Malonic acid, disodium salt → Bicyclo[3,2,2]non-8-ene-2-carbonyl malonic acid

Participants

Reaction Steps

To a solution containing sodium malonate (17.1 g) which was prepared according to the same procedure as in Example 7, bicyclo[3,2,2]non-8-ene-2-carbonyl chloride (18.4 g) obtained in Preparation Example 3 is slowly added, and the reaction mixture is reacted at −20° C. in a nitrogen atmosphere for 1 hour, and further reacted at 45° C. for 8 hours. Then, the mixture is worked up as in the procedure of Example 1, to obtain 22 g of the pure title compound (purity: 99%, yield: 87%).

Provenance & Evidence