4,5,6,9-Tetramethoxy-11-phenyl-10-oxa-11-azatricyclo[7.2.2.02,7]trideca-2(7),3,5,12-tetraen-8-one
Alvaro W. Mombrú, e-mail: [email protected]
Abstract
The crystal structure of the adduct, C21H21NO2, of tetramethylpurpurogallin with nitrosobenzene is reported. The compound exhibits a [3.2.2] bicyclic system corresponding to two seven-membered rings and one six-membered ring in distorted chair, boat and twist–boat conformations, respectively. One intramolecular and two intermolecular hydrogen bonds direct the packing and stabilize the molecule.
