Total synthesis of urdamycinone B via C-glycosidation of an unprotected sugar and Diels–Alder reaction of C-glycosyl juglone
Abstract
The total synthesis of C-glycosyl angucycline, urdamycinone B 1, was achieved via C-glycosidation of naphthol 6 and the unprotected D-olivose 7, and Diels–Alder reaction of the unprotected C-glycosyl juglone 9 and the diene 17 as the key steps.