
Tetrahedron p. 12137 - 12158 (1996)
Update date:2022-08-03
Topics:
Wang, En Si
Choy, Yuen Min
Wong, Henry N. C.
Employing an intramolecular Michael addition as a pivotal step, butenolide 5, furans 6 and 7 have been converted to dioxaspiro compounds 8, 9, 10 and 11, whose heterocyclic frameworks constitute important structural units of prehispanolone (2) as well as 14,15-dihydroprehispanolones (3) and (4), respectively. Hispanolone (1) was converted to 2, 3 and 4 by utilizing a similar strategy.
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