To a mixture of 1 g (3.89 mmol) of 2,5,6-trimethyl -4-oxo-N-phenyl-4H-pyran-3-carboxamide, 0.71 g (5.83 mmol) of β-phenethylamine and 5 ml of toluene, 0.4 ml of 1N solution of sodium hydroxide in methanol were added and stirred overnight at room temperature. After addition of about 10 ml of water and about 10 ml of ether, the mixture was shaken and allowed to stand. The crystals precipitated were separated by filtration and dried in vacuo to afford 1.16 g of the title compound having m.p. 191°-193° C.
