[CH3:1][O:2][C:3]1[CH:4]=[C:5]([CH2:11][CH2:12][NH2:13])[CH:6]=[C:7]([O:9][CH3:10])[CH:8]=1.[F:14][C:15]1[CH:20]=[CH:19][C:18]([CH2:21][CH2:22][C:23](O)=[O:24])=[CH:17][CH:16]=1.C1CN([P+](ON2N=NC3C=CC=CC2=3)(N2CCCC2)N2CCCC2)CC1.F[P-](F)(F)(F)(F)F.CCN(C(C)C)C(C)C>CN(C=O)C.O>[CH3:10][O:9][C:7]1[CH:6]=[C:5]([CH2:11][CH2:12][NH:13][C:23](=[O:24])[CH2:22][CH2:21][C:18]2[CH:19]=[CH:20][C:15]([F:14])=[CH:16][CH:17]=2)[CH:4]=[C:3]([O:2][CH3:1])[CH:8]=1
2-(3,5-Dimethoxy-phenyl)ethylamine (1.20 g, 6.62 mmol) is dissolved in anhydrous DMF (50 mL), and 3-(4-fluorophenyl) propionic acid (1.113 g, 6.62 mmol), PyBOP (3.77 g) and DIPEA (2.61 mL, 15 mmol) are added. The mixture is stirred at rt for 14 h. Water (60 mL) is added, and the mixture is extracted with EtOAc (4×60 mL). The combined organic phases are washed with brine, dried over MgSO4, filtered and concentrated in vacuo. The residue is purified by silica gel column chromatography (EtOAc/Hex, 7:3) to afford the title compound as a yellow oil.
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