Abstract
4-Ethoxy- 1,3-benzodioxan-5-yltrimethylammonium salt, prepared from 4-ethoxy-5-nitro-1,3-benzodioxane via 5-dimethylamino-4-ethoxy-1,3-benzodioxane, was hydrolyzed to obtain 2-formyl-3-hydroxyphenyltrimethylammonium chloride in a good yield.

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