Trifluoroacetic acid → HCID 67200894, compound

Participants

Reaction Steps

A mixture of 4-[6-cyano-3-(1-methyl-1H-pyrazol-4-yl)-9-(2-trimethylsilanyl-ethoxymethyl)-9H-dipyrido[2,3-b;4′,3′-d]pyrrol-5-ylsulfanyl]piperidine-1-carboxylic acid tert-butyl ester (106 mg, 0.17 mmol) and trifluoroacetic acid (1 mL) in dichloromethane (9 mL) was stirred at ambient temperature for 22 h. The reaction mixture was concentrated in vacuo and the resultant residue partitioned between dichloromethane (10 mL) and a saturated aqueous solution of sodium hydrogen carbonate (10 mL). The organic phase was concentrated in vacuo and the residue was adsorbed onto HM-N then purified by flash chromatography (silica, 25 g column, Si-SPE, 0-13% (2M ammonia in MeOH) in DCM) to afford the title compound as a pale yellow solid (21.5 mg, 25%). 1H NMR (DMSO-D6, 300 MHz): 9.04 (d, J=2.2 Hz, 1H), 9.02-8.97 (m, 2H), 8.29 (s, 1H), 7.98 (s, 1H), 3.93 (s, 3H), 3.54-3.21 (m, 1H), 2.97-2.86 (m, 2H), 2.49-2.36 (m, 2H), 1.89-1.77 (m, 2H), 1.65-1.47 (m, 2H). LCMS (Method F): RT=7.08 min, M+H+=390.

Provenance & Evidence