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Synthesis of (Z)-azanediylbis(ethane-2,1-diyl) dioleate TFA salt previously described. (Z)-azanediylbis(ethane-2,1-diyl) dioleate TFA salt (1.00 g, 1.58 mmol) was diluted with DCM (5 mL) and added to a pre-activated mixture of 4-(Dimethylamino) butyric acid HCl salt (317 mg, 1.89 mmol), HATU (719 mg, 1.89 mmol) and DIEA (606 uL, 3.48 mmol) in DCM (5 mL). The flask was flushed with argon and the reaction mixture stirred at room temperature overnight, then concentrated. Purification by silica gel chromatography with a DCM/MeOH gradient yielded (Z)-((4-(dimethylamino)butanoyl)azanediyl)bis(ethane-2,1-diyl) dioleate.

1. customThe flask was flushed with argon
2. concentrationconcentrated
3. customPurification by silica gel chromatography with a DCM/MeOH gradient