4-Toluenesulfonyl chloride → 3-(3,5-Difluorophenyl)propyl azide

Participants

Reaction Steps

Tosyl chloride (0.0814 mol) was added to a cooled (0°) solution of 3-(3,5-difluorophenyl)propanol (0.0407 mol) in pyridine (75 ml). The reaction was stirred 2 hours at 25°, then it was poured into ice/water and extracted into ethyl ether. The ethereal extracts were washed with 3N aqueous hydrogen chloride and water, then were dried over sodium sulfate and concentrated. The residue was dissolved in dimethylformamide (75 ml) and sodium azide (0.0814 mol) was added. The reaction was stirred 8 hours, then was diluted with water and extracted into ethyl acetate. The organic extract was washed with 3N aqueous hydrogen chloride and water, then dried over sodium sulfate and concentrated to yield 6.7 g (64%) of an oily product.

Provenance & Evidence