4-cyano-1H-pyrrole-2-carboxylic acid → 4-[4-[(4-Cyano-1H-pyrrole-2-carbonyl)-amino]-3-(4-methyl-piperidin-1-yl)-phenyl]-piperazine-1-carboxylic acid tert-butyl ester

Participants

Reaction Steps

Prepared according to the procedure from Example 53 using 4-cyano-1H-pyrrole-2-carboxylic acid (as prepared in Example 2) and 4-[4-amino-3-(4-methyl-piperidin-1-yl)-phenyl]-piperazine-1-carboxylic acid tert-butyl ester as prepared in Example 15, step (c). Purification of the resulting residue by silica gel preparative TLC eluting with 20% ethyl acetate in dichloromethane afforded the title compound in 47% as an off-white solid. 1H-NMR (400 MHz, CDCl3): δ 11.13 (br s, 1H), 9.05 (s, 1H), 8.29 (d, 1H, J=8.9), 7.48 (dd, 1H, J=3.0, 1.3 Hz), 6.88 (s, 1H), 6.84 (d, 1H, J=2.6 Hz), 6.76 (dd, 1H, J=8.9, 2.2 Hz), 3.62 (m, 4H), 3.13 (m, 4H), 3.01-2.98 (m, 2H), 2.73 (m, 2H), 1.88-1.85 (m, 2H), 1.61-1.56 (m, 2H), 1.51 (s, 9H), 1.50-1.37 (m, 2H), 1.10 (d, 3H, J=6.5 Hz). LC-MS (ESI, m/z): Calcd. for C27H37N6O3, 493.3 (M+H); found: 493.1.

Provenance & Evidence