Diisopropylethylamine → HCID 57495362, compound

Participants

Reaction Steps

To the oxazole-4-carboxylic acid (27 mg, 0.24 mmol)) and HBTU (89 mg, 0.24 mmol) in DMF (1 mL) was added N,N-diisopropylethylamine (0.08 mL, 0.45 mmol). The mixture was stirred for 20 min and then 6-(6-methoxy-5-trifluoromethyl-pyridin-3-yl)-4-((S)-pyrrolidin-3-yloxy)-5,6,7,8-tetrahydro-pyrido[4,3-d]pyrimidine dihydrochloride (100 mg, 0.214 mmol) and additional N,N-diisopropylethylamine (0.08 mL, 0.45 mmol) were added. The mixture was allowed to stir at room temperature for 30 min. Purified by reverse phase Gilson HPLC (Method A) and subsequent neutralization of the combined fractions over PL-HCO3 MP to give {(S)-3-[6-(6-methoxy-5-trifluoromethyl-pyridin-3-yl)-5,6,7,8-tetrahydro-pyrido[4,3-d]pyrimidin-4-yloxy]-pyrrolidin-1-yl}-oxazol-4-yl-methanone as a yellow solid (38 mg, 36% yield) 1H NMR (400 MHz, DMSO-d6, 298K) δ ppm 2.11-2.39 (m, 2 H) 2.80-3.01 (m, 2 H) 3.22-4.29 (m, 11 H) 5.59-5.80 (m, 1 H) 7.72-7.94 (m, 1 H) 8.10-8.29 (m, 1 H) 8.41-8.55 (m, 1 H) 8.57-8.77 (m, 2 H) LCMS: [M+H]+=491.1, Rt(1)=1.69 min.

Provenance & Evidence