3-methylsulfonyloxypropyl methanesulfonate

Conditions: temp:70.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: To a solution 0.15 g (0.298 mmol) of the product from step b) in 2 ml of DMF was 0.40 g (1.72 mmol) of 1,3-propandiol bismethansulfonate and 0.50 g (3.62 mmol) of K2CO3. The mixture was stirred at 70° C. overnight and partitioned between EtOAc and water. The organic phase was washed with water and brine and finally evaporated. The residue was purified by chromatography on silica furnishing 0.11 g (59%) of the sub-title compound. partitioned between EtOAc and water The organic phase was washed with water and brine finally evaporated The residue was purified by chromatography on silica furnishing 0.11 g (59%) of the sub-title compound