个性化文献订阅>文章检索

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36条记录   Magnesium nitride as a convenient source of ammonia: preparation of pyrroles. [作者：Veitch, Gemma E.;Bridgwood, Katy L.;Rands-Trevor, Karen;Ley, Steven V.;,期刊：SYNLETT, 页码：2597-2600 , 文章类型： 研究论文，,卷期：2008年-17] The synthesis of a diverse array of pyrroles is reported from the cyclocondensation of 1,4-dicarbonyl compds. with Mg3N2 in MeOH. FeCl2-catalyzed aminobromination of alkenes using amides or sulfonamides and NBS as the nitrogen and bromine sources. [作者：Wang, Zhe;Zhang, Yongming;Fu, Hua;Jiang, Yuyang;Zhao, Yufen;,期刊：SYNLETT, 页码：2667-2670 , 文章类型： 研究论文，,卷期：2008年-17] A convenient and efficient iron-catalyzed aminobromination of the alkenes using inexpensive FeCl2 as the catalyst, amides/sulfonamides and NBS as the nitrogen and bromine sources, resp., under mild conditions has been de... Ethyl vinyl ether as a synthetic equivalent of acetylene in a DABCO-catalyzed microwave-assisted Diels-Alder-elimination reaction sequence starting from 2H-pyran-2-ones. [作者：Kranjc, Kristof;Kocevar, Marijan;,期刊：SYNLETT, 页码：2613-2616 , 文章类型： 研究论文，,卷期：2008年-17] microwave-accelerated sequence of a cycloaddn. followed by a retro-Diels-Alder reaction (elimination of CO2) and a 2nd elimination step of EtOH yields substituted anilines. The reaction sequence is greatly accelerated b... Regioselective synthesis of polyketide-type phenols by formal [3+3]-cyclocondensations of 1,3-bis(silyloxy)-1,3-butadienes with 3-oxo-orthoesters. [作者：Lubbe, Mathias;Guetlein, Joerg-Peter;Reinke, Helmut;Langer, Peter;,期刊：SYNLETT, 页码：2671-2673 , 文章类型： 研究论文，,卷期：2008年-17] A variety of 4-methoxysalicylates and related polyketide-type phenols are regioselectively prepd. by the first formal [3+3]-cyclocondensations of 1,3-bis(trimethylsilyloxy)-1,3-butadienes with 3-oxo orthoesters. Exo- and enantioselective Diels-Alder reactions: pyrazolidinone auxiliaries as a means to enhanced exo selectivity. [作者：Sibi, Mukund P.;Nie, Xiaoping;Shackleford, Jessica P.;Stanley, Levi M.;Bouret, Frances;,期刊：SYNLETT, 页码：2655-2658 , 文章类型： 研究论文，,卷期：2008年-17] Achiral pyrazolidinone auxiliaries were investigated in exo- and enantioselective Diels-Alder reactions. The effect of pyrazolidinone N(1) substitution and chiral ligand identity were studied in Yb(OTf)3-catalyzed exo-s... Synthesis of a bicyclo[8.3.1]enediyne via chromium-mediated dearomatization of 2,6-bis(trimethylsilyl)anisole. [作者：Lavy, Severine;Perez-Luna, Alejandro;Kundig, E. Peter;,期刊：SYNLETT, 页码：2621-2624 , 文章类型： 研究论文，,卷期：2008年-17] The novel bicyclic enediyne rac-I was readily synthesized by Cr-mediated dearomatization of 2,6-(Me3Si)2C6H3OMe. The enediyne undergoes Bergman cyclization with a half-life of 14.4 h at 142? A novel method for the synthesis of thioacetates using benzyltriethylammonium tetrathiomolybdate and acetic anhydride. [作者：Nasir, Baig R. B.;Sai, Sudhir V.;Chandrasekaran, Srinivasan;,期刊：SYNLETT, 页码：2684-2688 , 文章类型： 研究论文，,卷期：2008年-17] A simple and efficient methodol. for the synthesis of thioacetates was reported using [BnNEt3]2MoS4 and Ac2O as the key reagents, starting from alkyl halides in a multistep tandem reaction. Its application in the synthe... Enantioselective direct amination of a-cyanoketones catalyzed by bifunctional organocatalysts. [作者：Kim, Sun Mi;Lee, Ju Hee;Kim, Dae Young;,期刊：SYNLETT, 页码：2659-2662 , 文章类型： 研究论文，,卷期：2008年-17] ketones with azodicarboxylates as electrophilic amination reagents under mild reaction conditions afforded the corresponding a-aminated a-cyano ketones with excellent enantiomeric excess (87-99%). Facile