HCID 22049994, compound → HCID 22050368, compound

Participants

Reaction Steps

To a −20° C. solution of 5-bromo-4-[(2,4-difluorobenzyl)oxy]-1-(2,6-difluorophenyl)-2-methyl-6-oxo-1,6-dihydropyridine-3-carbaldehyde (0.659 g, 1.40 mmol) in methanol (10 mL) was added, portionwise, solid sodium borohyride (3.6 g, 96 mmol) over one hour until complete consumption of starting material by LCMS analysis. Next, the reaction mixture was diluted with 500 mL of ethyl acetate and washed with 3×200 mL of water. The resulting organic extract was Na2SO4 dried, filtered, and concentrated in vacuo to approximately 100 mL volume. The resulting liquid was diluted with hexanes (100 mL) to furnish an amorphous solid that was collected and dried at 1 mm Hg vacuum to furnish (620 mg, 94%) of the desired product. 1H NMR (400 MHz, d4-MeOH) δ 7.70 (app q, J=8.3 Hz, 1H), 7.62 (app tt, J=10.4, 6.3 Hz, 1H), 7.25 (app t, J=8.6 Hz, 2H), 7.03 (app t, J=8.6 Hz, 1H), 6.88 (app t, J=8.5 Hz, 1H), 5.31 (s, 2H), 4.58 (s, 2H), 2.17 (s, 3H); LC/MS C-18 column, tr=2.49 minutes (5 to 95% acetonitrile/water over 5 minutes at 1 ml/min with detection 254 nm, at 50° C.). ES-MS m/z 472 (M+H). ES-HRMS m/z 472.0152 (M+H calcd for C20H15BrF4NO3 requires 472.0166).

Provenance & Evidence