Tetrahydrofuran → 1-(1-Benzothiophen-5-yl)ethan-1-one

Reaction equation

[Br:13][c:14]1[s:15][c:16]2[cH:17][cH:18][cH:19][cH:20][c:21]2[cH:22]1.[Br:1][c:2]1[cH:3][c:4]2[c:5]([s:6][cH:7][cH:8]2)[cH:9][cH:10]1.[CH3:23][O:24][N:25]([C:26]([CH3:27])=[O:28])[CH3:29].[I:12].[Mg:11].[O:30]1[CH2:31][CH2:32][CH2:33][CH2:34]1>>[c:2]1([C:26]([CH3:27])=[O:28])[cH:3][c:4]2[c:5]([s:6][cH:7][cH:8]2)[cH:9][cH:10]1