期刊
TETRAHEDRON LETTERS
卷 50, 期 9, 页码 979-982出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.tetlet.2008.12.046
关键词
Copper; Scandium(III); Bis(oxazolinyl)pyridine; Bis(oxazoline); Electrostatic immobilisation; Ene reaction; Silica; Molecular modelling
资金
- NUI-Galway for a fellowship (CMD)
- Science Foundation Ireland (RFP)
- SFI/HEA Irish Centre for High-End Computing (ICHEC)
Copper(I), copper(II) and scandium(III) triflate complexes of BOX and PYBOX ligands have been electrostatically immobilised on silica. The performance of the immobilised catalysts, in the two carbonyl-ene reactions Studied, compares very well with that of their homogeneous equivalents. The immobilised catalysts were successfully reused a number of times. In the case of a scandium complex, a variation in enantioselectivity of up to 73% was observed on immobilisation compared to its use homogeneously. The reason for this variation in enantioselectivity is explored with the aid of molecular modelling. (C) 2008 Elsevier Ltd. All rights reserved.
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