A. Shchekotikhin, Y. Luzikov, O. S. Anisimova
May 1, 2006
Citations
0
Influential Citations
1
Citations
Journal
Chemistry of Heterocyclic Compounds
Abstract
On methylating 4,11-dimethoxynaphtho[2,3-f]indazole-5,10-dione with methyl iodide in the presence of base a mixture is formed of its 1-and 2-methyl derivatives. Demethylation of the methoxy groups of the starting material and of the products of its alkylation leads to the formation of 4,11-dihydroxynaphtho[2,3-f]indazole-5,10-dione (pyrazoloquinizarine) and its 1-and 2-methyl derivatives.