[2,3]-Sigmatropic Rearrangement of Ylides Resulting from the Reaction of a Diazomethylphosphonate with Allylic Sulfides. Synthesis of New α-Phosphorylated Unsaturated Sulfides
A new synthetic strategy towards the C27–C35 subunit of Eribulin (1) has been devised to include a protected 1,2-amino alcohol at C34–C35. Early introduction of the C35 amino group in the synthesis of 1 increases the efficiency of the route. This newapproach can be accomplished on a multi-gram scale and allows for the successful synthesis of Eribulin.