Chemical and Pharmaceutical Bulletin p. 3469 - 3472 (1985)
Update date:2022-08-11
Topics:
Mori
Satake
The uptake of CO2 by potassium phenoxide (PhOK) in N,N-dimethylformamide (DMF) was investigated in a vacuum system. Further, the carboxylation of cyclohexanone by various amounts of CO2 complexed with PhOK was studied. The yield of the carboxylate at 30s increased with increase of M.R. (molar ratio of CO2 absorbed by PhOK to PhOK initially added) in the range of M.R. less than 0.41. However, in the range of M.R. above 0.60, it decreased with increase of M.R. The time required for completion of the reaction depended on the M.R., and the three ranges were distinguishable. The ultimate yield of the carboxylate in the carboxylation increased proportionally to M.R. value. It is considered that the source of CO2 for carboxylate formation was CO2 complexed with PhOK rather than uncomplexed CO2.
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