Hydrochloric Acid → (S)-N-((1R,2S)-1-(2,3-dihydrobenzo[b][1,4]dioxin-6-yl)-1-(1-(4-fluorophenyl)-1H-indazol-5-yloxy)propan-2-yl)pyrrolidine-2-carboxamide

Participants

Reaction Steps

(1R,2S)-1-(2,3-dihydrobenzo[b][1,4]dioxin-6-yl)-1-(1-(4-fluorophenyl)-1H-indazol-5-yloxy)propan-2-amine (19a) (102 mg, 0.24 mmol) dissolved in NMP (1 mL) was added to a solution of (S)-1-(tert-butoxycarbonyl)pyrrolidine-2-carboxylic acid (77 mg, 0.36 mmol), HATU (150 mg, 0.39 mmol) and DIPEA (170 μl, 0.97 mmol) in NMP (2 mL). The mixture was stirred at r.t. for 1 h. The reaction mixture was diluted with water (10 mL) and extracted with EtOAc (2×10 mL), the organic solution was washed with brine, dried (Na2SO4), filtered and evaporated to give an oily residue. The obtained material was dissolved in EtOAc (20 mL) and treated with 5-6N HCl in 2-Propanol (5 mL), the solution was stirred at +40° C. for 1 h. Solvents was removed by evaporation. The crude material was purified by HPLC, relevant fractions was freezedried to give the title compound as a colourless solid. Yield 21 mg (16%)

Provenance & Evidence