[摘要]:(+)-Phoslactomycin B (I) was synthesized by a highly enantio- and stereoselective approach involving asym. pentenylation, Suzuki-Miyaura coupling, ring-closing metathesis, asym. dihydroxylation, and Stille coupling. The synthetic method developed enables us to synthesize three other isomers concerning the C11-OH and D12-double bond.