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50条记录   Synthesis of the C1-C26 Hexacyclic Subunit of Pectenotoxin 2 [作者：KUBO OZORA; CANTERBURY DANIEL P; MICALIZIO GLENN C,期刊：Organic Letters, 页码：5748-5751 , 文章类型： Article，,卷期：2012年14-22] Synthesis of the C1-C26 hexacyclic subunit of pectenotoxin-2 (PTX-2) is described that features a stereoselective annulation to generate the C-ring by triple asymmetric Nozaki Hiyama Kishi coupling followed by oxidative ... Noninnocent Role of N-Methyl Pyrrolidinone in Thiazolidinethione-Promoted Asymmetric Aldol Reactions [作者：SREENITHYA A; SUNOJ RAGHAVAN B,期刊：Organic Letters, 页码：5752-5755 , 文章类型： Article，,卷期：2012年14-22] The origin of stereoselectivity in the reaction between a.-azido titanium enolate derived from chiral auxiliary N-acyl thiazolidinethione and benzaldehyde is established using the DFT(B3LYP) method. A nonchelated transit... Palladacycle-Catalyzed Reaction of Bicyclic Alkenes with Terminal Ynones: Regiospecific Synthesis of Polysubstituted Furans [作者：GE GUANGCUN; MO DONGLIANG; DING CHANGHUA; DAI LIXIN; HOU XUELONG,期刊：Organic Letters, 页码：5756-5759 , 文章类型： Article，,卷期：2012年14-22] A new synthetic strategy to access polysubstituted furans regiospecifically has been developed using simple bicyclic alkenes and terminal ynones as starting materials with palladacycles as unique active catalysts. A rati... Inhibiting the Protein Ubiquitination Cascade by Ubiquitin-Mimicking Short Peptides [作者：ZHAO BO; CHOI CHAN HEE J; BHURIPANYO KARAN; VILLHAUER ERIC B; ZHANG KEYA; SCHINDELIN HERMANN; YIN JUN,期刊：Organic Letters, 页码：5760-5763 , 文章类型： Article，,卷期：2012年14-22] Short heptapeptides were identified to function as ubiquitin (UB) mimics that are activated by El and form thioester conjugates with E1, E2, and HECT type E3 enzymes. The activities (k(cat)/K-1/2)of E1 with the UB-mimick... 1,4-Diamination of Cyclic Dienes via a (4+3) Cycloaddition of Diaza-allyl Cationic Intermediates [作者：JEFFREY CHRISTOPHER S; ANUMANDLA DEVENDAR; CARSON CHRISTOPHER R,期刊：Organic Letters, 页码：5764-5767 , 文章类型： Article，,卷期：2012年14-22] Diaza-(4 + 3) cycloadditions of putative diaza-oxyallyl cationic intermediates and cyclic dienes are reported as a method for the 1,4-diamination of cyclic dienes. This reaction was entirely selective for diamination and... New Antifeedant C-20 Terpenoids from Leucosceptrum canum [作者：LUO SHIHONG; HUA JUAN; LI CHUNHUAN; JING SHUXI; LIU YAN; LI XIAONIAN; ZHAO XU; LI SHENGHONG,期刊：Organic Letters, 页码：5768-5771 , 文章类型： Article，,卷期：2012年14-22] Three novel C-20 terpenoids, norleucosceptroids A-C (1-3), were isolated from the leaves and flowers of Leucosceptrum canum (Labiatae) and were identified by comprehensive spectroscopic analysis and, in the case of 1, si... Importance of Secondary Interactions in Twisted Doubly Hydrogen Bonded Complexes [作者：LI JIAXIN; PANDELIEVA ANTONIA T; ROWLEY CHRISTOPHER N; WOO TOM K; WISNER JAMES A,期刊：Organic Letters, 页码：5772-5775 , 文章类型： Article，,卷期：2012年14-22] Three model hydrogen bond arrays that form complexes with large twist angles between their heterocyclic rings were synthesized differing only in the sequence of their hydrogen bond donors and acceptors. The complementary... Base-Catalyzed Efficient Tandem [3+3] and [3+2+1] Annulation-Aerobic Oxidative Benzannulations [作者：DIALLO ABOUBACAR; ZHAO YULONG; WANG HE; LI SHASHA; REN CHUANQING; LIU QUN,期刊：Organic Letters, 页码：5776-5779 , 文章类型： Article，,卷期：2012年14-22] An efficient synthesis of substituted benzenes via a base-catalyzed [3 + 3] aerobic oxidative aromatization of alpha,beta-unsaturated carbonyl compounds with dimethyl glutaconate was reported. All the reactions were carr... Asymmetric beta-Boration of alpha,beta-Unsaturated N-Acyloxazolidinones by [2.2]Paracyclophane-Based Bifunctional Catalyst [作者：ZHAO