Tetra­methyl 1,4-dimethyl-13,14-dioxa­penta­cyclo­[8.2.1.14,7.02,9.03,8]tetra­deca-5,11-diene-5,6,11,12-tetra­carboxyl­ate

Lough, A.J.; Jack, K.; Tam, W.

doi:10.1107/S1600536812039219

Acta Crystallographica Section E

Structure Reports Online

Volume 68, Part 10 (October 2012)

organic compounds

hb6952 scheme

Acta Cryst. (2012). E68, o2961 [ doi:10.1107/S1600536812039219 ]

Tetramethyl 1,4-dimethyl-13,14-dioxapentacyclo[8.2.1.1^4,7.0^2,9.0^3,8]tetradeca-5,11-diene-5,6,11,12-tetracarboxylate

A. J. Lough, K. Jack and W. Tam

Abstract: In the title compound, C₂₂H₂₄O₁₄, the relative stereochemistry at the cyclobutane ring is cis-anti-cis and the methyl groups in the bicyclic rings are syn to each other. The two carboxylate groups attached to the same -C=C- bond are disordered over two sets of sites in a 0.603 (2):0.397 (2) ratio. In the crystal, weak C-HO hydrogen bonds connect molecules into C(12) chains along [001] incorporating R₂²₂(10) rings.