Bromide ion → 5-Bromo-3-hydroxy-3-methylpentanoic acid methyl ester

Reaction equation

[Br-:12].[CH2:13]([P+:14]([O:15][c:16]1[cH:17][cH:18][cH:19][cH:20][cH:21]1)([O:22][c:23]1[cH:24][cH:25][cH:26][cH:27][cH:28]1)[O:29][c:30]1[cH:31][cH:32][cH:33][cH:34][cH:35]1)[c:36]1[cH:37][cH:38][cH:39][cH:40][cH:41]1.[CH3:1][O:2][C:3]([CH2:4][C:5]([CH2:6][CH2:7][OH:8])([CH3:9])[OH:10])=[O:11].[O:42]1[CH2:43][CH2:44][CH2:45][CH2:46]1>>[CH3:1][O:2][C:3]([CH2:4][C:5]([CH2:6][CH2:7][Br:12])([CH3:9])[OH:10])=[O:11]