Process for the preparation of 1,4-diamino-2,3-dicyanoanthraquinones
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United States of America Patent
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Nov 15, 1988
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N/A
app pub date -
Jan 19, 1988
filing date -
Mar 26, 1986
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Abstract
There is disclosed a process for the preparation of 1,4-diamino-2,3-dicyanoanthraquinones by reacting compounds of formula ##STR1## wherein X.sub.1 and X.sub.2 are hydroxyl, halogen, acetate or sulfato ester, or, when taken together, are an oxygen atom attached by a double bond to the boron atom, R is a substituent and n is 0, 1 or 2, with an inorganic cyanide in a polar aprotic solvent and in the presence of an oxidizing agent, and subsequently hydrolyzing the reaction product.
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