Abstract

The total synthesis of (−)-lauthisan as well as formal synthesis of (+)-lauthisan have been accomplished. The key step involves an unusually regioselective CC bond forming cyclization of acyclic ether to give a 8-membered cyclic ether. The regioselective cyclization is based on allylic substituent controlled intramolecular alkylation of allylic carbonate which is catalyzed by Pd(0).

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