Acta Crystallographica Section C

Crystal Structure Communications

Volume 64, Part 2 (February 2008)

organic compounds

Acta Cryst. (2008). C64, o80-o83 [ doi:10.1107/S0108270107068850 ]

Two quinazolinones: a ring conformational study

G. Y. S. K. Swamy, B. Sridhar, K. Ravikumar and Y. S. Sadanandam

Abstract: The molecules of (±)-2-(4-methoxyphenyl)-1-phenethyl-2,3-dihydroquinazolin-4(1H)-one, C₂₃H₂₂N₂O₂, (I), and (±)-2-(1,3-benzodioxol-5-yl)-1-phenethyl-2,3-dihydroquinazolin-4(1H)-one, C₂₃H₂₀N₂O₃, (II), have T-shaped forms in the crystal structure. The tetrahydropyrimidine ring in both structures adopts a sofa conformation. Both molecules are linked by N-HO and C-HO hydrogen bonds to form sheets built from alternating R₂²(8) and R₄⁴(26) [R₄⁴(24) in (II)] edge-fused rings. Additionally, the structures are stabilized by extensive C-H [pi] interactions.

Formula: C₂₃H₂₂N₂O₂ and C₂₃H₂₀N₂O₃


	Structure factor file (CIF format) (157.6 kbytes) [ doi:10.1107/S0108270107068850/dn3077Isup2.hkl ] Contains datablock I

	Structure factor file (CIF format) (162.7 kbytes) [ doi:10.1107/S0108270107068850/dn3077IIsup3.hkl ] Contains datablock II

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