Tetrahedron letters

Catalytic ketone olefination with methyltrioxorhenium

FM Pedro, S Hirner, FE Kühn

文献索引：Pedro, Filipe M.; Hirner, Sebastian; Kuehn, Fritz E. Tetrahedron Letters, 2005 , vol. 46, # 45 p. 7777 - 7779

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被引用次数: 32

摘要

Methyltrioxorhenium (MTO) catalyses the olefination of ketones with ethyl diazoacetate in the presence of triphenylphosphane. Unactivated ketones require the addition of 0.5 equiv of benzoic acid to achieve good yields, while trifluoromethyl ketones require no co-catalyst. The optimised system allows the olefination of aromatic, aliphatic, unsaturated, cyclic and trifluoromethyl ketones.