Acta Cryst. (2004). E60, o1911-o1913  [ doi:10.1107/S160053680402416X ]

5'-Aminohydroxymethylene-1',2'-dichloro-spiro[7H-pyrano[3,2-c;5,6-c']dichromene-7,4'-cyclohex-2'-ene]-3',6,6',8-tetraone dimethylformamide disolvate, a spiro compound from the reaction of 4-hydroxycoumarin with 2,3-dichloro-5,6-dicyanobenzoquinone

S.-L. Zhang, Z.-S. Huang, L.-Q. Gu and S. W. Ng

Abstract: 4-Hydroxycoumarin reacts with 2,3-dichloro-5,6-dicyanobenzoquinone to form the title compound, C₂₅H₁₁Cl₂NO₈·2C₃H₇NO, which crystallizes as an N,N-dimethylformamide disolvate. Two coumarin units are fused at their 3-position (through the spiro C atom) and at their 4-position (through an ether linkage) to give a planar moiety.

Online 9 October 2004

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