(E)-3-Isopropyl-5,5-dimethyl-2-(phenyl­imino)imidazolidin-4-one

In the title compound, C₁₄H₁₉N₃O, inter­molecular N—H...O hydrogen bonds form an infinite chain along the a axis. Electron delocalizition affects the C—N bonds.

2-Diisopropyl­amino-3-phenyl­benzo[4,5]furo[3,2-d]pyrimidin-4(3H)-one

In the title compound, C₂₂H₂₃N₃O₂, the three fused rings of the benzofuro[3,2-d]pyrimidine system are almost coplanar. The packing of the mol­ecules in the crystal structure is mainly due to π–π and inter­molecular C—H...O hydrogen-bonding inter­actions.

2-Eth­oxy-3-isopropyl­benzo[4,5]thieno[3,2-d]pyrimidin-4(3H)-one

The molecule of the title compound, C₁₅H₁₆N₂O₂S, has crystallographic mirror symmetry. The crystal structure is stabilized by inter- and intra­molecular C—H...O hydrogen-bonding inter­actions.

5,6-Dianilino-3-(4-chloro­phen­yl)-3,6-dihydro-1,2,3-triazolo[4,5-d]pyrimidin-7-one

In the title compound, C₂₂H₁₆ClN₇O, all ring atoms in the triazolopyrimidinone system are almost coplanar. The packing of the mol­ecules in the crystal structure is mainly a result of π–π and N—H...N/O hydrogen-bonding inter­actions, forming a three-dimensional network.

3-(4-Methoxy­phenoxy)-2-phenyl-3H-1-benzofuro[3,2-d]pyrimidin-1-one

In the title compound, C₂₃H₁₆N₂O₄, the mol­ecules form a supramolecular structure via inter­molecular C—H...O hydrogen bonds and inter­molecular π–π inter­actions.

3-(4-Methyl­phen­yl)-2-morpholinobenzo[4,5]furo[3,2-d]pyrimidin-4(3H)-one

In the title compound, C₂₁H₁₉N₃O₃, the three fused rings of the benzofuro[3,2-d]pyrimidine system are almost coplanar. The packing of the mol­ecules in the crystal structure is mainly governed by π–π and inter­molecular C—H...O hydrogen-bonding inter­actions. The C—H...O bonds link the mol­ecules into dimers.