Catalytic activity of sorbents containing metals, and nucleophilicity of alcohols activated with fluoride anion in reaction of nucleophilic substitution in 2,3-dichloronaphthazarines

In reaction of 5,8-dihydroxy-2,3-dichloro-6-ethyl-7-ethoxy-1,4-naphthoquino ne and 6-tert-butyl-5,8-dihydroxy-2,3-dichloro-1,4-naphthoquinone proceedin g on the surface of molecular sieves, calcium phosphate and carbonate, neut ral alumina, or magnesium silicate with nucleophilic reagents (methanol, 2- methoxyethanol, monomethyl ethers of di- and triethylene glycols) activated with fluoride anion the yield of products decreased in this nucleophiles s eries. The most active catalysts among sorbents are alumina and magnesium s ilicate. All the sorbents are also efficient catalysts of alkoxy groups int erchange.