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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33条记录   Total Synthesis of (+)-Psymberin (Irciniastatin A): Catalytic Reagent Control as the Strategic Cornerstone. [作者：Smith, Amos B., III;Jurica, Jon A.;Walsh, Shawn P.;,期刊：Organic Letters, 页码：5625-5628 , 文章类型： 研究论文，,卷期：2008年10-24] An effective total synthesis of the marine sponge cytotoxin (+)-psymberin [irciniastatin A (I)] has been achieved. Highlights of the strategy include a Diels-Alder reaction between a bis-siloxy diene and an allene to co... Ainsliatrimers A and B, the first two guaianolide trimers from Ainsliaea fulvioides. [作者：Wang, Yan;Shen, Yun-Heng;Jin, Hui-Zi;Fu, Jian-Jun;Hu, Xiao-Jia;Qin, Jiang-Jiang;Liu, Jian-Hua;Chen, Ming;Yan, Shi-Kai;Zhang, Wei-Dong;,期刊：Organic Letters, 页码：5517-5520 , 文章类型： 研究论文，,卷期：2008年10-24] related sesquiterpene dimer ainsliadimer B (3), were isolated from the aerial part of Ainsliaea fulvioides. . Their structures were elucidated by spectroscopic techniques, including X-ray crystal diffraction. Both I an... Marineosins A and B, cytotoxic spiroaminals from a marine-derived actinomycete. [作者：Boonlarppradab, Chollaratt;Kauffman, Christopher A.;Jensen, Paul R.;Fenical, William;,期刊：Organic Letters, 页码：5505-5508 , 文章类型： 研究论文，,卷期：2008年10-24] sediment-derived actinomycete related to the genus Streptomyces. The marineosins, which appear to be derived from unknown modifications of prodigiosin-like pigment pathways, showed significant inhibition of human colon c... Tandem Silylformylation-Crotylsilylation/Tamao Oxidation of Internal Alkynes: A Remarkable Example of Generating Complexity from Simplicity. [作者：Spletstoser, Jared T.;Zacuto, Michael J.;Leighton, James L.;,期刊：Organic Letters, 页码：5593-5596 , 文章类型： 研究论文，,卷期：2008年10-24] The Rh-catalyzed tandem silylformylation-crotylsilylation reaction was extended to include internal alkynes. Tamao oxidn. of the initial product gives a substituted enol, which undergoes highly diastereoselective tautom... Antiaromaticity in Distal Bisfluorenyl Dications Separated by Multiple Discrete Spacer Units. [作者：Dahl, Bart J.;Mills, Nancy S.;,期刊：Organic Letters, 页码：5605-5608 , 文章类型： 研究论文，,卷期：2008年10-24] The effect of spacers on the antiaromaticity of bisfluorenyl dications was examd. For systems such as 4a-c in which extensive delocalization of the pos. charge through the p-system is not possible, a relationship based ... Chromofluorescent probes for selective detection of fluoride and acetate ions. [作者：Kumar, Subodh;Luxami, Vijay;Kumar, Ashwani;,期刊：Organic Letters, 页码：5549-5552 , 文章类型： 研究论文，,卷期：2008年10-24] Chromofluorescent probe I (R= benzyl, X=Cl) was developed for selective and ratiometric estn. of F- (CH3CN) ions. The presence of a lipophilic dodecyl appendage at imidazolium nitrogen in I (R=dodecyl, X=Br) successfull... A Reversible Luminescent Lanthanide Switch Based on a Dibenzo[24]-Crown-8-Dipicolinic Acid Conjugate. [作者：Han, Min;Zhang, Heng-Yi;Yang, Li-Xu;Jiang, Qiao;Liu, Yu;,期刊：Organic Letters, 页码：5557-5560 , 文章类型： 研究论文，,卷期：2008年10-24] A novel host mol. (I) bearing a dibenzo[24]-crown-8 moiety and a dipicolinic acid group was synthesized, and its Tb3+ complex displayed a satisfactory luminescent emission. The tris[2]pseudorotaxane formed from [TbL3]3-... Syntheses of the P-methylase substrates of the bialaphos biosynthetic pathway. [作者：Xiao, Youli;Lee, Kent;Liu, Pinghua;,期刊：Organic Letters, 页码：5521-5524 , 文章类型： 研究论文，,卷期：2008年10-24] N-AcDMPTT) is the substrate for the P-methylation reaction in the biosynthesis of phosphinothricin tripeptide (PTT), which is widely used as an herbicide. To study the mechanism for this unique P-methylation reaction ca... Efficient Synthesis