Studies toward the total synthesis of gambieric acids, potent antifungal polycyclic ethers: convergent synthesis of a fully elaborated GHIJ-ring fragment
A stereocontrolled synthesis of a fully elaborated GHIJ-ring fragment of gambiericacids, which are potent antifungal polycyclic ether natural products, has been accomplished. The synthesis features convergentassembly of the tetracyclic polyetherskeleton through aldol coupling/cyclodehydration/reductive etherification processes and stereoselective construction of the J-ring side chain by a CeCl3-promoted
A stereocontrolled synthesis of the GHIJ-ring fragment having a side chain of gambiericacids, which are potent antifungal polycyclic ether natural products, has been achieved. The synthesis features convergentassembly of the tetracyclic polyetherskeleton by using aldol coupling and stereoselective construction of the J-ring side chain by a cerium chloride-promoted Julia–Kocienski reaction.