rearranged hemiketals (,) in 72–76% yield. Reduction of the hemiketals (,) provided an entry to a pyranonaphthoquinone with a fused γ-lactone as present in the pyranonaphthoquinone antibiotics kalafungin () and nanaomycin D ().
的
呋喃并的
硝酸铈铵氧化并[3,2- ]
萘并[2,1- ]
呋喃-8(9H) -酮(,),得到重排的半
缩酮(,在72-76%收率)。所述半
缩酮的还原(,)提供一个条目,以一个pyranonaphthoquinone与稠合的γ内酯如存在于pyranonaphthoquinone抗生素kalafungin( )和nanaomycin d( )。