Catalytic Oxygenation of 3-Methylindole by Co(II)-Schiff Base Planar Complexes
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چکیده
N,N' -Ethylenebis (acetylacetoniminato)Co(II ) ,Co(acacen) ,andN,N' -ethylenebis (benzoyl acetoniminato)Co(II ) , Co(bzacen) , catalyze the o x y g e n incorporation into 3-methyl indole to give o formylaminoacetophenone selectively. Th e adducts format ion process o f three components , that is, substrate, planar cobalt c o m p l e x and molecular oxygen, and the fol lowing catalytic oxygen incorporation process were conf irmed b y manometr ic measurements o f oxygen uptake, gas-chromatographic analyses o f products and electronic spectra of intermediate oxygen adducts. The mechanism was further justified b y the study of i H N M R spectra on overall reactions.
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