Di-tert-butyl dicarbonate → HCID 67271598, compound

Participants

Reaction Steps

A solution of (3S)-2-t-butyl 3-methyl 7-(3-t-butyl-5-(3-(2,3-dichlorophenyl)ureido)-1H-pyrazol-1-yl)-3,4-dihydroiso-quinoline-2,3 (1H)-dicarboxylate (from Example 177, 0.100 g, 0.163 mmol) in 7N NH3/MeOH (3 mL) was stirred at RT overnight. The solvent was removed under reduced pressureand the residue was dissolved in CH2Cl2 (2 mL). Boc anhydride (0.036 g, 0.163 mmol) was added and the solution was stirred at room temperature for 30 min. The solvent was evaporated and the residue was purified by column chromatography to yield (3S)-t-butyl 7-(3-t-butyl-5-(3-(2,3-dichlorophenyl)ureido)-1 H-pyrazol-1-yl)-3-carbamoyl-3,4-dihydroisoquinoline-2(1H)-carboxylate (85 mg, 87% yield) as a white solid. 1H-NMR (400 MHz, acetone-d6): δ 8.66 (brs, 1H), 8.27 (dd, J=8.4, and 2.0 Hz, 1H), 8.21 (brs, 1H), 7.42-7.37 (m, 2H), 7.35-7.29 (m, 2H), 7.24 (dd, J=8.0, and 1.6 Hz, 1H), 6.88 (brs, 1H), 6.49 (s, 1H), 6.33 (brs, 1H), 4.97-4.45 (m, 3H), 3.36-3.09 (m, 2H), 1.47-1.45 (m, 9H), 1.32 (s, 9H); MS (ESI) m/z: 601.2 (M+H+). (3S)-t-butyl 7-(3-t-butyl-5-(3-(2,3-dichlorophenyl)ureido)-1H-pyrazol-1-yl)-3-carbamoyl-3,4-dihydroisoquinoline-2(1H)-carboxylate (0.085 g, 0.14 mmol) was dissolved in 4N HCl in dioxane (5 mL) and the solution was stirred at RT for 30 min. The solvent was removed under reduced pressureand the residue was dissolved in H2O/MeCN (1:1) and lyophilized to yield 1-(3-t-butyl-1-((3S)-3-carbamoyl-1,2,3,4-tetrahydroisoquinolin-7-yl)-1 H-pyrazol-5-yl)-3-(2,3-dichlorophenyl)urea (65 mg, 85% yield) as a white solid. 1H-NMR (CD3OD) shows rotameric mixture. MS (ESI) m/z: 501.2 (M+H+).

Provenance & Evidence