Journal
JOURNAL OF MOLECULAR CATALYSIS A-CHEMICAL
Volume 219, Issue 2, Pages 221-226Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.molcata.2004.05.026
Keywords
D-4-symmetric chiral porphyrin; asymmetric epoxidation
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Novel D-4-symmetric chiral porphyrin le was efficiently prepared by utilizing C-2-symmetric diol as the chiral source. Asymmetric epoxidation of styrene and trans-beta-methyl styrene by the 1c-Fe(Br)/PhIO system showed moderate enantioselectivity, and enantiomeric excesses were markedly increased by the introduction of electron-withdrawing groups at the aromatic rings of styrenes. (C) 2004 Elsevier B.V. All rights reserved.
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