Tetrahydrofuran → Methyl 3-octyl-tridecanoate

Reaction equation

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