2,3,5-Trimethyl-1,4-hydroquinone diacylates are obtained by reacting 3,5,5-trimethyl-1,4-benzoquinone with an acylating agent in the presence of methane trisulfonic acid as a catalyst.
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US Patent 07361781 Process for the preparation of 2,3,5-trimethylhydroquinone diacylatesUS Patent 7361781 Process for the preparation of 2,3,5-trimethylhydroquinone diacylates