Process for the preparation of 1,4-diamino-2,3-dicyanoanthraquinones
AssigneeCiba-Geigy Corporation
InventorJean-Marie Adam
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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.
Claims5
A compound of formula ##STR5## wherein X.sub.1 and X.sub.2 are halogen, R is alkyl, alkoxy, --CO.sub.2 alkyl, --CONHalkyl, --SO.sub.3 M or --CO.sub.2 M, wherein M is hydrogen, ammonium or an alkali metal atom, nitro, cyano or halogen, and n is 0, 1 or 2.
Dependencies are inferred from the claim text.