3-Cyanochromone may be used in the syntheses of following:2-aminochromone-3-carboxamide3-amino-4H-chromeno[3,4-d]isoxazol-4-one3-(diaminomethylene)chroman-2,4-dionefunctionalized novel spirobenzofuranones6H-bis-[1]-benzopyrano[2,3-b:3′,4′-e]pyridin-8(8H)ones and 3-(2′-hydroxybenzoyl)-5H-[1]benzopyrano[4,3-b]pyridine
