1-(tert-Butoxycarbonyl)-4-(p-toluenesulfonyloxy)piperidine → 5-(7-Methoxy-2,2-dimethyl-2,3-dihydro-1-benzofuran-4-yl)-4,4-dimethyl-2-piperidin-4-yl-2,4-dihydro-3H-pyrazol-3-one

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Prepared analogously as described for the example B1 (Alternative 1) using 5-(7-methoxy-2,2-dimethyl-2,3-dihydro-1-benzofuran-4-yl)-4,4-dimethyl-2,4-dihydro-3H-pyrazol-3-one (compound C5) and tert-butyl 4-{[(4-methylphenyl)sulfonyl]oxy}piperidine-1-carboxylate (compound E1) as starting compounds resulting in the hydrochloride salt of the title compound. (compound B5*HCl)

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