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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64条记录   Formal Synthesis of (?-Roseophilin. [作者：Bitar, Abdallah Y.;Frontier, Alison J.;,期刊：Organic Letters, 页码：49-52 , 文章类型： 研究论文，,卷期：2009年11-1] N-tosylpyrrole I gives a 5,5'-fused ketopyrrole, and ansa-bridge formation via p-allyl palladium macrocyclization gives II. Synthesis and Biological Evaluation of a 5-6-5 Imidazole-Phenyl-Thiazole Based a-Helix Mimetic. [作者：Cummings, Christopher G.;Ross, Nathan T.;Katt, William P.;Hamilton, Andrew D.;,期刊：Organic Letters, 页码：25-28 , 文章类型： 研究论文，,卷期：2009年11-1] The development of small mols. that disrupt protein-protein interactions is a key goal in addressing a no. of disease states. The a-helix is commonly found at protein interaction interfaces and has been the focus of sub... Two-Directional Olefinic-Ester Ring-Closing Metathesis using Reduced Ti Alkylidenes. A Rapid Entry into Polycyclic Ether Skeletons. [作者：Zhang, Yuan;Rainier, Jon D.;,期刊：Organic Letters, 页码：237-239 , 文章类型： 研究论文，,卷期：2009年11-1] described. Regioselective synthesis of tetrasubstituted pyrroles by 1,3-dipolar cycloaddition and spontaneous decarboxylation. [作者：Kim, Yongju;Kim, Jonghoon;Park, Seung Bum;,期刊：Organic Letters, 页码：17-20 , 文章类型： 研究论文，,卷期：2009年11-1] We developed a regioselective synthesis of tetrasubstituted pyrroles via the classic 1,3-dipolar cycloaddn. of a,b-unsatd. benzofuran-3(2H)-one and azlactones followed by spontaneous decarboxylation. The complete regioc... One-Pot Tandem Double-Aldol Reaction/Aza-Addition of Acetylacetamides and o-Phthalaldehyde Leading to Spiroindan-2,2'-pyrrolidines. [作者：Cheng, Xin;Liang, Fushun;Shi, Fan;Zhang, Lei;Liu, Qun;,期刊：Organic Letters, 页码：93-96 , 文章类型： 研究论文，,卷期：2009年11-1] A novel domino reaction based on o-phthalaldehyde and 3-oxo-N-arylbutanamides was developed to allow one-pot and efficient prepn. of structurally complex spiro[indan-pyrrolidines], e.g. I and II, with complete regioselec... Bifunctional Phosphine-Catalyzed Domino Reaction: Highly Stereoselective Synthesis of cis-2,3-Dihydrobenzofurans from Salicyl N-Thiophosphinyl Imines and Allenes. [作者：Meng, Xiangtai;Huang, You;Chen, Ruyu;,期刊：Organic Letters, 页码：137-140 , 文章类型： 研究论文，,卷期：2009年11-1] A new bifunctional phosphine catalyst, (2'-hydroxy-biphenyl-2-yl)-diethylphosphane (LBBA-1), was developed for the highly stereoselective synthesis of cis-2,3-dihydrobenzofurans, e.g., I, via an aza-Morita-Baylis-Hillman... Palladium-Catalyzed Coupling of Hydroxylamines with Aryl Bromides, Chlorides, and Iodides. [作者：Porzelle, Achim;Woodrow, Michael D.;Tomkinson, Nicholas C. O.;,期刊：Organic Letters, 页码：233-236 , 文章类型： 研究论文，,卷期：2009年11-1] The bis-pyrazole phosphine ligand BippyPhos is effective for the palladium-catalyzed cross-coupling of hydroxylamines with aryl bromides, chlorides, and iodides. Reactions proceed smoothly at 80 癈 in toluene in the pres... Total Synthesis and Structural Confirmation of Brevisamide, a New Marine Cyclic Ether Alkaloid from the Dinoflagellate Karenia brevis. [作者：Kuranaga, Takefumi;Shirai, Tomohiro;Baden, Daniel G.;Wright, Jeffrey L. C.;Satake, Masayuki;Tachibana, Kazuo;,期刊：Organic Letters, 页码：217-220 , 文章类型： 研究论文，,卷期：2009年11-1] The first total synthesis of brevisamide (I) has been accomplished in 21 linear steps starting from cis-but-2-ene-1,4-diol. A synthetic highlight is the Suzuki-Miyaura coupling between an ether ring fragment and a dieno... Solution Phase, Solid State, and Theoretical Investigations on the MacMillan Imidazolidinone. [作者：Brazier, John B.;Evans, Gareth;Gibbs, Timothy