Binap-Gold(I) versus Binap-Silver Trifluoroacetate Complexes as Catalysts in 1,3-Dipolar Cycloadditions of Azomethine Ylides
作者:María Martín-Rodríguez、Carmen Nájera、José M. Sansano、Abel de Cózar、Fernando P. Cossío
DOI:10.1002/chem.201101606
日期:2011.12.9
The 1,3‐dipolarcycloaddition between azomethine ylides and alkenes is efficiently catalysed by [(Sa)‐Binap‐Au(tfa)}2] (Binap=2,2′‐bis(diphenylphosphino)‐1,1′‐binaphthyl; tfa=trifluoroacetyl). Maleimides, 1,2‐bis(phenylsulfonyl)ethylene, chalcone and nitrostyrene were suitable dipolarophiles even when using sterically hindered 1,3‐dipole precursors. The results obtained in these transformations improve
1,3-Dipolar Cycloadditions of Stabilized Azomethine Ylides and Electrophilic Alkenes Mediated by a Recyclable TSIL·AgOAc Catalyst
作者:David Lledó、Guillermo Grindlay、José Miguel Sansano
DOI:10.1002/ejoc.201900724
日期:2019.7.7
We gratefully acknowledge financial support from the Spanish Ministerio de Ciencia, Innovacion y Universidades (projects CTQ2013-43446-P, CTQ2016-81893REDT and CTQ2014-51912-REDC) the Spanish Ministerio de Economia, Industria y Competitividad, Agencia Estatal de Investigacion (AEI) and Fondo Europeo de Desarrollo Regional (FEDER, EU) (projects CTQ2016-76782-P, CTQ2016-80375-P and CTQ2016-81797-REDC)
我们衷心感谢西班牙部长级经济、创新和大学(项目 CTQ2013-43446-P、CTQ2016-81893REDT 和 CTQ2014-51912-REDC)和西班牙经济、工业和竞争性经济部长 (项目 CTQ2013-43446-P、CTQ2014-51912-REDC) 的财政支持和 Fondo Europeo de Desarrollo Regional(FEDER,EU)(项目 CTQ2016-76782-P、CTQ2016-80375-P 和 CTQ2016-81797-REDC)、Generalitat Valenciana(PROMETEOII/2014/017)和 A 大学。D. Lledo 感谢西班牙教育部长 FPU15/00097 提供的奖学金。
Binap-gold(I) trifluoroacetate as a bifunctional catalyst for the synthesis of chiral prolines through 1,3-dipolar cycloaddition of azomethine ylides
作者:María Martín-Rodríguez、Carmen Nájera、José M. Sansano、Feng-Liu Wu
DOI:10.1016/j.tetasy.2010.06.011
日期:2010.5
Highly enantioselective 1,3-dipolar cycloadditions of amino acid-derived azomethine ylides with alkenes have been performed, for the first time, under gold-catalysis using (S-a)- or (R-a)-Binap-gold(I) trifluoroacetate complexes, with the cationic Binap-gold acting as a Lewis acid and the counteranion as a base. Maleimides and trans-1,2-bis(phenylsulfonyl)ethylene were reacted with imino esters at room temperature in the absence of a base to afford, in very good yields, the corresponding polysubstituted prolines with total endo-diastereoselection and higher enantioselectivities than the Binap-silver trifluoroacetate complex. (C) 2010 Elsevier Ltd. All rights reserved.
BINAP-AgSbF6 vs. BINAP-AgClO4 Complexes as Catalysts for the Enantioselective 1,3-Dipolar Cycloaddition of Azomethine Ylides and Alkenes
作者:José Sansano、María Martín-Rodríguez、Carmen Nájera、Paulo Costa、Evanoel de Lima、Ayres Dias
DOI:10.1055/s-0029-1219534
日期:2010.4
This work has been supported by the DGES of the Spanish Ministerio de Educacion y Ciencia (MEC) (Consolider INGENIO 2010 CSD2007-00006, CTQ2007-62771/BQU, the Hispano-Brazilian project PHB2008-0037-PC and CNPq-2878), Generalitat Valenciana (PROMETEO/2009/039), and by the University of Alicante.
这项工作得到了西班牙教育部长 y Ciencia (MEC) DGES 的支持 (Consolider INGENIO 2010 CSD2007-00006, CTQ2007-62771/BQU, the Hispano-Brazilian project PHB2008-0037-PC and CNPq)-General瓦伦西亚纳 (PROMETEO/2009/039) 和阿利坎特大学。