title: 7,7-Dimethyl-4a-(3-methyl-2-buten-yl)-2-oxo-4a,5,6,7-tetra-hydro-2H-chromen-4-yl benzoate.
abstract: An intra-molecular Claisen-like cyclization of ethyl 2-acet-oxy-4,4-dimethyl-1-(3-methyl-but-2-en-yl)cyclo-hex-2-enecarboxylate followed by dialkyl-ation yielded the bicyclic title compound, C(23)H(26)O(4). In both of the fused six-membered rings exist fragments of four atoms which are planar, whereas the remaining two atoms deviate by up to 0.682 (3) Å on one side of the plane of the ring containing an O atom and by up to 0.415 (3) Å on opposite sides of the other ring. The dihedral anglebetween the planar fragments of the six-membered rings is 41.76 (10)°
authors.forename: Katrin
authors.initials: K
authors.lastname: Möws
authors.forename: Markus
authors.initials: M
authors.lastname: Schürmann
authors.forename: Hans
authors.initials: H
authors.lastname: Preut
authors.forename: Bernd
authors.initials: B
authors.lastname: Plietker