Ammonia → (S)-6-((1-amino-1-oxopropan-2-yl)oxy)-2-(4-(4-fluorophenoxy)phenyl)pyrimidine-4-carboxamide

Participants

Reaction Steps

A solution of (S)-ethyl 2-((6-carbamoyl-2-(4-(4-fluorophenoxy)phenyl)pyrimidin-4-yl)oxy)propanoate (0.762 g, 1.79 mmol) in 7M ammonia in methanol (10 mL, 70 mmol) was heated in a sealed tube overnight at 50° C. After cooling, the reaction mixture was evaporated in vacuo and the residue chromatographed over silica gel with 25-100% acetone in hexanes. The product fractions were evaporated in vacuo and the residue triturated with 5 mL MeOH. The solid was filtered and rinsed again with 2 mL MeOH. The MeOH filtrate and washings were evaporated in vacuo and triturated with 2 mL MeOH, filtered, and rinsed again with 1 mL MeOH. The first and second batches of solid were combined and dried under vacuum at 40° C. to give (S)-6-((1-amino-1-oxopropan-2-yl)oxy)-2-(4-(4-fluorophenoxy)phenyl)pyrimidine-4-carboxamide as a white powder (0.220 g, 0.555 mmol, 31% yield). 1H NMR (400 MHz, DMSO-d6): 8.59 (2H, d, J=8.8 Hz), 8.50 (1H, s), 7.96 (1H, s), 7.69 (1H, s), 7.33-7.25 (2H, m), 7.24 (1H, s), 7.23-7.15 (3H, m), 7.06 (2H, d, J=8.8 Hz), 5.36 (1H, q, J=6.8 Hz), 1.52 (3H, d, J=7.0 Hz). LC/MS: m/z=397.0 [M+H]+.

Provenance & Evidence