4-Fluorobenzylamine → n-(4-Fluorobenzyl)-6-(benzyloxy)-1-isopropyl-5-oxo-1,2,3,5-tetrahydroimidazo[1,2-a]pyrimidine-7-carboxamide

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Reaction Steps

Coupling of 6-(benzyloxy)-1-isopropyl-5-oxo-1,2,3,5-tetrahydroimidazo[1,2-a]pyrimidine-7-carboxylic acid (0.300 g, 0.91 mmol) and 4-fluorobenzylamine (0.120 g, 0.96 mmol) as described for the synthesis of intermediate 3 gave 0.385 g (96% yield) of the title amide as white crystals; mp 166-167° C. (ethyl acetate). 1HNMR 400 MHz (CDCl3) δ (ppm): 1.23 (6H, d, J=6.8 Hz, 2×CH3), 3.67 (2H, t, J=9 Hz, CH2), 4.14 (2H, t, J=9 Hz, CH2), 4.42 (1H, m, CH), 4.50 (2H, d, J=6.0 Hz, NCH2), 5.09 (2H, s, OCH2), 7.0 (2H, m, aromatics), 7.25 (2H, m, aromatics), 7.3-7.37 (3H, m, aromatics), 7.46 (2H, m, aromatics), 7.69 (1H, broad t, NH). Anal. Calcd for C24H25FN4O3: C, 66.04; H, 5.77, N 12.83. Found: C, 65.84; H, 5.85; N, 12.58.

Provenance & Evidence