L-(+)-Cysteine → S-{2-[(3-{4-[(4-{5-[(imidazo[1,2-a]pyridin-7-ylmethyl)carbamoyl]thiophen-2-yl}-1H-pyrazol-1-yl)methyl]-4-methylpiperidin-1-yl}-3-oxopropyl)amino]-2-oxoethyl}-L-cysteine

Participants

Reaction Steps

A suspension of N-(imidazo[1,2-a]pyridin-7-ylmethyl)-5-{1-[(4-methylpiperidin-4-yl)methyl]-1H-pyrazol-4-yl}thiophene-2-carboxamide (0.050 g, 0.099 mmol) and 4-methylmorpholine (0.054 ml, 0.493 mmol) in N,N-diisopropylethylamine (0.5 ml) was added to 2,5-dioxopyrrolidin-1-yl 3-(2-bromoacetamido)propanoate (0.036 g, 0.118 mmol) in N,N-diisopropylethylamine (0.5 ml) and the mixture was stirred at room temperature. After 1 hour, (R)-2-amino-3-mercaptopropanoic acid (0.060 g, 0.493 mmol) as a solution in water (1 ml) was added. After 1 hour, a few drops of TFA were added to form a homogeneous solution and the mixture was purified by chromatography to give the title compound. 1H NMR (400 MHz, DMSO-d6) δ 9.28 (t, J=5.9 Hz, 1H), 8.85 (d, J=7.0 Hz, 1H), 8.47 (s, 2H), 8.30 (d, J=1.9 Hz, 1H), 8.21 (t, J=5.6 Hz, 1H), 8.17-8.09 (m, 2H), 7.84 (s, 1H), 7.81-7.74 (m, 2H), 7.44 (dd, J=7.0, 1.1 Hz, 1H), 7.27 (d, J=3.8 Hz, 1H), 4.65 (d, J=5.8 Hz, 2H), 4.20 (dd, J=7.5, 4.3 Hz, 1H), 4.06 (s, 2H), 3.90-3.78 (m, 2H), 3.35-2.94 (m, 8H), 2.59-2.41 (m, 2H), 1.57-1.19 (m, 4H), 0.95 (s, 3H); MS (ESI(+)) m/e 667 (M+H)+.

Provenance & Evidence