Diisopropylethylamine → HCID 86680099, compound

Participants

Reaction Steps

A solution of PyBOP (692 mg, 1.33 mmol) and 5-(tert-butoxycarbonylamino)-2-(2,6-difluorophenyl)thiazole-4-carboxylic acid from Example 25 (372 mg, 1.05 mmol) in DCM (40 mL) was stirred at room temperature for 30 min. A solution of Intermediate 51, N-(1-(4-amino-1-(2,2-difluoroethyl)-1H-pyrazol-5-yl)-5-fluoroazepan-4-yl)-2,2,2-trifluoroacetamide (354 mg, 0.95 mmol) and DIPEA (0.28 mL, 1.62 mmol) in DCM (40 mL) was added and the mixture stirred at room temperature for 16 hr. The mixture was diluted with DCM (50 mL) and washed with water (20 mL). The organic layer was separated, passed through a phase separation cartridge and concentrated under reduced pressure. Purification via silica gel column chromatography (0-5% MeOH/DCM) gave tert-butyl 4-(1-(2,2-difluoroethyl)-5-(4-fluoro-5-(2,2,2-trifluoroacetamido)azepan-1-yl)-1H-pyrazol-4-ylcarbamoyl)-2-(2,6-difluorophenyl)thiazol-5-ylcarbamate as an off-white solid (600 mg, 0.84 mmol) which was dissolved in HCl in 1,4-dioxane (4 M, 10 mL, 40.0 mmol) and MeOH (10 mL) and heated in a sealed pressure vessel behind a blast shield at 60° C. for 16 hr. The solvents were removed under reduced pressure and the residue re-dissolved in MeOH and loaded onto an SCX column. The column was washed with MeOH and eluted with 0-10% 7 N ammonia in MeOH/DCM to give 203 as an off-white solid (197 mg, 40% over two steps). 1H NMR (400 MHz, CDCl3) δ 8.75 (s, 1H), 8.00 (s, 1H), 7.37-7.29 (m, 1H), 7.09-6.99 (m, 2H), 6.31-6.01 (m, 3H), 4.56-4.28 (m, 3H), 3.39-3.13 (m, 5H), 2.32-2.17 (m, 1H), 2.14-1.94 (m, 2H), 1.77-1.64 (m, 1H). Alkyl NH2 not observed. LCMS (ES+) m/z 516 (M+1).

Provenance & Evidence