J. K.;Coles, Simon J.;Hursthouse, Michael B.;Platts, James A.;Tomkinson, Nicholas C. O.;,期刊：Organic Letters, 页码：133-136 , 文章类型： 研究论文，,卷期：2009年11-1] A combination of soln. phase NMR, X-ray crystallog. studies, and DFT calcns. provide a consistent structural conformation for iminium ions derived from the MacMillan imidazolidinone. Palladium-Catalyzed Synthesis of Endocyclic Allenes and Their Application in Stereoselective [2 + 2]Cycloaddition with Ketenes. [作者：Ogasawara, Masamichi;Okada, Atsushi;Nakajima, Kiyohiko;Takahashi, Tamotsu;,期刊：Organic Letters, 页码：177-180 , 文章类型： 研究论文，,卷期：2009年11-1] Palladium-catalyzed reactions of various 2-bromo-3-exo-methylenecycloalkenes with a stabilized nucleophile were examd. When the carbocycles were nine-membered or larger, the corresponding endocyclic allenes were isolate... Asymmetric Radical and Anionic Cyclizations of Axially Chiral Carbamates. [作者：Guthrie, David B.;Curran, Dennis P.;,期刊：Organic Letters, 页码：249-251 , 文章类型： 研究论文，,卷期：2009年11-1] whose racemization barriers exceed 30 kcal/mol. The resolved axially chiral carbamates undergo radical and anionic cyclizations with high levels of chirality transfer from the N-Ar axis to the new stereocenter in the su... Stereospecific Synthesis of Alkyl-Substituted Vicinal Diamines from the Mother Diamine: Overcoming the "Intrinsic Barrier" to the Diaza-Cope Rearrangement Reaction. [作者：Kim, Hyunwoo;Staikova, Mima;Lough, Alan J.;Chin, Jik;,期刊：Organic Letters, 页码：157-160 , 文章类型： 研究论文，,卷期：2009年11-1] Addn. of isobutyraldehyde to 1,2-bis(2-hydroxyphenyl)-1,2-diaminoethane (mother diamine) cleanly gives a stable, fused imidazolidine-dihydro-1,3-oxazine ring complex. However, vigorous heating of the fused ring complex g... Bridged Triphenylamine-Based Dendrimers: Tuning Enhanced Two-Photon Absorption Performance with Locked Molecular Planarity. [作者：Fang, Zhen;Teo, Tang-Lin;Cai, Liping;Lai, Yee-Hing;Samoc, Anna;Samoc, Marek;,期刊：Organic Letters, 页码：1-4 , 文章类型： 研究论文，,卷期：2009年11-1] Benzoquinolizinoacridines I (R = R1 = H, Br; R = Me3C, R1 = Br; R = Br, R1 = I) are prepd. as precursors to triarylamines in which the triarylamine moiety is forced into planarity and used to prepd. compds. with multiple... Lewis Acid Catalyzed Formation of Tetrahydroquinolines via an Intramolecular Redox Process. [作者：Murarka, Sandip;Zhang, Chen;Konieczynska, Marlena D.;Seidel, Daniel;,期刊：Organic Letters, 页码：129-132 , 文章类型： 研究论文，,卷期：2009年11-1] Polycyclic tetrahydroquinolines, e.g., I, were prepd. by an efficient Lewis acid catalyzed 1,5-hydride shift, ring closure sequence. Gadolinium triflate was identified as a catalyst that is superior to scandium triflate ... Absolute Configuration of Ketone Cyanohydrins by 1H NMR: The Special Case of Polar Substituted Tertiary Alcohols. [作者：Louzao, Iria;Garcia, Rosa;Seco, Jose Manuel;Quinoa, Emilio;Riguera, Ricardo;,期刊：Organic Letters, 页码：53-56 , 文章类型： 研究论文，,卷期：2009年11-1] The abs. configuration of ketone cyanohydrins can be assigned from anal. of the 1H NMR spectra of the corresponding (R)- and (S)-MPA ester derivs. and use of DdRS signs. This is an application of the NMR methodol. for s... Organic Dyes Containing Furan Moiety for High-Performance Dye-Sensitized Solar Cells. [作者：Lin, Jiann T.;Chen, Pin-Cheng;Yen, Yung-Sheng;Hsu, Ying-Chan;Chou, Hsien-Hsin;Yeh, Ming-Chang P.;,期刊：Organic Letters, 页码：97-100 , 文章类型： 研究论文，,卷期：2009年11-1] New metal-free dyes with a furan moiety in the conjugated spacer between the arylamine donor and the 2-cyanoacrylic acid acceptor were synthesized, - high efficiency dye-sensitized solar cells were fabricated using these...