Tetrahedron Letters p. 7401 - 7404 (1994)
Update date:2022-07-29
Topics:
Wang, En Si
Luo, Bao Sheng
Mak, Thomas C. W.
Choy, Yuen Min
Wong, Henry N. C.
Employing an intramolecular Michael addition as a pivotal step, furan 4 has been converted to dioxaspiro compounds 5 and 6, whose heterocyclic frameworks constitute important structural units of 14,15-dihydroprehispanolone 3 and prehispanolone 1, respectively. Hispanolone 2 was converted to 3 as well as 1 by utilizing a similar strategy.
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