Ammonia → HCID 178461178, compound

Participants

Reaction Steps

2-{trans-3-[(S)-2-methylpiperidin-1-yl]cyclobutyl}-1,3-benzothiazole-6-carboxylic acid (Example 143B, 20 mg, 0.062 mmol) was added to a solution of oxalyl chloride (17 mg, 0.13 mmol) in CH2Cl2 (1 mL) at 23° C., followed by 1 drop of catalytic amount of DMF. The reaction mixture was allowed to stir for 1 h. Solvent and excess of oxalyl chloride were removed under vacuum, the residue solid was re-dissolved in CH2Cl2 (0.5 mL). Excess of ammonia (2 mL, 1.2 mmol) in CH2Cl2 (2 mL) was then added to the reaction vial. The reaction mixture was then stirred overnight. Solvent was removed, and the crude product was purified via HPLC (C-18 column, 0.1% TFA in acetonitrile) to give 16 mg product as a TFA salt (65%). 1H NMR (500 MHz, CD3OD): δ=8.51 ppm (m, 1H), 8.01 (m, 2H), 4.00 (m, 1H), 3.80 (m, 1H), 3.83 (m, 2H), 2.80-3.15 (m, 5H), 2.74 (m, 1H), 1.94 (m, 3H), 1.75 (m, 3H), 1.41 (m, 3H). MS (ESI, M+H+): 330.0.

Provenance & Evidence