Total synthesis of hemibrevetoxin B was stereoselectively accomplished
based on a novel double rearrangement-ring expansion of a 6,6-membere
d ether to a 7,7-membered ether, an exclusive 6-endo-cyclization of hy
droxy styrylepoxide, and a direct introduction of a C-4 unit as the si
de chain on the A-ring. Copyright (C) 1996 Elsevier Science Ltd