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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57条记录   An Asymmetric Hydrogenation Route To (-)-Spongidepsin [作者：ZHU YE; LOUDET AURORE; BURGESS KEVIN,期刊：Organic Letters, 页码：4392-4395 , 文章类型： Article，,卷期：2010年12-19] (-)-Spongidepsin 1, a cytotoxic marine natural product, was prepared via two iridium-catalyzed hydrogenation reactions; both were highly stereoselective, giving convenient access to pivotal intermediates. This synthesis ... Gold(I)-Catalyzed Cyclization of beta-Allenylhydrazones: An Efficient Synthesis of Multisubstituted N-Aminopyrroles [作者：BENEDETTI ERICA; LEMIERE GILLES; CHAPELLET LAURELISE; PENONI ANDREA; PALMISANO GIOVANNI; MALACRIA MAX; GODDARD JEANPHILIPPE; FENSTERBANK LOUIS,期刊：Organic Letters, 页码：4396-4399 , 文章类型： Article，,卷期：2010年12-19] The gold(I)-catalyzed cycloisomerization of beta-allenylhydrazones provides an efficient access to multisubstituted N-aminopyrroles, which are obtained in good to excellent yields. This new intramolecular cyclization met... Enantiopure 1,2-Bis(tert-butylmethylphosphino)benzene as a Highly Efficient Ligand in Rhodium-Catalyzed Asymmetric Hydrogenation [作者：TAMURA KEN; SUGIYA MASASHI; YOSHIDA KAZUHIRO; YANAGISAWA AKIRA; IMAMOTO TSUNEO,期刊：Organic Letters, 页码：4400-4403 , 文章类型： Article，,卷期：2010年12-19] An electron-rich P-stereogenic bisphosphine ligand named "BenzP(star)" was conveniently prepared from o-dibromobenzene and enantiopure tert-butylmethylphosphine-borane. Its rhodium complex exhibited excellent enantiosele... Scaparvin A, A Novel Caged cis-Clerodane with an Unprecedented C-6/C-11 Bond, and Related Diterpenoids from the Liverwort Scapania parva [作者：GUO DONGXIAO; ZHU RONGXIU; WANG XIAONING; WANG LINING; WANG SHUQI; LIN ZHAOMIN; LOU HONGXIANG,期刊：Organic Letters, 页码：4404-4407 , 文章类型： Article，,卷期：2010年12-19] A novel caged cis-clerodane diterpenoid, scaparvin A, possessing an unprecedented C-6/C-11 bond and a ketal ring, as well as four new cis-clerodane derivatives, scaparvins B-E, were isolated from the Chinese liverwort Sc... Copper-Catalyzed Nitrogen Loss of Sulfonylhydrazones: A Reductive Strategy for the Synthesis of Sulfones from Carbonyl Compounds [作者：FENG XINGWEN; WANG JIAN; ZHANG JI; YANG JING; WANG NA; YU XIAOQI,期刊：Organic Letters, 页码：4408-4411 , 文章类型： Article，,卷期：2010年12-19] An efficient method for the synthesis of sulfones via nitrogen loss of sulfonyl hydrazones is described. The reaction was performed in the presence of simple copper salt and base by utilization of sulfonyl hydrazones, wh... Efficient Synthesis of a Small Molecule, Nonpeptide Inhibitor of LFA-1 [作者：WANG XIAOJUN; XU YIBO; ZHANG LI; KRISHNAMURTHY DHILEEPKUMAR; WIRTH THOMAS; NICOLA THOMAS; SENANAYAKE CHRIS H,期刊：Organic Letters, 页码：4412-4415 , 文章类型： Article，,卷期：2010年12-19] A three-stage process for the synthesis of LFA-1 inhibitor 1 from amine 4 with an overall yield of 65% is described. The key stage involves a Ph3PCl2-induced dehydration/cyclization of urea 6 followed by a regioselective... Enantioselective Total Synthesis of Spirofungins A and B [作者：CRIMMINS MICHAEL T; OBRYAN ELIZABETH A,期刊：Organic Letters, 页码：4416-4419 , 文章类型： Article，,卷期：2010年12-19] The enantioselective total synthesis of spirofungins A (1) and B (2) is reported in 14 steps over the longest linear sequence. Key steps include the use of thiazolidinethione-mediated aldol reactions to assemble the majo... Efficient Synthetic Approach to Potent Antiproliferative Agent Hippuristanol via Hg(II)-Catalyzed Spiroketalization [作者：RAVINDAR KONTHAM; REDDY MADDI SRIDHAR; LINDQVIST LISA; PELLETIER JERRY; DESLONGCHAMPS PIERRE,期刊：Organic Letters, 页码：4420-4423 , 文章类型： Article，,卷期：2010年12-19] The steroidal natural product