Reactions of (4E)-3-Arylamino-4-(hydroxyimino)naphthalen-1(4H)-ones and (4E)-2-[Arylamino(alkylamino)]-4-(hydroxyimino)naphthalen-1(4H)-ones with 2,2-Dihydroxyindane-1,3-dione

Russian Journal of Organic Chemistry - The reactions of 3-arylamino-1,4-naphthoquinone-4-oximes with 2,2-dihydroxyindane-1,3-dione proceed without involving the oxime group and lead to...     

Oximation of 2-(R<Superscript>1</Superscript>-Amino)-4-(R<Superscript>2</Superscript>-imino)naphthalen-1(4<Emphasis Type="Italic">H</Emphasis>)-ones

The oximation of 2-(R¹-amino)-4-(R²-imino)naphthalen-1(4H)-ones with hydroxylamine hydrochloride in pyridine afforded 2-(R-amino)-4-(hydroxyimino)naphthalen-1(4H)-ones.     

Isomerization of 4-arylamino-1,2-naphthoquinones to 2-arylamino-1,4-naphthoquinones

4-Arylamino-1,2-naphthoquinones isomerize into 2-arylamino-1,4-naphthoquinones upon refluxing in acetic acid. The isomerization follows two routes via intermediate 2-hydroxy-1,4-naphthoquinone and 2-arylamino-1,4-naphthoquinone 4-N-arylimines.