Process for preparing chlorinated hydroquinone dimethyl ethers
AssigneeHoechst Aktiengesellschaft
InventorsHans Millauer, Rudolf Pistorius
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Abstract
Chlorinated hydroquinone dimethyl ethers of the formula ##STR1## wherein R is H or Cl are prepared by reacting p-benzoquinone tetramethyl diketals of the formula ##STR2## wherein R is defined as above, with an excess of hydrogen chloride in an aprotic solvent at a temperature from about -50.degree. to +50.degree. C. The products I are valuable intermediates for the preparation of dyestuffs, insecticides and pharmaceutics.
Claims7
A process for preparing chlorinated hydroquinone dimethyl ethers of the formula ##STR6## wherein R is hydrogen or chlorine, from quinoid starting compounds which comprises mixing p-benzoquinone tetramethyl diketals of the formula ##STR7## wherein R is defined as in the formula I, with a solution of an excess of hydrogen chloride in an aprotic solvent, at a temperature from about -50.degree. to +50.degree. C and isolating the products of the formula I thus formed.
Dependencies are inferred from the claim text.