Unusual cascade heterocyclization of substituted m-xylenes, isobutyraldehyde and nitriles
Abstract
Mesitylene and 3,5-dimethylanisole underwent an unusual cascade condensation with isobutyraldehyde and nitriles in con-centrated sulfuric acid to form substituted 2-azaspiro[4,5]deca-1,6,9-trienes.