Abstract
[formula: see text] An enantioselective formal total synthesis of roseophilin 3 is presented. The 13-membered ring of macrotricycle 1 was formed via an efficient ring-closing metathesis reaction of bicycle 4. A palladium-catalyzed methoxycarbonylation reaction of enol triflate 5 was utilized to functionalize the right-hand ring of bicycle 2. The allyl substituent was introduced by a radical allylation of alpha-bromoketone 17.
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