反应详情

16.1 g (0.05 mol) of 5-(3,4,5-trimethoxyphenylmethylene)-2,2-dimethyl-1,3-dioxane-4,6-dione (m.p.: 159°-160° C.) were added to 50 ml of the mixture of formic acid and triethylamine prepared as described in Example 1, then the procedure described in Example 2 was followed.

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