[摘要]:An alternative route for the synthesis of the C14-C26 building block of the anticancer drug eribulin mesylate is described. The key steps involved in the synthesis are a Julia-Kocienski olefination between aldehyde 4 and sulfone 5 and a tandem Sharpless asymmetric dihydroxylation/S(N)2 cyclisation reaction on mesyl compound 3. |