L-(+)-Cysteine → S-(2-{4-[(4-{5-[(imidazo[1,2-a]pyridin-7-ylmethyl)carbamoyl]thiophen-2-yl}-1H-pyrazol-1-yl)methyl]-4-methylpiperidin-1-yl}-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 (0.100 g, 0.197 mmol) and 4-methylmorpholine (0.108 ml, 0.985 mmol) in N,N-diisopropylethylamine (0.5 ml) was added to 2,5-dioxopyrrolidin-1-yl 2-bromoacetate (0.056 g, 0.236 mmol) in N,N-diisopropylethylamine (0.5 ml) and stirred at room temperature. After 1 hour, (R)-2-amino-3-mercaptopropanoic acid (0.119 g, 0.985 mmol) as a solution in water (1 ml) was added. After stirring an additional 1 hour, a few drops of TFA were added to form a homogeneous solution which was purified by revere phase chromatography. The product containing peaks were lyophilized to give the title compound. 1H NMR (400 MHz, DMSO-d6) δ 9.30 (t, J=6.0 Hz, 1H), 8.86 (d, J=7.0 Hz, 1H), 8.44 (bs, 2H), 8.32 (d, J=2.0 Hz, 1H), 8.18-8.11 (m, 2H), 7.86-7.77 (m, 3H), 7.46 (dd, J=7.0, 1.5 Hz, 1H), 7.27 (dd, J=3.7, 1.8 Hz, 1H), 4.65 (d, J=5.8 Hz, 2H), 4.21-4.13 (m, 1H), 4.13-4.02 (m, 2H), 4.02-3.92 (m, 1H), 3.87-3.57 (m, 3H), 3.42-3.29 (m, 1H), 3.29-3.18 (m, 1H), 3.10 (dd, J=14.6, 4.7 Hz, 1H), 2.98 (dd, J=14.6, 7.6 Hz, 1H), 1.60-1.18 (m, 4H), 0.96 (s, 3H); MS (ESI(+)) m/e 596 (M+H)+.

Provenance & Evidence