3-(2-Oxo-2,3,4,5-tetra­hydro­furan-3-yl)-1-benzofuran-2-carbonitrile

The asymmetric unit of the title compound, C₁₃H₉NO₃, consists of two crystallographically independent mol­ecules. In each mol­ecule, the tetra­hydro­furan (THF) ring adopts an envelope conformation with one of the methyl­ene C atoms positioned at the flap. The dihedral angles between the mean plane of the THF and the benzofuran ring system are 70.85 (5) and 89.59 (6)°. In the crystal, mol­ecules are stacked in a column along the a-axis direction through C—H...O hydrogen bonds, with columns further linked by C—H...N and C—H...O inter­actions.

10′-Chloro-3′,4′-dihydro-2′H-spiro­[cyclo­propane-1,7′(6′H)-pyrimido[2,1-a]isoquinolin]-6′-one

In the title compound, C₁₄H₁₃ClN₂O, the fused hydro­pyrimidine ring adopts an envelope conformation with one of the methyl­ene C atoms at the flap. The three-membered ring is approximately perpendicular to the attached isoquinoline ring system, with a dihedral angle of 89.44 (11)°. In the crystal, mol­ecules are linked by a weak C—H...π inter­action, forming a helical chain along the c axis.