| Summary: | In the title compound, C20H21N5O4, the ring system containing the three fused rings is essentially planar (r.m.s. deviation for all 12 non-H atoms = 0.041 Å). The phenyl ring makes a dihedral angle of 54.41 (6)° with this ring system. The isopropyl group is disordered over two positions, with site-occupancy factors of 0.753 (9) and 0.247 (9). The structure is mainly stabilized by weak intermolecular N—H...O and intramolecular C—H...O hydrogen-bonding interactions and π–π interactions, with interplanar distances of 3.415 (1) Å between adjacent furan ring centroids and 3.420 (1) Å between the benzene and pyrimidinone rings.
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