[OH:1][CH2:2][CH:3]([C:10]1[CH:18]=[CH:17][C:13]([C:14]([OH:16])=O)=[CH:12][CH:11]=1)[CH2:4][CH2:5][CH2:6][CH2:7][CH2:8][CH3:9].ClC1N=C(OC)N=C(OC)N=1.CN1CCOCC1.Cl.[CH3:38][O:39][C:40](=[O:44])[CH2:41][CH2:42][NH2:43]>ClCCl.O>[CH3:38][O:39][C:40](=[O:44])[CH2:41][CH2:42][NH:43][C:14](=[O:16])[C:13]1[CH:12]=[CH:11][C:10]([CH:3]([CH2:2][OH:1])[CH2:4][CH2:5][CH2:6][CH2:7][CH2:8][CH3:9])=[CH:18][CH:17]=14-(1-Hydroxymethyl-heptyl)-benzoic acid (500 mg, 2.00 mmol), 2-chloro-4,6-dimethoxy-1,3,5-triazine (362 mg, 2.06 mmol), and 4-methylmorpholine (230 μL, 2.10 mmol) are combined in anhydrous dichloromethane (10 mL) under nitrogen. The reaction is allowed to stir under nitrogen at room temperature overnight. Beta-alanine methyl ester hydrochloride (306 mg, 2.20 mmol) is added to the reaction mixture, followed by more 4-methyl morpholine (460 μL, 4.2 mmol), and allowed to stir at room temperature. Some water (<10% volume) is added to help solubility. The reaction is monitored by HPLC, and after 4 h, the reaction is diluted with more dichloromethane. The reaction is diluted with water and rinsed with 1N HCl. Upon acidification, the two layers are separated. The organic layer is washed with brine, dried over anhydrous sodium sulfate, and concentrated. The resulting residue is purified by flash column chromatography with hexanes/ethyl acetate to provide the title compound. MS (ES): 334.2 [M+H]−.
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