Bromide ion → 7-(1-Ethylprop-1-en-1-yl)-1-methyl-4-(trifluoromethyl)-1,3-dihydro-2H-benzimidazol-2-one

Reaction equation

[Br-:20].[CH2:21]([CH3:22])[Mg+:23].[CH2:24]([CH3:25])[O:26][CH2:27][CH3:28].[CH3:1][n:2]1[c:3](=[O:19])[nH:4][c:5]2[c:6]1[c:7]([C:15]([O:16][CH3:17])=[O:18])[cH:8][cH:9][c:10]2[C:11]([F:12])([F:13])[F:14].[CH3:36][OH:37].[ClH:29].[O:30]1[CH2:31][CH2:32][CH2:33][CH2:34]1.[OH2:35]>>[CH3:1][n:2]1[c:3](=[O:19])[nH:4][c:5]2[c:6]1[c:7]([C:15](=[CH:21][CH3:22])[CH2:24][CH3:25])[cH:8][cH:9][c:10]2[C:11]([F:12])([F:13])[F:14]