Aerobic epoxidation via alkyl-2-oxocyclopentanecarboxylate co-oxidation with cobalt or manganese Jacobsen-type catalysts

B Rhodes, S Rowling, P Tidswell, S Woodward…

Index: Rhodes, Barry; Rowling, Simon; Tidswell, Peter; Woodward, Simon; Brown, Stephen M. Journal of Molecular Catalysis A: Chemical, 1997 , vol. 116, # 3 p. 375 - 384

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Citation Number: 39

Abstract

In the presence of methyl, tert-butyl, or (−)-menthyl esters of 2-oxocyclopentanecarboxylic acids Jacobsen-type complexes of cobalt (II) and manganese (III) form active catalysts for alkene epoxidation using molecular oxygen. Alkyl-1-hydroxy-2- oxocyclopentanecarboxylates and 1-alkyl-2-oxo-hexanedicarboxylic acids are formed as co- oxidation products. The (−)-menthyl/cobalt system is selective for epoxide production but ...