Diisopropylethylamine → HCID 86680116, compound

Participants

Reaction Steps

To a solution of N-(1-(4-amino-1-methyl-1H-pyrazol-5-yl)-5-hydroxyazepan-4-yl)-2,2,2-trifluoroacetamide (504 mg, 1.57 mmol) in DCM (20 mL) was added DIPEA (1.65 mL, 9.42 mmol), PyBOP (1.17 mg, 2.20 mmol) and 5-(tert-butoxycarbonylamino)-2-(2,6-difluorophenyl)-thiazole-4-carboxylic acid (559 mg, 1.57 mmol) and the mixture was stirred at room temperature for 18 hr. The mixture was diluted with DCM (100 mL) and washed with water (20 mL). The organic layer was separated, dried over MgSO4 and the solvent removed under reduced pressure. Purification via silica gel column chromatography (0 to 100% EtOAc/heptane) gave tert-butyl 2-(2,6-difluorophenyl)-4-(5-(4-hydroxy-5-(2,2,2-trifluoroacetamido)azepan-1-yl)-1-methyl-1H-pyrazol-4-ylcarbamoyl)thiazol-5-ylcarbamate as an off-white solid (240 mg, 23%). This solid (240 mg, 0.36 mmol) was stirred with HCl in 1,4-dioxane (4 M, 6 mL, 24 mmol) in MeOH (5 mL) at room temperature for 18 h. The solvent was removed under reduced pressure, basified with saturated NaHCO3, and extracted with ethyl acetate (3×). The combined organic layers were dried over MgSO4 and the solvent removed under reduced pressure and the residue purified by preparative HPLC to afford 333. LCMS (ES+) m/z 464 (M+1)

Provenance & Evidence