Crystal structure of 2-butylamino-3-(4-fluorophenyl) benzofuro[3,2-d]pyrimidin-4(3H)-one

The title compound (C₂₀H₁₈FN₃O₂, Mr = 351.37) is prepared and its crystal structure is determined by single crystal X-ray diffraction. The crystal is tetragonal, the P-42(1)c space group with a = 11.0922(6) ?, b = 11.0922(6) ?, c = 28.6271(15) ?, V = 3522.2(3) ?³, Z = 8, d _x = 1.325 g/cm³, F(000) = 1472, μ = 0.095 mm⁻¹, MoK _α radiation (λ = 0.71073), R = 0.0505, wR = 0.1090 for 2433 observed reflections with I > 2σ(I). The X-ray diffraction analysis reveals that all ring atoms in the benzo4,5]furo3,2-d]pyrimidinone moieties are almost coplanar.