A Novel Transformation of 4-Arylaminocoumarins to 6H-1-Benzopyranoquinolin-6-ones Under Vilsmeier-Haack Conditions
4-Aryl and 4-alkylaminocoumarins 1 were prepared by reacting of 4-hydroxycoumarin and an appropriate amine.The reaction of 1 with phosphorousoxychloride/dimethylformamide led to 6H-1-benzopyranoquinoline-6-one derivatives 2 in very good yields, whi
Tabakovic, K.,Tabakovic, I.,Ajdini, N.,Leci, O.
p. 308 - 310
(2007/10/02)
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