A known precursor (1) of the naphthopyran antibiotics has been synthesised from the naphthoquinones (11) and (12) by reaction with the diene (5) and subsequent elaboration.
A known precursor (1) of the naphthopyran antibiotics has been synthesised from the naphthoquinones (11) and (12) by reaction with the diene (5) and subsequent elaboration.