The present invention relates to polyhydroxylated benzophenone compounds useful in the treatment of neurodegenerative, neurological, psychiatric, and cognitive diseases, in particular those associated with a deficiency in HDAC1 deacetylase activity.

The present invention relates to polyhydroxylated benzophenone compounds useful in the treatment of neurodegenerative, neurological, psychiatric, and cognitive diseases, in particular those associated with a deficiency in HDAC1 deacetylase activity.

In a method for oxidizing 1,1-bis-(3,4-dimethylphenyl)-alkane with nitric acid in a pressure vessel to produce 3,3′,4,4′-benzophenone tetracarboxylic acid with concurrent formation of nitric oxide, passing nitric oxide from the pressure vessel into an absorption vessel and reacting nitric oxide in the absorption vessel with molecular oxygen and water to produce an aqueous nitric acid solution prevents discharge of nitric oxide, avoids the risk of oxygen inhibiting the nitric acid oxidation and reduces nitric acid consumption when the nitric acid from the absorption vessel is used for oxidizing the 1,1-bis-(3,4-dimethylphenyl)-alkane.

In a method for oxidizing 1,1-bis-(3,4-dimethylphenyl)-alkane with nitric acid in a pressure vessel to produce 3,3′,4,4′-benzophenone tetracarboxylic acid with concurrent formation of nitric oxide, passing nitric oxide from the pressure vessel into an absorption vessel and reacting nitric oxide in the absorption vessel with molecular oxygen and water to produce an aqueous nitric acid solution prevents discharge of nitric oxide, avoids the risk of oxygen inhibiting the nitric acid oxidation and reduces nitric acid consumption when the nitric acid from the absorption vessel is used for oxidizing the 1,1-bis-(3,4-dimethylphenyl)-alkane.

In a method for oxidizing 1,1-bis-(3,4-dimethylphenyl)-alkane with nitric acid in a pressure vessel to produce 3,3′,4,4′-benzophenone tetracarboxylic acid with concurrent formation of nitric oxide, passing nitric oxide from the pressure vessel into an absorption vessel and reacting nitric oxide in the absorption vessel with molecular oxygen and water to produce an aqueous nitric acid solution prevents discharge of nitric oxide, avoids the risk of oxygen inhibiting the nitric acid oxidation and reduces nitric acid consumption when the nitric acid from the absorption vessel is used for oxidizing the 1,1-bis-(3,4-dimethylphenyl)-alkane.

The present invention relates to a process for the preparation of phenyl ketones and the preparation of phenoxyphenyl derivatives.

The present invention relates to a process for the preparation of phenyl ketones and the preparation of phenoxyphenyl derivatives.

The present invention relates to polyhydroxylated benzophenone compounds useful in the treatment of neurodegenerative, neurological, psychiatric, and cognitive diseases, in particular those associated with a deficiency in HDAC1 deacetylase activity.

The present invention relates to polyhydroxylated benzophenone compounds useful in the treatment of neurodegenerative, neurological, psychiatric, and cognitive diseases, in particular those associated with a deficiency in HDAC1 deacetylase activity.

The present invention relates to polyhydroxylated benzophenone compounds useful in the treatment of neurodegenerative, neurological, psychiatric, and cognitive diseases, in particular those associated with a deficiency in HDAC1 deacetylase activity.