Tetrabutylammonium Fluoride → 1-(5-tert-Butyl-2-p-tolyl-2H-pyrazol-3-yl)-3-{(1S,4R)-4-[3-((R)-3-hydroxy-pyrrolidin-1-yl)-[1,2,4]triazolo[4,3-a]pyridin-6-yloxy]-1,2,3,4-tetrahydro-naphthalen-1-yl}-urea

Participants

Reaction Steps

To a solution of Intermediate 38d (80 mg, 0.10 mmol) in THF (1 mL) at −30° C. was added TBAF (1M in THF, 150 μL, 0.150 mmol) and the mixture was allowed to warm to RT over 1 h. The reaction mixture was applied to an SCX-2 cartridge (5 g) and washed with MeOH. The product was eluted with 2M NH3 in MeOH; concentration in vacuo gave a residue. Purification by HPLC (C6-Ph column, 35-75% MeCN in H2O, 0.1% HCO2H) gave the title compound as a white powder after freeze-drying (22 mg, 35%). LCMS (Method 5): Rt 4.01 min, m/z 621 [MH+]. 1H NMR (400 MHz, d4-MeOH): 1.29 (9H, s), 1.86-2.13 (4H, m), 2.14-2.28 (2H, m), 2.38 (3H, s), 3.40-3.45 (1H, m), 3.49-3.56 (1H, m), 3.66-3.71 (1H, m), 3.74-3.81 (1H, m), 4.50-4.55 (1H, m), 4.85-4.91 (1H, m), 5.37 (1H, t J 4.2), 6.33 (1H, s), 7.10 (1H, dd, J 9.8, 2.2), 7.19-7.36 (8H, m), 7.43 (1H, d, J 9.8), 7.76 (1H, d, J 1.6).

Provenance & Evidence