4-Toluenesulfonyl chloride → 1-(tert-Butoxycarbonyl)-4-((p-toluenesulfonyloxy)methyl)piperidine

Participants

Reaction Steps

To a solution of N-Boc-4-piperidinemethanol (5.69 g, 26.43 mmol, Aldrich) in pyridine (50 mL) cooled to 0° C. was added tosyl chloride (10.077 g, 52.86 mmol). The reaction mixture was stirred for 3 h. The mixture was then poured into ice water and stirred vigorously. The product was extracted with ethyl acetate. The organic layer was washed with water and dried over anhydrous sodium sulfate. The solids were filtered off, and the filtrate was concentrated to give a light pink oil as crude product of 4-(toluene-4-sulfonyloxymethyl)-piperidine-1-carboxylic acid tert-butyl ester (10 g). It was used without further purification.

Provenance & Evidence