K. Krohn et al., HIGHLY SUBSTITUTED ANTHRAQUINONES BY ANIONIC CYCLIZATION REACTIONS, Journal fur praktische Chemie, Chemiker-Zeitung, 338(4), 1996, pp. 349-354
Highly substituted anthraquinone esters (3a/b, 6, 20) and acids (12, 2
1) are synthesized by base induced anionic cyclizations starting from
bisalkylated naphthalenes (e.g. 10) or monoalkylated naphthoquinones (
e.g. 19).