Bromide ion → Ethyl 1-(4-chlorophenylsulfonyl)-6-ethyl-4-oxopiperidine-2-carboxylate

Reaction equation

[Br-:1].[CH2:27]1[O:28][CH2:29][CH2:30][CH2:31]1.[CH2:2]([CH3:3])[Mg+:4].[Cl:5][c:6]1[cH:7][cH:8][c:9]([S:12](=[O:13])(=[O:14])[N:15]2[CH:16]([C:22](=[O:23])[O:24][CH2:25][CH3:26])[CH2:17][C:18](=[O:21])[CH:19]=[CH:20]2)[cH:10][cH:11]1>>[CH2:2]([CH3:3])[CH:20]1[N:15]([S:12]([c:9]2[cH:8][cH:7][c:6]([Cl:5])[cH:11][cH:10]2)(=[O:13])=[O:14])[CH:16]([C:22](=[O:23])[O:24][CH2:25][CH3:26])[CH2:17][C:18](=[O:21])[CH2:19]1