Crystal structure of methyl 2-(2H-1,3-benzodioxol-5-yl)-7,9-di-bromo-8-oxo-1-oxa-spiro-[4.5]deca-2,6,9-triene-3-car-boxyl-ate.

ABSTRACT: The title compound, C18H12Br2O6, was synthesized from Morita-Baylis-Hillman adducts. It incorporates the bromin-ated spiro-hexa-dienone moiety typically exhibited by compounds of this class that exhibit biological activity. Both the brominated cyclo-hexa-dienone and the central five-membered rings are nearly planar (r.m.s. deviations of 0.044 and 0.016?Å, respectively), being almost perpendicularly oriented [inter-planar angle = 89.47?(5)°]. With respect to the central five-membered ring, the brominated cyclo-hexa-dienone ring, the benzodioxol ring and the carboxyl-ate fragment make C-O-C-C, O-C-C-C and C-C-C-O dihedral angles of -122.11?(8), -27.20?(11) and -8.40?(12)°, respectively. An intra-molecular C-H?O hydrogen bond occurs. In the crystal, mol-ecules are linked by non-classical C-H?O and C-H?Br hydrogen bonds resulting in a molecular packing in which the brominated rings are in a head-to-head orientation, forming well marked planes parallel to the b axis.

SUBMITTER: Martins LJ 

PROVIDER: S-EPMC4257376 | biostudies-literature | 2014 Dec

REPOSITORIES: biostudies-literature