the synthesis of conjugated enynes. The desired conjugated enynes were prepared in good to excellent yields (up to 95%) with a... Mn-promoted Aerobic Oxidative C-C Bond Cleavage of Aldehydes with Dioxygen Activation: A Simple Synthetic Approach to Formamides [作者：ZHANG CHUN; XU ZEJUN; SHEN TAO; WU GUOLIN; ZHANG LIANGREN; JIAO NING,期刊：Organic Letters, 页码：2362-2365 , 文章类型： Article，,卷期：2012年14-9] A novel Mn-promoted aerobic oxidative C-C bond cleavage of aldehydes with dioxygen activation has been developed. The usage of molecular oxygen (1 atm) as oxidant, reactant, and an initiator to trigger this transformatio... Enantioselective Synthesis of the C1-C6 and C7-C23 Fragments of the Proposed Structure of Iriomoteolide 1a [作者：CRIMMINS MICHAEL T; DECHERT ANNEMARIE R,期刊：Organic Letters, 页码：2366-2369 , 文章类型： Article，,卷期：2012年14-9] Synthesis of the C1-C6 and C7-C23 fragments of the proposed structure of Iriomoteolide 1a has been accomplished. Key steps include a cross metathesis to form the C15-C16 E olefin and a chelation controlled Grignard addit...