Diels-alder trapping of ortho-quinone methides. A new entry to substituted xanthene- 1,4-diones

Article abstract of DOI:10.1055/s-1998-2116

Highly regioselective Diels-Alder reactions of a non-protected β-hydroxy quinone have been achieved after formation of chelated lithium alkoxides. In this report, we demonstrate on a model system, that the selectivity of reactions based on 1,3-dioxy-subst