N-(tert-butoxycarbonyl)glycine → 1,1-dimethylethyl {2-[(2-{[({4-chloro-3-[(3-chloro-5-cyanophenyl)oxy]-2-fluorophenyl}methyl)amino]carbonyl}-1H-indol-5-yl)amino]-2-oxoethyl}carbamate

Participants

Reaction Steps

5-amino-N-({4-chloro-3-[(3-chloro-5-cyanophenyl)oxy]-2-fluorophenyl}methyl)-1H-indole-2-carboxamide trifluoroacetate (0.060 g, 0.0103 mmol) was treated with N-{[(1,1-dimethylethyl)oxy]carbonyl}glycine (0.018 g, 0.103 mmol), DIPEA (0.090 mL, 0.514 mmol) and bis(2-oxo-3-oxazolidinyl)phosphinic chloride (0.079 g, 0.309 mmol) in a similar manner as described herein to afford crude 1,1-dimethylethyl {2-[(2-{[({4-chloro-3-[(3-chloro-5-cyanophenyl)oxy]-2-fluorophenyl}methyl)amino]carbonyl}-1H-indol-5-yl)amino]-2-oxoethyl}carbamate (0.031 g) as an off-white solid. This material was treated with trifluoroacetic acid (0.30 mL, 3.89 mmol) in dichloromethane (1 mL) for 1 h. The solvent was evaporated to give the title compound (0.011 g, 40%) as a white solid. 1H NMR (400 Hz, DMSO-d6): δ ppm 11.60 (s, 1H), 10.23 (s, 1H), 8.97 (s, 1H), 8.04 (m, 3H), 7.91 (s, 1H), 7.77 (s, 1H), 7.40-7.54 (m, 2H), 7.29-7.40 (m, 2 H), 7.17-7.27 (m, 1H), 7.10 (s, 1H), 4.60 (s, 2H), 3.72 (s, 2H). MS: m/z 526 (M+1).

Provenance & Evidence