Pyridine → HCID 19860695, compound

Participants

Reaction Steps

To a mixture of 1-phthalimido-4-p-toluenesulfonyl-6,6-difluoro-8-hydroxy-4-aza-octane (6.75 g, 14.5 mM), dry dichloromethane (25 mL) and dry pyridine (10 mL), a solution of methanesulfonyl chloride (1.7 g) in dichloromethane (25 mL) is slowly added with stirring. The reaction mixture is kept at room temperature overnight, additional dichloromethane is added, and the reaction mixture is washed with 1N HCl (twice) and then washed with brine (twice). The resulting solution is dried (Na2SO4) and the solvent evaporated to yield an oil. Upon scratching this oil with eher/petroleum ether, the compound 1-phthalimido-4-p-toluenesulfonyl-6,6-difluoro-8-methanesulfonyloxy-4-aza-octane is obtained as white crystals: 7.64 g (97%).

Provenance & Evidence