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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92条记录   Diphenylparabanic Acid as a Synthon for the Synthesis of alpha-Diketones and alpha-Ketocarboxylic Acids [作者：WATANABE NOBUKO; HAMAN MITSUTAKA; TODAKA SHOTA; ASAEDA TAKAHIRO; IJUIN HISAKO K; MATSUMOTO MASAKATSU,期刊：Journal of Organic Chemistry, 页码：632-639 , 文章类型： Article，,卷期：2012年77-1] Diphenylparabanic acid was found to react with >2 equiv of organolithiurns at -78 degrees C to effectively give the corresponding symmetrical alpha-diketones. However, upon treatment with 1 equiv of organolithium, the pa... Mechanism of the Acid-Promoted Intramolecular Schmidt Reaction: Theoretical Assessment of the Importance of Lone Pair-Cation, Cation-pi, and Steric Effects in Controlling Regioselectivity [作者：GUTIERREZ OSVALDO; AUBE JEFFREY; TANTILLO DEAN J,期刊：Journal of Organic Chemistry, 页码：640-647 , 文章类型： Article，,卷期：2012年77-1] The mechanism of the acid-catalyzed intramolecular Schmidt reaction of 2-azidopropylcyclohexanones was studied using density functional theory (primarily M06-2X). The reaction was found to proceed through rapid formation... Three-Component Chiral Derivatizing Protocols for NMR Spectroscopic Enantiodiscrimination of Hydroxy Acids and Primary Amines [作者：CHAUDHARI SACHIN RAMA; SURYAPRAKASH N,期刊：Journal of Organic Chemistry, 页码：648-651 , 文章类型： Article，,卷期：2012年77-1] The novel three-component chiral derivatization protocols have been derived for (1)H and (19)F NMR spectroscopic discrimination of a series of chiral hydroxy acids by their coordination and self-assembly with optically a... Total Syntheses of Angelicoin A, Hericenone J, and Hericenol A via Migratory Prenyl- and Geranylation-Aromatization Sequences [作者：CORDES JENS; CALO FREDERICK; ANDERSON KATIE; PFAFFENEDER TONI; LACLEF SYLVAIN; WHITE ANDREW J P; BARRETT ANTHONY G M,期刊：Journal of Organic Chemistry, 页码：652-657 , 文章类型： Article，,卷期：2012年77-1] A five-step synthesis of the natural product angelicoin A using a late stage highly regioselective palladium(0)-catalyzed decarboxylative prenyl migration and aromatization sequence as the key step is reported. The metho... Analysis of the Palladium-Catalyzed (Aromatic)C-H Bond Metalation-Deprotonation Mechanism Spanning the Entire Spectrum of Arenes [作者：GORELSKY SERGE I; LAPOINTE DAVID; FAGNOU KEITH,期刊：Journal of Organic Chemistry, 页码：658-668 , 文章类型： Article，,卷期：2012年77-1] A comprehensive understanding of the C-H bond cleavage step by the concerted metalation-deprotonadon (CMD) pathway is important in further development of cross-coupling reactions using different catalysts. Distortion-int... Replacing Phenyl Ring with Thiophene: An Approach to Longer Wavelength Aza-dipyrromethene Boron Difluoride (Aza-BODIPY) Dyes [作者：ZHANG XINFU; YU HAIBO; XIAO YI,期刊：Journal of Organic Chemistry, 页码：669-673 , 文章类型： Article，,卷期：2012年77-1] In the orignial 1,3,5,7-tetraphenyl aza-BODIPY, replacing the phenyl rings with thiophene achieved significant bathochromic shifts. One of the target molecules, DPDTAB, emitting strong NIR fluorescence with a quantum yie... Titanium(IV)-Promoted Regioselective Nucleophilic Ring-Opening Reaction of Chiral Epoxyallyl Alcohols with Acids as a Tool for Ready Access to Chiral 1,2,3-Triol Monoesters: Application to Stereoselective Total Synthesis of Macrolides [作者：KRISHNA PALAKODETY RADHA; RAMANA D VENKATA,期刊：Journal of Organic Chemistry, 页码：674-679 , 文章类型： Article，,卷期：2012年77-1] Titanium(IV)-promoted regioselective ring-opening reaction of chiral epoxy-allyl alcohols (Sharpless conditions as the key strategic step) is developed as a tool for ready access to chiral 5,6-dihydroxyoct-7-en-4-yl alko... Synthesis of Hexadehydrotribenzo[a,e,i][12]annulenes by Acetylene Insertion into an Open-Chain Precursor [作者：DUDIC MIROSLAV; CISAROVA IVANA; MICHL JOSEF,期刊：Journal of Organic Chemistry, 页码：68-74 , 文章类型： Article，,卷期：2012年77-1] A simple synthesis of a hexadehydrotribenzo[a,e,i][12]annulene