Practical Synthesis of <i>p‐</i> and <i>o‐</i>Amino‐ and Methoxyphenolic Anthraquinones

Abstract

New versatile and selective methods for the syntheses of substituted amino- and methoxyphenolic anthraquinones (I-IV) based on fusion of cyanophthalides (V) and semiquinone aminals (VI, VII) under basic conditions are described.