Reaction of chromonyl Meldrum’s acid and N-substituted 2-aminobenzamides was studied in the presence of acidic and basic catalysts. The use of methanesulfonic acid as a catalyst in this reaction led to the synthesis of chromonyl quinazolinones through employing Meldrum’s acid as a carbon leaving group. However, in the presence of basic catalyst, this reaction gave functionalized 2-pyridones.
Keywords
chromonyl Meldrum’s acid - binucleophile - acid catalysis - base catalysis - chromonyl quinazolinines - domino Michael–elimination–cyclization reaction - functionalized 2-pyridones