反应详情

The same procedure as that of process (I) of Example 1 was conducted to obtain a 50% by weight methanol solution of (A1). In the same manner, to a 1 liter flask were added 24.00 g of 5-norbornene-2,3-dicarboxylic anhydride and 33.37 g of methanol, and the resulting mixture was stirred under reflux in a water bath kept at 90° C. Ninety minutes after initiation of the stirring, solid components disappeared, 3 hours after, the temperature was lowered to room temperature to obtain a 50% by weight methanol solution of 5-norbornene-2,3-dicarboxylic monomethyl ester.

1. temperatureunder reflux in a water bath
2. customkept at 90° C
3. customwas lowered to room temperature