4'-[2-(1-tert-butoxycarbonyl-piperidin-4-yloxy)-5-chloro-phenyl]-6-chloro-2'-(5-fluoro-2-methyl-phenyl)spiro[3H-indole-3,3'-piperidine]-2,6'(1H)-dione → 6-chloro-4'-[5-chloro-2-(4-piperidinyloxy)-phenyl]-2'-(5-fluoro-2-methyl-phenyl)spiro[3H-indole-3,3'-piperidine]-2,6'(1H)-dione

Participants

Reaction Steps

A solution of racemic (2′S,3S,4′R)-4′-[2-(1-tert-butoxycarbonyl-piperidin-4-yloxy)-5-chloro-phenyl]-6-chloro-2′-(5-fluoro-2-methyl-phenyl)spiro[3H-indole-3,3′-piperidine]-2,6′(1H)-dione (0.7 g, 1 mmol) in TFA (10 mL) was stirred at r.t. for 0.5 h. The solution was diluted with DCM, washed with 1N Na2CO3 aq. (50 mL) and brine (50 mL), dried over anhydrous Na2SO4, concentrated to give title compound as a yellow solid (Yield: 0.6 g).

Provenance & Evidence