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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32条记录   Microwave-assisted intramolecular Diels-Alder reaction towards the total synthesis of symbioimine. [作者：Born, Stephen;Bacani, Genesis;Olson, Erin E.;Kobayashi, Yoshihisa;,期刊：SYNLETT, 页码：2877-2881 , 文章类型： 研究论文，,卷期：2008年-18] Uemura's proposed biosynthetic pathway of symbioimine was demonstrated by microwave-assisted intramol. Diels-Alder reaction of a trans-enone precursor. Formal asymmetric synthesis of (-)-aphanorphine via ring-closing metathesis reaction. [作者：Yang, Xiaobao;Cheng, Bin;Li, Zhong;Zhai, Hongbin;,期刊：SYNLETT, 页码：2821-2822 , 文章类型： 研究论文，,卷期：2008年-18] An asym. route to (-)-aphanorphine from O-Me-D-tyrosine Me ester.HCl, available from D-tyrosine in 4 steps, was developed. The tricyclic framework of (-)-aphanorphine was assembled stereoselectively by intramol. Friedel... Convenient formal synthesis of (+)-grandisol through Lewis acid promoted enantioselective pinacolic rearrangement. [作者：Frongia, Angelo;Girard, Christian;Ollivier, Jean;Piras, Pier Paolo;Secci, Francesco;,期刊：SYNLETT, 页码：2823-2825 , 文章类型： 研究论文，,卷期：2008年-18] The Ti-mediated cyclopropanation of an easily prepd. chiral a-siloxylactone leads efficiently to an enantiomerically pure cyclopropanol deriv. The Me3SiO3SCF3-induced pinacol rearrangement allows high level of chirality... Synthesis of cyclic sulfonamides via Pd-catalyzed intramolecular coupling reaction: an expedient approach to polycyclic sultams. [作者：Majumdar, K. C.;Mondal, Shovan;De, Nirupam;,期刊：SYNLETT, 页码：2851-2855 , 文章类型： 研究论文，,卷期：2008年-18] A divergent synthetic approach to polycyclic sultams utilizing intramol. ligand-free intramol. coupling reaction is described. E.g., in presence of palladium acetate, intramol. coupling reaction of sulfonamide I gave 85... Original SRN1 reactions on new non-nitrated heterocyclic system. [作者：Szabo, Remi;Crozet, Maxime D.;Vanelle, Patrice;,期刊：SYNLETT, 页码：2836-2840 , 文章类型： 研究论文，,卷期：2008年-18] A new 3-bromo-2-(chloromethyl)-4H-pyrido[1,2-a]pyrimidin-4-one was prepd. and reacted under exptl. conditions of SRN1 reactions with different S- and C-centered nucleophiles. A SRN1 reaction in non-nitrated 4H-pyrido[1,... Novel extensions of the tert-amino effect: formation of phenanthridines and diarene-fused azocines from ortho-ortho'-functionalized biaryls. [作者：Polonka-Balint, Agnes;Saraceno, Caterina;Ludanyi, Krisztina;Benyei, Attila;Matyus, Peter;,期刊：SYNLETT, 页码：2846-2850 , 文章类型： 研究论文，,卷期：2008年-18] Phenanthridines and azocines fused to two benzene rings or one benzene and one pyridazinone ring, which are otherwise difficult to access, were prepd. via two new extensions of the tert-amino effect. The synthetic pathwa... A short and efficient synthesis of 3-spiro-a-methylene-g-butyrolactone oxindolones from isomerised bromo derivatives of Morita-Baylis-Hillman adducts. [作者：Shanmugam, Ponnusamy;Viswambharan, Baby;,期刊：SYNLETT, 页码：2763-2768 , 文章类型： 研究论文，,卷期：2008年-18] isomerized bromo derivs. of Morita-Baylis-Hillman adducts of isatin and formaldehyde followed by acid-catalyzed lactonization was achieved. The oxindolidino allyl bromide was used for the allylation of aldehydes to affo... A very mild access to 3,4-dihydroisoquinolines using triphenyl phosphite-bromine-mediated Bischler-Napieralski-type cyclization. [作者：Vaccari, Daniele;Davoli, Paolo;Ori, Claudia;Spaggiari, Alberto;Prati, Fabio;,期刊：SYNLETT, 页码：2807-2810 , 文章类型： 研究论文，,卷期：2008年-18] Substituted N-phenethyl