Acta Cryst. (2009). E65, o2228 [ doi:10.1107/S1600536809032747 ]
Abstract: The reaction of ethyl acetoacetate with meta-cresol in an acidic ionic liquid yielded a complex mixture of condensation products. 4,7-Dimethylcoumarin and the title compound, C20H22O3, were isolated. The title compound shows chemical but not crystallographic mirror symmetry. The two aromatic rings are inclined at an angle of 73.55 (6)°.
Online 22 August 2009
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