反应详情

25.0 G. of 2-carboxy-5-oxo-5H-dibenzo[a,d]cycloheptene is added to a mixture of 4.0 g. of sodium hydroxide in 500 ml. of aqueous methanol. The mixture is stirred for 3 hours at room temperature, then the mixture is evaporated to afford sodium (5-oxo-5H-dibenzo[a,d]cylohepten--yl)carboxylate -yl)-carboxylate (m.p. 300° C). By employing 5.6 g. of potassium hydroxide in place of the sodium hydroxide above, there is obtained potassium (5-oxo-5H-dibenzo[a,d]cyclohepten-2-yl)carboxylate.

1. customthe mixture is evaporated