Trifluoroacetic acid → HCID 178428201, compound

Participants

Reaction Conditions

Reaction Steps

A solution of 153 mg (0.348 mmol) of 4-cyano-1-(2-trimethylsilanyl-ethoxymethyl)-1H-imidazole-2-carboxylic acid [2-(4-methyl-piperidin-1-yl)-phenyl]-amide (as prepared in the previous step) in CH2Cl2 (5 mL) was treated with EtOH (1 drop) and TFA (1 mL), and the mixture was warmed to 40° C. for 2 h and left at RT for 2 days. The mixture was concentrated to dryness, taken up in CH2Cl2 (5 mL), and treated with EtOH (1 drop) and TFA (1.00 mL) at RT for 7 h. The mixture was concentrated in vacuo. The residue was taken up in MeOH (2.5 mL) and a 10% solution of acetonitrile in water (7.5 mL) to form a suspension. The solid was filtered and triturated with a minimum amount of acetone to afford 50.7 mg (34%) of the title compound as a white solid: 1H-NMR (CD3OD; 400 MHz): δ 8.35-8.32 (m, 1H), 8.03 (s, 1H), 7.29-7.26 (m, 1H), 7.15-7.12 (m, 2H), 3.09-2.99 (m, 2H), 2.81-2.74 (m, 2H), 1.85-1.80 (m, 2H), 1.72-1.56 (m, 3H), 1.09 (d, 3H, J=6.0 Hz). Mass spectrum (ESI, m/z): Calcd. for C17H19N5O, 310.2 (M+H), found 310.0.

Provenance & Evidence