A nordehydroabietyl amide-containing chiral diene for rhodium-catalysed asymmetric arylation to nitroolefins
作者:Ruikun Li、Zhongqing Wen、Na Wu
DOI:10.1039/c6ob02202b
日期:——
A highlyenantioselectiverhodium catalysed asymmetric arylation (RCAA) of nitroolefins with arylboronicacids is presented using a newly developed, C1-symmetric, non-covalent interacted, phellandrene derived, nordehydroabietyl amide-containing chiral diene under mild conditions. Stereoelectronic effects were studied, suggesting an activation of the bound substrate through the secondary amide as a
Multifunctional isoquinoline-oxazoline ligands of chemical and biological importance
作者:Wei Li、Guotong Wang、Jixing Lai、Shengkun Li
DOI:10.1039/c9cc01790a
日期:——
Multifunctional isoquinoline-oxazolines (MIQOXs) were conceived and synthesized from commercially available chiral amino acids. The multifunctional role of MIQOXs was demonstrated by Pd-catalyzed highly enantioselective addition of arylboronic acids to nitrostyrenes, and by the discovery of novel antifungal candidates.
Pd–NHC Catalyzed Conjugate Addition versus the Mizoroki–Heck Reaction
作者:Aditya L. Gottumukkala、Johannes G. de Vries、Adriaan J. Minnaard
DOI:10.1002/chem.201003643
日期:2011.3.7
Ace of base: A catalytic system is presented that, solely by choice of the base, selectively switches between conjugateaddition and the Mizoroki–Heckreaction of aryl halides with Michael acceptors (see scheme; R, R′=alkyl, aryl). For conjugateadditionreactions, this avoids the preparation and use of organometallics.
Palladium(II)-Catalyzed Michael-Type Hydroarylation of Nitroalkenes Using Aryltins and Sodium Tetraarylborates
作者:Toshiyuki Ohe、Sakae Uemura
DOI:10.1246/bcsj.76.1423
日期:2003.7
variety of aryltin compounds and sodium tetraarylborates can be employed for Michael-type hydroarylation reactions of nitroalkenes to afford β-arylnitroalkanes in moderate to good yields in the presence of either LiCl, MgCl2, or CaCl2 and a catalytic amount of palladium(II) salt (0.05 molar amount) in acetic acid. Results show that 50–70% of aryl groups out of all in these arylcompounds can be transferred
Friedel-Crafts alkylation of various arenes/heteroarenes to beta-nitrostyrenes mediated by aluminum chloride is described. The interesting feature of this methodology pertain the formation of different products by tuning the reaction temperature. alpha-Arylated nitroalkanes were formed predominately at -78 degrees C, whereas alpha-arylated hydroximoyl chlorides were obtained at room temperature without any side products in high yields. (C) 2009 Elsevier Ltd. All rights reserved.