Hydrochloric Acid → Hydrochloric Acid

Participants

Reaction Steps

A mixture of tert-butyl 5-bromo-3-{(1S)-1-[2-chloro-6-(difluoromethoxy)-3-fluorophenyl]ethyl}-1H-pyrrolo[2,3-b]pyridine-1-carboxylate (50.0 mg, 0.0962 mmol), 1-{[(4R)-2,2-dimethyl-1,3-dioxolan-4-yl]methyl}-5-methyl-4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-1H-pyrazole (46.50 mg, 0.1443 mmol), Pd(PPh3)4 (5.558 mg, 0.004810 mmol), K2CO3 (39.89 mg, 0.2886 mmol) and 4:1 dioxane:H2O (2 mL, 20 mmol) was heated to 95° C. for 2 h. The solution was cooled to rt, and 12 M of HCl in H2O (0.08017 mL, 0.9620 mmol) was added. The material was concentrated in vacuo, and extracted with DCM and sat. NaHCO3. The organic layer was dry-loaded onto silica gel and purified via column chromatography, eluting with 3-6% (7N NH3 in MeOH)/DCM. The fractions containing the pure product were concentrated in vacuo, redissolved in MeOH, and 2.0 M of HCl in Et2O (0.4810 mL, 0.9620 mmol) was added at rt. The solution was concentrated in vacuo to afford the title compound as an HCl salt. 1H NMR (400 MHz, CD3OD): δ=1.85 (d, J=7.1 Hz, 3H), 2.27 (s, 3H), 3.52-3.63 (m, 2H), 4.00-4.08 (m, 1H), 4.11-4.19 (m, 1H), 4.26 (dd, J=14.1, 4.3 Hz, 1H), 5.12 (q, J=7.2 Hz, 1H), 6.44 (br. s., 1H), 7.14 (dd, J=8.8, 4.5 Hz, 1H), 7.20 (t, J=8.7 Hz, 1H), 7.37-7.43 (m, 2H), 7.52 (s, 1H), 8.16 (d, J=2.0 Hz, 1H). MS (ES+): m/z=495.11/497.11 (100/50) [MH+]. HPLC: tR=1.29 min (polar—3 min, UPLC-ACQUITY).

Provenance & Evidence