TY - JOUR
T1 - Heterogeneous aziridination of styrene using N-(p-nitrophenylsulfonyl)imino phenyliodinane as nitrene donor: influence of the reaction parameters on yield and enantioselectivity
AU - Gullick, John
AU - Taylor, Sophia
AU - McMorn, Paul
AU - Bethell, Donald
AU - Bulman Page, Philip C.
AU - Hancock, Frederick E.
AU - King, Frank
AU - Hutchings, Graham J.
PY - 2002/5/31
Y1 - 2002/5/31
N2 - The copper-catalysed aziridination of styrene with copper-exchanged zeolite Y (CuHY) and copper(II) triflate (Cu(OTf)(2)) as catalysts is described and discussed. In particular, the effects of reaction conditions on the yield and enantiomeric excess of the aziridine product are described using [N-(p-nitrophenyisulfonyl)imino]phenyliodinane (PhI=NNs) as nitrene donor. By careful control of the styrene:nitrene donor molar ratio and the solvent, an ee of 95% can be obtained for the heterogeneously catalysed bis(oxazoline)-modified zeolite CuHY The ee achieved with the zeolite immobilised catalyst is significantly higher than that achieved for the non-immobilised homogeneous catalyst under comparable reaction conditions. (C) 2002 Elsevier Science B.V. All rights reserved.
AB - The copper-catalysed aziridination of styrene with copper-exchanged zeolite Y (CuHY) and copper(II) triflate (Cu(OTf)(2)) as catalysts is described and discussed. In particular, the effects of reaction conditions on the yield and enantiomeric excess of the aziridine product are described using [N-(p-nitrophenyisulfonyl)imino]phenyliodinane (PhI=NNs) as nitrene donor. By careful control of the styrene:nitrene donor molar ratio and the solvent, an ee of 95% can be obtained for the heterogeneously catalysed bis(oxazoline)-modified zeolite CuHY The ee achieved with the zeolite immobilised catalyst is significantly higher than that achieved for the non-immobilised homogeneous catalyst under comparable reaction conditions. (C) 2002 Elsevier Science B.V. All rights reserved.
KW - OLEFINS
KW - ANISOLE
KW - styrene aziridination
KW - donors
KW - SOLID SOLVENTS
KW - ZEOLITE CATALYSTS
KW - FINE CHEMICALS SYNTHESIS
KW - nitrene
KW - bis(oxazoline)-modified CuHY zeolite
U2 - 10.1016/S1381-1169(01)00497-6
DO - 10.1016/S1381-1169(01)00497-6
M3 - Article
VL - 182-183
SP - 571
EP - 575
JO - Journal of Molecular Catalysis A: Chemical
JF - Journal of Molecular Catalysis A: Chemical
SN - 1381-1169
ER -