Trifluoroacetic acid → HCID 67449342, compound

Participants

Reaction Steps

To a solution (R)-tert-butyl 2-(4-(2-fluoro-8-methoxy-6-methyl-4-oxo-5-((2-(trimethylsilyl)ethoxy)methyl)-4,5-dihydrothieno[2,3-c]quinolin-9-yl)phenyl)propylcarbamate (17 mg, 0.027 mmol) in CH2C2 (1 mL) at rt was added trifluoroacetic acid (1.0 mL) and the reaction was stirred at that temperature for 2 h. The mixture was concentrated and the residue was dissolved methanol (2 mL) and treated with NH4OH (2 mL). The resulting mixture was stirred at rt for 2 h and purified by preparatory HPLC (C18 silica, acetonitrile/water (with 0.05% TFA) gradient). The desired fractions were combined, concentrated and the residue was dissolved in aqueous HCl, concentrated and dried under high vacuum to afford the desired product (5 mg, 43%) as a hydrochloride salt: 1H NMR (500 MHz, CD3OD) δ 7.52 (dd, J=7.8, 1.5 Hz, 1H), 7.47 (dd, J=7.7, 1.5 Hz, 1H), 7.32 (s, 1H), 7.31-7.22 (m, 2H), 5.30 (d, J=2.7 Hz, 1H), 3.29-3.18 (m, 3H), 2.63 (s, 3H), 1.47 (d, J=6.1 Hz, 3H): ESI MS m/z 397 [C22H21FN2O2S+H]+.

Provenance & Evidence