Fluoride salts-alcohols-alumina as reagents for nucleophilic substitution of chlorine atoms for alkoxy groups in 2,3-dichlorosubstituted juglones, naphthazarines, and quinizarines
作者:Victor Ph. Anufriev、Vyacheslav L. Novikov
DOI:10.1016/0040-4039(95)00295-n
日期:1995.4
Direct displacement of chlorine atoms by alkoxy groups in 2,3-dichlorosubstituted juglones (5-hydroxy-1,4-naphthoquinones), naphthazarines (5,8-dihydroxy-1,4-naphthoquinones), and quinizarines (1,4-dihydroxy-9,10-anthraquinones) is generally ineffective, however high yields are obtained when methanol or cellosolves activated by fluoride anion are used as nucleophiles and the reaction goes in the presence