LEI; MA YUDAO; DUAN WENZENG; HE FUYAN; CHEN JIANQIANG; SONG CHUN,期刊：Organic Letters, 页码：5780-5783 , 文章类型： Article，,卷期：2012年14-22] An efficient copper-catalyzed asymmetric conjugate boration has been achieved by exploiting a new planar and central chiral bicyclic triazolium ligand. This protocol was highly efficient and gave a variety of chiral seco... Synthesis of the Peptaibol Framework of the Anticancer Agent Culicinin D: Stereochemical Assignment of the AHMOD Moiety [作者：HUNG KUOYUAN; HARRIS PAUL W R; BRIMBLE MARGARET A,期刊：Organic Letters, 页码：5784-5787 , 文章类型： Article，,卷期：2012年14-22] The postulated structure of the potent anticancer peptaibol culicinin D has been synthesized using Fmoc-based solid-phase peptide synthesis (SPPS). Comparison of the H-1 NMR data for the reported structure of culicinin D... InCl3/Me3SiCl-Catalyzed Direct Michael Addition of Enol Acetates to alpha,beta-Unsaturated Ketones [作者：ONISHI YOSHIHARU; YONEDA YUKI; NISHIMOTO YOSHIHIRO; YASUDA MAKOTO; BABA AKIO,期刊：Organic Letters, 页码：5788-5791 , 文章类型： Article，,卷期：2012年14-22] The direct Michael addition of enol acetates to alpha,beta-unsaturated ketones was achieved using a combination of Lewis acid catalysts, InCl3 and Me3SiCl, which furnished stable enol-form products that could be further ... A Sequential Pd/Norbornene-Catalyzed Process Generates o-Biaryl Carbaldehydes or Ketones via a Redox Reaction or 6H-Dibenzopyrans by C-O Ring Closure [作者：MOTTI ELENA; DELLA CA NICOLA; XU DI; PIERSIRNONI ANNA; BEDOGNI ELENA; ZHOU ZHIMING; CATELLANI MARTA,期刊：Organic Letters, 页码：5792-5795 , 文章类型： Article，,卷期：2012年14-22] o-Biaryl carbaldeydes and ketones are obtained through the one-pot reaction of o-aryl iodides with o-bromobenzyl alcohols under the catalytic action of Pd and norbornene, in the presence of a base. The same reaction can ... Intramolecular Schmidt Reaction of Acyl Chlorides with Alkyl Azides: Rapid Access to Fused Polycyclic Nitrogen-Containing Heterocycles via a Multistep One-Pot Transformation [作者：GU PEIMING; KANG XIAOYAN; SUN JIAN; WANG BAOJUAN; YI MING; LI XUEQIANG; XUE PING; LI RUI,期刊：Organic Letters, 页码：5796-5799 , 文章类型： Article，,卷期：2012年14-22] The first intramolecular Schmidt reaction of acyl chlorides with alkyl azides has been developed. In this one-pot conversion, an omega-azido hydrocinnamic acid is converted to a tricyclic lactam. The most important featu... Asymmetric Total Synthesis of an Iboga-Type Indole Alkaloid, Voacangalactone, Newly Isolated from Voacanga africana [作者：HARADA MASAYA; ASABA KEN NUNETTSU; IWAI MASUMI; KOGURE NORIYUKI; KITAJIMA MARIKO; TAKAYAMA HIROMITSU,期刊：Organic Letters, 页码：5800-5803 , 文章类型： Article，,卷期：2012年14-22] A new hexacyclic iboga-type indole alkaloid, voacangalactone (1), was isolated from Voacanga africana, and its structure including the absolute configuration was established by asymmetric total synthesis involving such k... Pd-Catalyzed Imine Cyclization: Synthesis of Antimalarial Natural Products Aplidiopsamine A, Marinoquinoline A, and Their Potential Hybrid NCLite-M1 [作者：MAHAJAN JYOTI P; SURYAWANSHI YOGESHWAR R; MHASKE SANTOSH B,期刊：Organic Letters, 页码：5804-5807 , 文章类型： Article，,卷期：2012年14-22] Palladium-catalyzed cyclization of imines has been developed to construct the extremely rare 3H-pyrrolo[2,3-c]quinoline ring system for diversity oriented first total synthesis of antimalarial marine natural product Apli... Biomimetic Synthesis and Biological Evaluation of Aplidiopsamine A [作者：PANARESE JOSEPH D; LINDSLEY CRAIG W,期刊：Organic Letters, 页码：5808-5810 , 文章类型： Article，,卷期：2012年14-22] The first total synthesis of Aplidiopsamine A, a rare 3H-pyrrolo[2,3-c]quinoline alkaloid from the Aplidiopsis confluata, has been achieved following the proposed biosynthesis. This biomimetic synthesis requires only fiv...