Back to results
US 5,208,391 AGranted
Tetracyano-1,4-hydroquinone and tetracyano-1,4-benzoquinone
AssigneeE. I. Du Pont de Nemours and Company
InventorCarlos Vazquez
Life of this patent
Estimating the term…
Abstract
Processes for the preparation of tetracyano-1,4-hydroquinone and its conversion to tetracyano-1,4-benzoquinone via a disilver salt are disclosed.
Claims7
A process for the preparation of tetracyano-1,4-hydroquinone comprising reacting a tetrasubstituted-1,4-benzoquinone selected from bromanil, chloranil, 2,3,5,6-tetramethoxy-1,4-benzoquinone or 2,3-dichloro-5,6-dicyano-1,4-benzoquinone with a source of cyanide ion to generate the desired product in a yield of at least 6%.
Dependencies are inferred from the claim text.