The mechanism and crystal structure of 2-methoxy-2-methyl-4-phenyl-3,4,4a, 10b-tetrahydro- 2H,5H-pyrano(3,2-c) chromen-5-one. Acetal of warfarin acid

Abstract

Acetal of warfarin acid has been synthesized via a hemi acetal intermediate and structurally characterized by X-ray diffraction. The crystal structure shows that the title compound was formed by the hydrolysis of warfarin acid in methanol at pH 3, with space group P21/n and unit cell parameters a = 5.859 (17), b =16.745 (5), c = 16.402 (5) ˚A, α = 90.00; β = 94.853 (4), and γ = 90.00◦.