Trifluoromethanesulfonic acid → HCID 22671865, compound

Participants

Reaction Steps

(6-ring): To a solution of (2RS,5RS)-(5-tert-butoxymethyl-1-methanesulfonyl-piperidin-2-yl)-methanol (2.80 g) in dichloromethane (20 ml) and cyclohexane (30 ml) was added benzyl 2,2,2-trichloroacetimidate (3.03 g) and trifluoromethanesulphonic acid (0.2 ml). The reaction mixture was stirred 1 h at room temperature, poured onto a saturated sodium bicarbonate solution and extracted with EtOAc. The organic phase was washed with brine, dried over magnesium sulphate and concentrated. The residue was chromatographed on silica gel using EtOAc/hexane 1:3 and 1:2 as eluents to obtain (2RS,5RS)-2-benzyloxymethyl-5-tert-butoxymethyl-1-methanesulfonyl-piperidine (3,6 g) as a syrup, MS: 369 (M+).

Provenance & Evidence