amides undergo smooth intramol. cyclization to 3,4-dihydroisoquinolines in good to excellent yields on treatment with [(PhO)3PBr]+Br- at -60?in CH2Cl2 in the presence of Et3N. The reaction procee... Directed palladium-catalyzed oxidative C-H arylation of (hetero)arenes with arylboronic acids by using TEMPO. [作者：Kirchberg, Sylvia;Vogler, Thomas;Studer, Armido;,期刊：SYNLETT, 页码：2841-2845 , 文章类型： 研究论文，,卷期：2008年-18] Oxidative coupling of different arenes and a thiophene with various arylboronates with Pd(OAc)2 and the com. available 2,2,6,6-tetramethylpiperidin-N-oxyl radical (TEMPO) as an oxidant are reported. A 2-pyridyl group on... Stereoselective first total synthesis of a ten-membered macrolide from L-malic acid and (2R)-2,3-O-cyclohexylideneglyceraldehyde. [作者：Krishna, Palakodety Radha;Sreeshailam, A.;,期刊：SYNLETT, 页码：2795-2798 , 文章类型： 研究论文，,卷期：2008年-18] A convergent stereoselective first total synthesis of the novel natural 10-membered macrolide I from L-malate and (2R)-2,3-O-cyclohexylideneglyceraldehyde is reported. Prolinamide/PPTS-catalyzed Hajos-Parrish annulation: efficient approach to the tricyclic core of cylindricine-type alkaloids. [作者：Zhang, Xiao-Ming;Wang, Min;Tu, Yong-Qiang;Fan, Chun-An;Jiang, Yi-Jun;Zhang, Shu-Yu;Zhang, Fu-Min;,期刊：SYNLETT, 页码：2831-2835 , 文章类型： 研究论文，,卷期：2008年-18] A series of Wieland-Miescher ketone analogs bearing highly functionalized substituents are efficiently constructed in high enantioselectivities and good yields using catalytic amts. of prolinamide and PPTS. We have succ... Malononitrile as acyl anion equivalent. [作者：Foester, Sebastian;Tverskoy, Olena;Helmchen, Guenter;,期刊：SYNLETT, 页码：2803-2806 , 文章类型： 研究论文，,卷期：2008年-18] The oxidn. of malononitrile derivs. with peracid in MeOH proceeds with loss of the CN groups to yield Me esters in high yield. The method was applied to a variety of malononitriles, some of which were prepd. by Pd- or I... 2-Iminothiolane as a useful coupling reagent for polyamine solid-phase synthesis. [作者：Hahn, Frank;Muellen, Klaus;Schepers, Ute;,期刊：SYNLETT, 页码：2785-2790 , 文章类型： 研究论文，,卷期：2008年-18] Here, the versatility of 2-iminothiolane to act as coupling reagent for solid-phase synthesis of polyamine conjugates is shown. This method, which supersedes the use of elaborate protection group strategies, allows the ... Diastereoselective synthesis of syn-1,3-dinitro compounds by Michael addition of nitroalkanes to nitroalkenes with a thiourea catalyst. [作者：Rabalakos, Constantinos;Wulff, William D.;,期刊：SYNLETT, 页码：2826-2830 , 文章类型： 研究论文，,卷期：2008年-18] reaction affords good yields of syn-1,3-dinitro adducts with only 2% catalyst loading. Synthesis of five- and six-membered-ring compounds by environmentally friendly radical cyclizations using Kolbe electrolysis. [作者：Lebreux, Frederic;Buzzo, Ferdinando;Marko, Istvan E.;,期刊：SYNLETT, 页码：2815-2820 , 文章类型： 研究论文，,卷期：2008年-18] Substituted carbocycles, tetrahydrofurans, and tetrahydropyrans can be efficiently obtained from w-unsatd. carboxylic acids. The methodol. involves a Kolbe decarboxylation followed by an intramol. radical cyclization an... Oxidation of primary amines to ketones. [作者：Knowles, Deborah A.;Mathews, Christopher J.;Tomkinson, Nicholas C. O.;,期刊：SYNLETT, 页码：2769-2772 , 文章类型： 研究论文，,卷期：2008年-18] A simple method for the oxidn. of primary amines to the corresponding ketones in the presence of both moisture and air is described. Treatment of an amine with benzoyl peroxide in the presence of Cs2CO3, followed by warm...