by insertion of acetylene into an open-chain diiodo precursor under Sonogashira coupling conditions has been developed and used to prepare a rigid three-arme... Tomentosones A and B, Hexacyclic Phloroglucinol Derivatives from the Thai Shrub Rhodomyrtus tomentosa [作者：HIRANRAT ASADHAWUT; MAHABUSARAKAM WILAWAN; CARROLL ANTHONY R; DUFFY SANDRA; AVERY VICKY M,期刊：Journal of Organic Chemistry, 页码：680-683 , 文章类型： Article，,卷期：2012年77-1] Two phloroglucinols named tomentosones A and B (1 and 2) that each possess a novel hexacyclic ring system were isolated from the CH(2)Cl(2) extract of Rhodomyrtus tomentosa leaves. Their structures were elucidated from a... Structure of Cyclic Nucleoside Phosphonate Ester Prodrugs: An Inquiry [作者：KRYLOV IVAN S; ZAKHAROVA VALERIA M; SERPI MICHAELA; HAIGES RALF; KASHEMIROV BORIS A; MCKENNA CHARLES E,期刊：Journal of Organic Chemistry, 页码：684-689 , 文章类型： Article，,卷期：2012年77-1] The configuration at phosphorus in cyclic (S)-HPMPC (1, cidofovir) and (S)-HPMPA (2) phenyl ester (5 and 6, respectively) diastereomers ((R(p))-5, (R(p))-6, (S(p))-6) was determined by X-ray crystallography and correlate... Asymmetric Synthesis of Sulfinamides Using (-)-Quinine as Chiral Auxiliary [作者：ZHANG YONGDA; CHITALE SAMPADA; GOYAL NAVNEET; LI GUISHENG; HAN ZHENGXU S; SHEN SHERRY; MA SHENGLI; GRINBERG NELU; LEE HEEWON; LU BRUCE Z; SENANAYAKE CHRIS H,期刊：Journal of Organic Chemistry, 页码：690-695 , 文章类型： Article，,卷期：2012年77-1] A process has been designed and demonstrated for the asymmetric synthesis of sulfinamides using quinine as auxiliary. A variety of chiral sulfinamides including N-alkyl sulfinamides with diverse structure were prepared i... Synthesis of 1,2,4,5-Tetrasubstituted Imidazoles by a Sequential Aza-Wittig/Michael/Isomerization Reaction [作者：NIE YIBO; WANG LONG; DING MINGWU,期刊：Journal of Organic Chemistry, 页码：696-700 , 文章类型： Article，,卷期：2012年77-1] Carbodiimides 4, obtained from aza-Wittig reactions of iminophosphorane 3 with aryl isocyanates, reacted with secondary amines in the presence of a catalytic amount of sodium alkoxide to give 1,2,4,5-tetrasubstituted imi... Synthesis of (+)-Ambrisentan via Chiral Ketone-Catalyzed Asymmetric Epoxidation [作者：PENG XIANYOU; LI PEIJUN; SHI YIAN,期刊：Journal of Organic Chemistry, 页码：701-703 , 文章类型： Article，,卷期：2012年77-1] The synthesis of optically pure (+)-ambrisentan has been achieved from 3,3-diphenylacrylate in four steps with 53% overall yield and >99% ee at the >100 g scale without column purification. The chiral epoxide intermediat... Convergent Formal Synthesis of (+/-)-Roseophilin [作者：SONG CHUANJUN; LIU HUI; HONG MEILING; LIU YUANYUAN; JIA FEIFEI; SUN LI; PAN ZHENLIANG; CHANG JUNBIAO,期刊：Journal of Organic Chemistry, 页码：704-706 , 文章类型： Article，,卷期：2012年77-1] A facile convergent synthesis of the tricyclic core 2 of roseophilin is described, which represents the shortest route so far for the formal synthesis of roseophilin. The key step was a tandem pyrrole acylation-Nazarov c... Reaction of Selenium Dioxide with Aromatic Ketones in the Presence of Boron Triflouride Etherate: A Protocol for the Synthesis of Triarylethanones [作者：LALOO BADAKER M; MECADON HORMI; ROHMAN MD RUMUM; KHARBANGAR IADEISHISHA; KHARKONGOR ICYDORA; RAJBANGSHI MANTU; NONGKHLAW RISHANLANG; MYRBOH BEKINGTON,期刊：Journal of Organic Chemistry, 页码：707-712 , 文章类型： Article，,卷期：2012年77-1] An efficient regioselective protocol for the C-C bond formation by the unexpected alpha,alpha-diarylation of aromatic ketones with unactivated arenes in the presence of selenium dioxide and boron trifluoride etherate has... Total Synthesis of Camptothecin and SN-38 [作者：YU SHANBAO; HUANG QINGQING; LUO YU; LU WEI,期刊：Journal of Organic Chemistry, 页码：713-717 , 文章类型： Article，,卷期：2012年77-1] A new practical and concise total synthesis of enantiopure camptothecin and SN-38 (14% overall yield, 99.9% ee and 99.9% purity) was described, starting from inexpensive and readily available materials. The development o...