of an a(2,9) Trisialic Acid by One-Pot Glycosylation and Polymer-Assisted Deprotection. [作者：Tanaka, Hiroshi;Tateno, Yusuke;Nishiura, Yuji;Takahashi, Takashi;,期刊：Organic Letters, 页码：5597-5600 , 文章类型： 研究论文，,卷期：2008年10-24] An efficient synthesis of a(2,9) trisialic acid has been achieved via one-pot glycosylation and polymer-assisted deprotection. The synthesis involves chemo- and regioselective a-sialylation of ethylthiosialoside with th... Base-Catalyzed Diels-Alder Reactions of 2H-Pyran-2,5-diones: A Mild Approach to Basiliolide B. [作者：Zhou, Xiongfei;Wu, Wanqing;Liu, Xiaozu;Lee, Chi-Sing;,期刊：Organic Letters, 页码：5525-5528 , 文章类型： 研究论文，,卷期：2008年10-24] A new class of base-catalyzed Diels-Alder reactions of 2H-pyran-2,5-diones has been developed using catalytic amt. of dicyclohexylmethylamine in tert-Bu alc. This method has been successfully employed for construction o... Diastereoselective Oxidative Carbon-Carbon Bond Formation via Silyl Bis-enol Ethers. [作者：Avetta, Christopher T., Jr.;Konkol, Leah C.;Taylor, Carla N.;Dugan, Karen C.;Stern, Charlotte L.;Thomson, Regan J.;,期刊：Organic Letters, 页码：5621-5624 , 文章类型： 研究论文，,卷期：2008年10-24] Diisopropylsilyl bis-enol ethers are shown to be powerful intermediates for the diastereoselective dimerization and cross-coupling of cyclic ketones. The trends obsd. for the oxidative coupling of a range of different d... In Situ "Click" Assembly of Small Molecule Matrix Metalloprotease Inhibitors Containing Zinc-Chelating Groups. [作者：Hu, Mingyu;Li, Junqi;Yao, Shao Q.;,期刊：Organic Letters, 页码：5529-5531 , 文章类型： 研究论文，,卷期：2008年10-24] A panel of small mol.-based MMP inhibitors contg. rhodanine warheads was assembled using "one-pot" click chem. Upon biol. screening, moderate inhibitors were identified which specifically target MMP-7 and MMP-13 over ot... Fluoroalkylation of Imidazoles by Hypervalent Iodonium Salts. [作者：Lu, Changqing;VanDerveer, Don;DesMarteau, Darryl D.;,期刊：Organic Letters, 页码：5565-5568 , 文章类型： 研究论文，,卷期：2008年10-24] N-1H,1H-Perfluoroalkylation and regioselective C-perfluoroalkylation of imidazoles were obtained using the corresponding hypervalent iodonium salts. E.g., reaction of 1-methylimidazole with CF3CH2I(C6H5)N(SO2CF3)2 gave ... Substrate Encapsulation: An Efficient Strategy for the RCM Synthesis of Unsaturated e-Lactones. [作者：Pentzer, Emily B.;Gadzikwa, Tendai;Nguyen, SonBinh T.;,期刊：Organic Letters, 页码：5613-5615 , 文章类型： 研究论文，,卷期：2008年10-24] A facile substrate-encapsulated RCM-based synthesis of 7-membered lactones is reported. Coordination of the a,w-dienyl ester precursor to the bulky Lewis acid (LA) aluminum tris(2,6-diphenylphenoxide) (ATPH) provides a ... Matching the Chirality of Monodentate N-Heterocyclic Carbene Ligands: A Case Study on Well-Defined Palladium Complexes for the Asymmetric a-Arylation of Amides. [作者：Luan, Xinjun;Mariz, Ronaldo;Robert, Carine;Gatti, Michele;Blumentritt, Sascha;Linden, Anthony;Dorta, Reto;,期刊：Organic Letters, 页码：5569-5572 , 文章类型： 研究论文，,卷期：2008年10-24] N-Heterocyclic carbene ligands derived from C2-sym. diamines with naphthyl side chains are introduced as chiral monodentate ligands, and their palladium complexes (NHC)Pd(cin)Cl are prepd. These compds. exist as a mixt.... Consecutive Alkene Cross-Metathesis/Oxonium Ylide Formation-Rearrangement: Synthesis of the Anti-HIV Agent Hyperolactone C. [作者：Hodgson, David M.;Angrish, Deepshikha;Erickson, Stephanie P.;Kloesges, Johannes;Lee, Caroline H.;,期刊：Organic Letters, 页码：5553-5556 , 文章类型： 研究论文，,卷期：2008年10-24] a-Diazo-b-ketoesters bearing allylic ether functionality undergo highly stereoselective Ru-carbene-catalyzed alkene cross-metathesis followed by Rh2(OAc)4-catalyzed oxonium ylide formation/[2,3] sigmatropic rearrangement...