Observations from aminomethylation of 7-substituted 6-hydroxyaurones

Aminomethylation of 7-substituted 6-hydroxyaurones was studied using primary and secondary amines. In the case of 6-hydroxy-7-methylaurones, their 5-dialkylaminomethyl derivatives or 7-benzylidene-3,4-dihydro-2Н-furo[3,2-g][1,3]benzoxazin-6(7Н)-ones were formed. The aminomethylation reaction of 6,7-dihydroxyaurones produced only 5-aminomethyl derivatives.