Pure enantiomers from simple, symmetric dienophiles

Article abstract of DOI:10.1016/0957-4166(94)80092-8

Starting from p-benzoquinone or 2-cyclopentene-1,4-dione as dienophiles and the enantiomerically pure dienes 1a and 1b, high pressure cycloadditions led to chiral adducts. These were transformed in a regioselective manner to generate well defined stereoge