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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28条记录   Chemoselective synthesis of new functionalized tri(pyridinium) triflates and tosylates bearing chalcogenophosphoryl moieties. [作者：Gusarova, Nina K.;Ivanova, Nina I.;Volkov, Pavel A.;Larina, Ludmila I.;,期刊：Synthesis, 页码：3525-3529 , 文章类型： 研究论文，,卷期：2008年-21] equiv. of 4-toluenesulfonic or trifluoromethanesulfonic acids under mild conditions (THF, r.t., 50-80 min, THF) to give the corresponding tri(pyridinium) triflates and tosylates in quant. yields. Efficient copper-catalyzed coupling of 2-haloacetanilides with phosphine oxides and phosphites under mild conditions. [作者：Jiang, Deshou;Jiang, Qun;Fu, Hua;Jiang, Yuyang;Zhao, Yufen;,期刊：Synthesis, 页码：3473-3477 , 文章类型： 研究论文，,卷期：2008年-21] We have developed a highly efficient method for the copper-catalyzed coupling of 2-haloacetanilides with phosphine oxides and dialkyl phosphonates in the presence of a catalytic amt. of copper(I) iodide and N-methylpyrro... Efficient diastereoselective synthesis of phosphonato vinylsulfones via a multicomponent method. [作者：Alizadeh, Abdolali;Rostamnia, Sadegh;,期刊：Synthesis, 页码：3447-3452 , 文章类型： 研究论文，,卷期：2008年-21] The phosphonato vinylsulfone building block was prepd. by a facile three-component reaction of an acetylene, a sulfonyl chloride and a trialkyl phosphite. The reaction proceeded stereoselectively affording (E)-vinylsulf... Regiospecific bromination of 2-phenyl-3H-pyrimidin-4-ones. [作者：Zanatta, Nilo;Fantinel, Leonardo;Fernandes, Liana da S.;Wouters, Ana D.;Bonacorso, Helio G.;Martins, Marcos A. P.;,期刊：Synthesis, 页码：3492-3496 , 文章类型： 研究论文，,卷期：2008年-21] Three methods for the regiospecific bromination of 2-phenyl-3H-pyrimidin-4-ones are presented: bromination of the 5-position of the pyrimidine ring, bromination of the 6-benzylic position, and simultaneous bromination of... Synthesis of 5-amino-4-(2-azacycloalkylidene)-2-phenyl-2,4-dihydro-3H-pyrazol-3-on es. [作者：Nazarenko, Konstantin G.;Bova, Sergey I.;Polovinko, Vitaliy;Tolmachev, Andrey A.;,期刊：Synthesis, 页码：3497-3503 , 文章类型： 研究论文，,卷期：2008年-21] methylthioalkylidene iminium salts) was investigated. It occurs on the active CH2 group of I to furnish cyclic enamines, 4-(2-azacycloalkylidene)- and 4-(1-methyl-2-azacycloalkylidene)-5-amino-2-phenyl-2,4-dihydro-3H-py... Nitriles and carbonyl groups as acceptors in titanocene-catalyzed radical cyclizations. [作者：Gansaeuer, Andreas;Piestert, Frederik;Huth, Inga;Lauterbach, Thorsten;,期刊：Synthesis, 页码：3509-3515 , 文章类型： 研究论文，,卷期：2008年-21] A catalytic approach to the titanocene-mediated radical cyclization of epoxy nitriles and epoxy carbonyl compds. to hydroxy ketones and diols is described. The reaction is sensitive to the substitution pattern of the ca... An improved preparation of 3-alkoxypyrazoles. [作者：Guillou, Sandrine;Bonhomme, Frederic J.;Janin, Yves L.;,期刊：Synthesis, 页码：3504-3508 , 文章类型： 研究论文，,卷期：2008年-21] The condensation between alkyl acetoacetates and hydrazines constitutes the very well-known Knorr synthetic method leading to pyrazol-3/5-ones. However, contemporary reports describe an alternate reaction pathway leadin... Pot, atom, and step economic (PASE) synthesis of highly substituted piperidines: a five-component condensation. [作者：Clarke, Paul A.;Zaytsev, Andrey V.;Whitwood, Adrian C.;,期刊：Synthesis, 页码：3530-3532 , 文章类型： 研究论文，,卷期：2008年-21] The diastereoselective pot, atom, and step economic (PASE) synthesis of highly functionalized piperidines is reported. The procedure simply involves mixing of acetoacetate with 2 equiv arom. aldehyde