X-Ray Crystal Structure of 9-Methyl-3-oxo-2-oxabicyclo[4.4.0]dec-4-ene-6,9-carbolactone. Revised Structure of Iodolactonization Product of 9-Methyl-3-oxo-2-oxabicyclo[4.4.0]deca-4,8-diene-6-carboxylic Acid

Abstract

The structure of the title compound, deiodo lactone compound, was determined by X-ray crystallographic analysis: The results lead to a revision of the previously proposed structure for iodolactonization product of 9-methyl-3-oxo-2-oxabicyclo[4.4.0]deca-4,8-diene-6-carboxylic acid.