preparation of thiazoles from 1H-1-(1'-alkynyl)-5-methyl-1,2,3-benziodoxathiole 3,3-dioxide with thioamides. [作者：Ishiwata, Yoshihide;Togo, Hideo;,期刊：SYNLETT, 页码：2637-2641 , 文章类型： 研究论文，,卷期：2008年-17] were easily prepd. from the reaction of 1H-1-hydroxy-5-methyl-1,2,3-benziodoxathiole 3,3-dioxide and 1-alkynes, with thioamides. Here, the co-product, potassium 2-iodo-5-methylbenzenesulfonate, was recovered quant. by s... Diastereoselective synthesis of substituted 4-piperidones and 4-piperidols using a double Mannich reaction. [作者：Chan, Yinman;Guthmann, Holger;Brimble, Margaret A.;Barker, David;,期刊：SYNLETT, 页码：2601-2604 , 文章类型： 研究论文，,卷期：2008年-17] A simple and efficient synthesis of polysubstituted 4-piperidones was achieved from the double Mannich reaction of b-keto esters and bisaminol ethers. The reaction is highly diastereoselective, as is the subsequent hydr... A new one-pot procedure for a ring contraction reaction using iodine/H2O2. [作者：Ferreira, Sabrina B.;Kaiser, Carlos R.;Ferreira, Vitor F.;,期刊：SYNLETT, 页码：2625-2628 , 文章类型： 研究论文，,卷期：2008年-17] A new procedure for ring contraction of 1,2-quinones using aq. H2O2 (30%) and a catalytic amt. of I2 in MeCN is reported. Formal synthesis of leustroducsin B. [作者：Moise, Joelle;Sonawane, Ravindra P.;Corsi, Camilla;Wendeborn, Sebastian V.;Arseniyadis, Stellios;Cossy, Janine;,期刊：SYNLETT, 页码：2617-2620 , 文章类型： 研究论文，,卷期：2008年-17] A formal synthesis of leustroducsin B, a potent antitumor compd., is described featuring 2 key reactions: an olefin cross-metathesis between a-methylene-g-butyrolactone and a terminal olefin to install the C(7)-C(12) bac... Synthesis of g-alkylidene a,b-unsaturated d-lactones by ring-closing metathesis: application to the synthesis of the C1-C8 subunit of biselide E. [作者：Salit, Anne-Frederique;Barbazanges, Marion;Miege, Frederic;Larraufie, Marie-Helene;Meyer, Christophe;Cossy, Janine;,期刊：SYNLETT, 页码：2583-2586 , 文章类型： 研究论文，,卷期：2008年-17] The synthesis of g-alkylidene a,b-unsatd. d-lactones was achieved by ring-closing metathesis of acrylates derived from (1,3-butadien-2-yl)methanols. The application to the synthesis of the C(1)-C(8) subunit of biselide ... Synthesis of a,b-unsaturated ketones by rhodium-catalyzed carbonylative arylation of internal alkynes with arylboronic acids. [作者：Kus, Melih;Artok, Ozge Aksin;Ziyanak, Firat;Artok, Levent;,期刊：SYNLETT, 页码：2587-2592 , 文章类型： 研究论文，,卷期：2008年-17] The Rh-catalyzed reaction of arylboronates with internal alkynes under a CO atm. in the presence of an acid additive afforded a,b-unsatd. ketones as the major products. Hydroacylation of internal alkynes, except in the ... The synthesis of triazadibenzo[cd,g]azulenes: how to connect four different rings in just one step?. [作者：Matschke, Martin;Beckert, Rainer;Wuerthwein, Ernst-Ulrich;Goerls, Helmar;,期刊：SYNLETT, 页码：2633-2636 , 文章类型： 研究论文，,卷期：2008年-17] reaction is interpreted as a cascade reaction involving an anionic electrocyclization reaction, a redox sequence and a subsequent dimerization process. The X-ray structural anal. of I (Ar = 4-tolyl) revealed an anti arr... Regioselective synthesis of 2-(arylthio)benzoates by the first catalytic [3+3] cyclocondensations of 3-(arylthio)-1-(trimethylsilyloxy)-1,3-butadienes with 1,1,3,3-tetramethoxypropane. [作者：Imran, Muhammad;Iqbal, Inam;Rasool, Nasir;Rashid, Muhammad A.;Langer, Peter;,期刊：SYNLETT, 页码：2708-2710 , 文章类型： 研究论文，,卷期：2008年-17] 2-(Arylthio)benzoates were regioselectively prepd. by the first catalytic [3+3] cyclizations of 3-(arylthio)-1-(trimethylsilyloxy)-1,3-butadienes with 1,1,3,3-tetramethoxypropane.