Add time:08/28/2019         Source:sciencedirect.com

The J ring segment 2 of gambieric acid was synthesized stereoselectively by the coupling between the cyclic ether component 3 and the alkenyl iodide 4. The tetrahydropyran 3 was stereoselectively synthesized by the 6-endo-cyclization of a hydroxyepoxide prepared from deoxy-d-ribose. The side chain moiety 4 was prepared by the stereoselective hydrostannation of an internal alkyne.

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