and 2 equiv aniline... Multicomponent domino cyclization-oxidative aromatization on a bifunctional Pd/C/K-10 catalyst: an environmentally benign approach toward the synthesis of pyridines. [作者：De Paolis, Omar;Baffoe, Jonathan;Landge, Shainaz M.;Torok, Bela;,期刊：Synthesis, 页码：3423-3428 , 文章类型： 研究论文，,卷期：2008年-21] A one-pot synthesis of substituted pyridines via a domino cyclization-oxidative aromatization (dehydrogenation) approach is described. The process is based on the use of a new bifunctional noble metal-solid acid catalys... Syntheses of aromatic substituted 6'-thiothalidomides. [作者：Luo, Weiming;Yu, Qian-sheng;Tweedie, David;Deschamps, Jeffery;Parrish, Damon;Holloway, Harold W.;Li, Yazhou;Brossi, Arnold;Greig, Nigel H.;,期刊：Synthesis, 页码：3415-3422 , 文章类型： 研究论文，,卷期：2008年-21] A resurgence of interest in thalidomide has occurred as a consequence of its diverse immunomodulatory and anticancer actions, which has fueled interest in synthetic analogs with higher potencies or less undesirable side ... A facile one-pot synthesis of substituted pyridine-2,4(1H,3H)-diones from acyl(carbamoyl)ketene S,S-acetals. [作者：Li, Yunhui;Li, Wenliang;Zhang, Rui;Zhou, Yang;Dong, Dewen;,期刊：Synthesis, 页码：3411-3414 , 文章类型： 研究论文，,卷期：2008年-21] A facile and efficient one-pot synthesis of substituted pyridine-2,4(1H,3H)-diones was developed. Subjected to DMF-DMA in DMF at 120? a series of acyl(carbamoyl)ketene dithioacetals was converted into the corresponding ... A straightforward synthesis of 2,3,4,5-tetrasubstituted tetrahydrofuran derivatives. [作者：Aljarilla, Ana;Plumet, Joaquin;,期刊：Synthesis, 页码：3516-3524 , 文章类型： 研究论文，,卷期：2008年-21] A concise synthesis of 2,3,4,5-tetrasubstituted tetrahydrofurans starting from furan via 7-oxabicyclo[2.2.1]hept-5-ene-2,3-diols (2,3-dihydroxy-7-oxanorbornenes) is reported. The key step of these transformations was th... Preparation of dicyano- and methylcobinamide from vitamin B12a. [作者：Wedemeyer-Exl, Christina;Darbre, Tamis;Keese, Reinhart;,期刊：Synthesis, 页码：3429-3432 , 文章类型： 研究论文，,卷期：2008年-21] Treatment of vitamin B12a (hydroxycobalamin HCl, aquocobalamin) with NaBH4 and ZnCl2 leads to the selective cleavage of the nucleotide loop and gives dicyanocobinamide in good yield. Methylcobinamide was prepd. from the... Extension of the library of biologically active g-alkylidene butenolides. [作者：Novak, Petr;Pour, Milan;Spulak, Marcel;Votruba, Ivan;Kotora, Martin;,期刊：Synthesis, 页码：3465-3472 , 文章类型： 研究论文，,卷期：2008年-21] g-Alkylidene butenolides bearing a deoxyriboside, a steroid, and a ferrocene moiety were synthesized by stereoselective sequential cross-coupling lactonization from appropriate terminal alkynes with 3-iodopropenoates. T... Chemoselective etherification of benzyl alcohols using 2,4,6-trichloro-1,3,5-triazine and methanol or ethanol catalyzed by dimethyl sulfoxide. [作者：Sun, Lili;Guo, Yuping;Peng, Guisheng;Li, Chunbao;,期刊：Synthesis, 页码：3487-3491 , 文章类型： 研究论文，,卷期：2008年-21] An efficient method for the transformation of benzyl alcs. into their Me or Et ethers was established using 2,4,6-trichloro-1,3,5-triazine (TCT) and DMSO in MeOH or EtOH. This procedure chemoselectively converts benzyli... Direct reduction of esters to ethers with an indium(III) bromide/triethylsilane catalytic system. [作者：Sakai, Norio;Moriya, Toshimitsu;Fujii, Kohji;Konakahara, Takeo;,期刊：Synthesis, 页码：3533-3536 , 文章类型： 研究论文，,卷期：2008年-21] An InBr3-Et3SiH reagent system promotes direct redn. of esters to produce the corresponding unsym. ethers. This simple catalytic system accommodated other carbonyl compds., such as a tertiary amide and a carboxylate.