Acta Cryst. (2009). E65, o2228  [ doi:10.1107/S1600536809032747 ]

9-Ethoxy-1,5,13-trimethyl-8,10-dioxatetracyclo[7.7.1.0^2,7.0^11,16]heptadeca-2,4,6,11,13,15-hexaene

E. M. Nowakowska-Bogdan, E. Wicher, K. Ejsmont and J. Zaleski

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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