Diisopropylethylamine → 1-(3,4-difluorobenzyl)-6-oxo-N-{(1R)-2-[(2-oxo-2,3-dihydro-1H-benzimidazol-5-yl)oxy]-1-phenylethyl}-1,6-dihydropyrimidine-5-carboxamide

Participants

Reaction Steps

To a solution of 5-[(2R)-2-amino-2-phenylethoxy]-1,3-dihydro-2H-benzimidazol-2-one hydrochloride (38 mg, 0.124 mmol), 1-(3,4-difluorobenzyl)-6-oxo-1,6-dihydropyrimidine-5-carboxylic acid (33.1 mg, 0.124 mmol) and N,N-diisopropylethylamine (65.1 μl, 0.373 mmol) in DMA (710 μl), O-(7-azabenzotriazol-1-yl)-N,N,N′,N′-tetramethyluronium hexafluorophosphate (54.3 mg, 0.143 mmol) was added. After stirring for 90 minutes at room temperature, the reaction mixture was diluted with water, acetonitrile, and DMSO. This solution was purified by preparative HPLC Reverse phase (C-18), eluting with Acetonitrile/Water+0.05% TFA, to afford 1-(3,4-difluorobenzyl)-6-oxo-N-{(1R)-2-[(2-oxo-2,3-dihydro-1H-benzimidazol-5-yl)oxy]-1-phenylethyl}-1,6-dihydropyrimidine-5-carboxamide as a white solid after neutralization, extraction, and drying of HPLC fractions. 1H NMR (500 MHz, C2D6SO) δ 10.51 (s, 1H), 10.38 (s, 1H), 9.73 (d, 1H), 8.95 (s, 1H), 8.67 (s, 1H), 7.52 (m, 1H), 7.41 (m, 3H), 7.34 (t, 2H), 7.25 (m, 2H), 6.74 (d, 1H), 6.49 (d, 2H), 5.36 (m, 1H), 5.19 (t, 2H), 4.26 (m, 1H), 4.19 (m, 1H). LRMS (ESI) calc'd for (C27H22F2N5O4) [M+H]+, 518.2; found 518.1.

Provenance & Evidence