1-(tert-Butoxycarbonyl)-4-(p-toluenesulfonyloxy)piperidine → 5-[3-(cyclopropylmethoxy)-4-(difluoromethoxy)phenyl]-4,4-dimethyl-2-piperidin-4-yl-2,4-dihydro-3H-pyrazol-3-one

Participants

Reaction Steps

Prepared analogously as described for the example B1 (Alternative 1) using 5-[3-(cyclopropylmethoxy)-4-(difluoromethoxy)phenyl]-4,4-dimethyl-2,4-dihydro-3H-pyrazol-3-one (compound C3) and tert-butyl 4-(Toluene-4-sulfonyloxy)-piperidine-1-carboxylate (compound E1) as starting compounds resulting in the hydrochloride salt of the title compound. (compound B3*HCl)

Provenance & Evidence