Abstract
The ceric ammonium nitrate oxidation of the furo[3,2- b ]naphtho[2,1- d ]furan-8(9H)-ones ( 5c , 5d ) gave the rearranged hemiketals ( 11c , 11d ) in 72–76% yield. Reduction of the hemiketals ( 11c , 11d ) provided an entry to a pyranonaphthoquinone with a fused γ-lactone as present in the pyranonaphthoquinone antibiotics kalafungin ( 6 ) and nanaomycin D ( 7 ).
Full Text 
Sign-in/Register to access full text options
Sign-in/Register to access full text options 
Paper version not known
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
