Cl[C:2]1[NH:7][C:6](=[O:8])[N:5]([CH2:9][CH2:10][CH2:11][CH3:12])[C:4](=[O:13])[CH:3]=1.[NH2:14][C:15]1[CH:20]=[CH:19][C:18](CCO)=[CH:17][CH:16]=1.C(N(C(C)C)C(C)C)C.[C:33](O)(=[O:35])[CH3:34]>O>[CH2:9]([N:5]1[C:4](=[O:13])[CH:3]=[C:2]([C:18]2[CH:17]=[CH:16][C:15]([NH:14][CH2:34][CH2:33][OH:35])=[CH:20][CH:19]=2)[NH:7][C:6]1=[O:8])[CH2:10][CH2:11][CH3:12]A mixture of 6-chloro-3-n-butyluracil (10.4 g, 51.3 mmol), 2-(4-aminophenyl)ethanol (10.0 g, 72.9 mmol) and ethyldiisopropylamine (18 ml, 0.1 mol) was heated with stirring under argon on a 150° oil bath for 1 hr 20 min. The mixture was cooled to room temperature, diluted with 50 ml of water, treated with 10 ml of acetic acid and stirred for crystallization overnight. A precipitated solid was filtered, washed with 2% acetic acid, dried on filter and dissolved in 100 ml of hot 96% ethanol. To the solution 100 ml of hot water was added followed by 1.0 g of charcoal. The mixture was filtered hot and crystallized on ice. Yellow solid was collected by filtration and dried in vacuum to yield 10.7 g of 40, mp 207-208° C. 1H NMR (DMSO-d6) δ0.88 (t, 3H, J=7.3 Hz, CH3), 1.25 (m, 2H, CH2), 1.46 (m, 2H, CH2), 2.70 (t, 2H, J=6.8 Hz, CH2), 3.60 (dd, 2H, J=11.8, 6.8 Hz, CH2), 3.68 (t, 2H, J=7.3 Hz, CH2), 4.62 (t, 1H, J=5.3 Hz, OH), 4.73 (d, 1H, J=1.8 Hz, 5-H), 7.10 (d, 2H, J=8.4 Hz, ArH), 7.23 (d, 2H, J=8.4 Hz, ArH), 7.10 (s, 1H, NH), 10.37 (s, 1H, NH).
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