hippuristanol targets eukaryotic translation initiation factor (eIF)4A which plays a pivotal role in translation in eukaryotic cells. Now an efficient synthesis of hippuristanol from 11-keto... Dinaphthoporphycenes [作者：ROZNYATOVSKIY VLADIMIR; LYNCH VINCENT; SESSLER JONATHAN L,期刊：Organic Letters, 页码：4424-4427 , 文章类型： Article，,卷期：2010年12-19] Naphthobipyrrole is a potentially useful building block for porphyrin and porphyrin analogue synthesis. Reported here is a simple, generalizable synthetic route to alpha-formylated, beta-substituted naphthobipyrroles and... One-Pot Desulfurative-Fluorination-Bromination. Synthesis of 2,5-Dibromo-3-(1,1-difluoroalkyl)thiophenes [作者：TURKMAN NASHAAT; AN LINGLING; POMERANTZ MARTIN,期刊：Organic Letters, 页码：4428-4430 , 文章类型： Article，,卷期：2010年12-19] A unique one-pot, high-yield desulfurative fluorination bromination reaction which leads to the synthesis of 2,5-dibromo-3-(1,1-difluoroalkyl)thiophenes is reported. A single dithiolane reactant can be used to produce bo... Site-Selective Modification of Vitamin D Analogue (Deltanoid) through a Resin-Based Version of Organoselenium 2,3-Sigmatropic Rearrangement [作者：XU WEIMING; HE JUN; YU MINQIANG; SHEN GUOXIANG,期刊：Organic Letters, 页码：4431-4433 , 文章类型： Article，,卷期：2010年12-19] A site-selective modification of a vitamin D analogue (Deltanoid) through a two-step 2,3-sigmatropic rearrangement of organoselenium resin to prepare the key intermediate of calcipotriol has been developed. The polystyre... Transition-Metal-Free Catalytic Synthesis of 1,5-Diaryl-1,2,3-triazoles [作者：KWOK SEN W; FOTSING JOSEPH R; FRASER REBECCA J; RODIONOV VALENTIN O; FOKIN VALERY V,期刊：Organic Letters, 页码：4217-4219 , 文章类型： Article，,卷期：2010年12-19] 1,5-Diarylsubstituted 1,2,3-triazoles are formed in high yield from aryl azides and terminal alkynes in DMSO in the presence of catalytic tetraalkylammonium hydroxide. The reaction is experimentally simple, does not requ... Acetoacetanilides as Masked Isocyanates: Facile and Efficient Synthesis of Unsymmetrically Substituted Ureas [作者：WEI YING; LIU JING; LIN SHAOXIA; DING HONGQIAN; LIANG FUSHUN; ZHAO BAOZHONG,期刊：Organic Letters, 页码：4220-4223 , 文章类型： Article，,卷期：2010年12-19] A general and practical method for the preparation of unsymmetrically substituted ureas has been developed. By the reactions of acetoacetanilides with various amines including primary/secondary amines, a series of substi... Total Synthesis of Rhazinilam: Axial to Point Chirality Transfer in an Enantiospecific Pd-Catalyzed Transannular Cyclization [作者：GU ZHENHUA; ZAKARIAN ARMEN,期刊：Organic Letters, 页码：4224-4227 , 文章类型： Article，,卷期：2010年12-19] A total synthesis of rhazinilam based on a transannular cyclization strategy is described. Using a Heck reaction, the axial chirality of a halogenated 13-membered lactam can be exploited to create the quaternary chiral s... C-3-Symmetric Cage-like Receptors: Chiral Discrimination of alpha-Chiral Amines in a Confined Space [作者：SAMBASIVAN SUNDERRAMAN; KIM SUNGGON; CHOI SUN MI; RHEE YOUNG MIN; AHN KYO HAN,期刊：Organic Letters, 页码：4228-4231 , 文章类型： Article，,卷期：2010年12-19] Cage-like receptors that have internal binding sites and a C-3-symmetric chiral bias have been synthesized, and their chiral discrimination behavior toward alpha-chiral amines as their ammonium salts has been compared wi... Imidazole-Catalyzed Monoacylation of Symmetrical Diamines [作者：VERMA SANJEEV K; ACHARYA B N; KAUSHIK M P,期刊：Organic Letters, 页码：4232-4235 , 文章类型： Article，,卷期：2010年12-19] An imidazole-catalyzed protocol for monoacylation of symmetrical diamines has been developed. The protocol gave selective monoacylation of aliphatic (cyclic and acyclic) primary and secondary diamines. In the reaction, i...