ChemInform Abstract: cyclo‐Trimerization of 1,4‐Naphthoquinone; Cooperation of Phenol/Quinone Additions and Redox Reactions.

Abstract The reaction course previously postulated for the cyclo‐trimerization of 1,4‐naphthoquinone (I) to cyclo‐tri‐1,4‐naphthoquinone (III) is confirmed and supplemented by: a) isolation of the red intermediate (V), b) synthesis of (III) starting from (V) or the compound (VI), a further intermediate, and c) reduction of (V) and (VI) by (II) to the bis‐hydroquinone (IV).