A new synthesis of cytotoxic (+)-7-epi-Goniofufurone
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摘要:
Cytotoxic styryl lactone, ( + )-7-epi-Goniofufurone (1), has been prepared with a new route from 3-O-beazyl-1,2-O-isopropylidene-5- C- phenyl- β- L-ido- pentofuranose (6), a derivative of ( + )-glucose. Treatment of 14 with HCl solution cleaved TBDMS and isopropylidene and simultaneously caused ring closure to afford 1 while treatment of 14 with Sc(OTf)3only removed TBDMS to give 15.