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- W185292912 abstract "Abstract Cobalt-Schiff base complexes are found to catalyze the oxygenation of alkynes in alcoholic solvents at an elevated temperature resulting in incorporation of monooxygen and the alcohol into the triple bond without any carbon-carbon bond cleavage. Thus, phenylacetylene gives acetophenone ( 2 ), and mandelic ( 3 ) and phenylglyoxylic esters ( 4 ). The formation of 2 results from the following successive reactions: addition of Co(L 1 )(H) produced in situ to the triple bond giving 1-phenyl-1-ethenylcobalt followed by dioxygen insertion into the resulting Co-C bond to form an organoperoxocobalt(III) complex that undergoes readily homolytic cleavage of the peroxy bond. The esters 3 and 4 may result from dioxygen insertion into an another phenylacetylidocobalt complex intermediate, from which phenylglyoxal as the direct precursor of 3 would be derived." @default.
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- W185292912 date "1991-01-01" @default.
- W185292912 modified "2023-09-27" @default.
- W185292912 title "Cobalt-Schiff Base Complex Promoted Oxygenation of Alkynes" @default.
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- W185292912 doi "https://doi.org/10.1016/s0167-2991(08)62823-2" @default.
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