Aromatic lithiation directed by the carboxylic acid group. Synthesis of 9-substituted dibenzodioxin-1-carboxylic acids and 6-substituted phenoxathiin-4-carboxylic acids
Aromatic lithiation directed by the carboxylic acid group. Synthesis of 9-substituted dibenzodioxin-1-carboxylic acids and 6-substituted phenoxathiin-4-carboxylic acids