Carbocyclization in natural products—II : Brominative cyclization of dihydrocostunolide
作者： Tikam C. Jain , Calvin M. Banks , J.Edmund McCloskey
DOI: 10.1016/0040-4020(79)80111-8
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摘要: Abstract Treatment of dihydrocostunolide 1 with NBS in aqueous acetone at room temperature furnished bromolactones 3, 4 and 5. Structural evidence for these rests upon spectral data chemical correlations santanolide “c” 10. Mass fragmentation patterns the bromolactones, special reference to 4, have been also discussed.
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