No abstract

No abstract

A rapid, clean, and highly efficient method for synthesis of dihydropyrano[3,2-c]chromene derivatives by one-pot, three-component condensation of aromatic aldehydes, malononitrile, and 4-hydroxycoumarin using DABCO as catalyst in solvent-free neat conditions is described. The present method has the advantages of mild reaction conditions, short reaction times, easy isolation of products, and excellent yields.

No abstract

A clean and efficient synthesis of polysubstituted benzenes has been developed via sequential vinylogous Michael addition and nucleophilic cyclization reactions of arylethylidenemalonodinitriles with arylidenemalo-nodinitriles in ionic liquid [bmim]PF6 catalyzed by L-proline