(Z)-1,3,4a-Trimethyl-5,5-diphenyl-6-oxa-1,3-diazabicyclo[4.2.0]octane-2,4-dione
Jun Li, Wen-Jian Tang, Jing-Bo Shi and 1 more
Acta Crystallographica Section E · 2008
doi:10.1107/s1600536808006557 (opens in a new tab)
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Abstract
The title compound, C20H20N2O3, is a head-to-tail oxetane, one of the regioisomers obtained by the the Paternó–Büchi reaction of 1,3-dimethylthymine with benzophenone. The oxetane ring is folded, the dihedral angle between the C—O—C and C—C—C planes being 14.4 (2)°. The dihedral angle between the two phenyl rings is 64.3 (2)°. The pyrimidine ring adopts a boat conformation. The crystal structure involves weak C—H...O hydrogen bonds.
Abstract licence: CC BY
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