Trifluoroacetic acid → 2-[1-(4-benzyl-morpholin-2-ylmethyl)-5-difluoromethoxy-1H-indazol-3-yl]-5H-pyrrolo[2,3-b]pyrazine-7-carboxylic acid tert-butylamide

Participants

Reaction Steps

To a stirred solution of 2-(1-((4-benzylmorpholin-2-yl)methyl)-5-(difluoromethoxy)-1H-indazol-3-yl)-N-tert-butyl-5-((2-(trimethylsilyl)ethoxy)methyl)-5H-pyrrolo[2,3-b]pyrazine-7-carboxamide (40 mg, 55.6 μmol) in dichloromethane (10 mL) was added trifluoroacetic acid (1 mL). After 15 h, the mixture was concentrated in vacuo then 25 mL of a Jan. 10, 1960 mixture of ammonium hydroxide/methanol/dichloromethane added. After 1 h the mixture was concentrate. Purification by chromatography (silica, 24 g Analogix column, 0-5% methanol containing 10% ammonium hydroxide in dichloromethane) gave 2-[1-(4-benzyl-morpholin-2-ylmethyl)-5-difluoromethoxy-1H-indazol-3-yl]-5H-pyrrolo[2,3-b]pyrazine-7-carboxylic acid tert-butylamide (25 mg, 76%). MS (M+H)+=590; 1H NMR (DMSO-d6) δ: 9.04 (s, 1H), 8.39 (s, 1H), 8.18 (d, J=2.3 Hz, 1H), 7.88 (d, J=4.0 Hz, 1H), 7.36-7.41 (m, 1H), 7.29-7.33 (m, 5H), 7.22-7.27 (m, 1H), 6.98-7.21 (m, 1H), 4.54-4.68 (m, 2H), 3.96-4.03 (m, 1H), 3.74 (d, J=11.0 Hz, 1H), 3.49 (s, 2H), 3.40-3.48 (m, 1H), 2.86 (d, J=11.3 Hz, 1H), 2.58 (d, J=12.3 Hz, 1H), 1.87-2.11 (m, 2H), 1.50 (s, 9H).

Provenance & Evidence