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[structure: see text]. The stereoselective syntheses of the C'D'E'F'-ring system of maitotoxin and the FG-ring system of gambierol were accomplished. The key steps involve 6-endo-cyclization of methylepoxide, SmI2-induced reductive cyclization, 6-endo-cyclization of vinylepoxide, and formation of the lactone ring.
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Sakamoto et al. (2001) studied this question.
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