Dichloromethane → HCID 86689538, compound

Participants

Reaction Steps

Following General Procedure F, tert-butyl 2-fluoro-4-(8-methoxy-6-methyl-4-oxo-4,5-dihydrothieno[2,3-c]quinolin-9-yl)phenethyl(methyl)carbamate (60 mg, 0.12 mmol) in CH2Cl2 at 0° C. was added BBr3 (1.0 M in CH2Cl2, 6 mL, 6 mmol) and the reaction was warmed to room temperature for 4 h. The reaction was quenched by pouring onto water or ice-water and the resulting mixture was concentrated and purified by preparatory HPLC (C18 silica, acetonitrile/water (with 0.05% TFA) gradient). The desired product was dissolved in aqueous HCl, concentrated and dried under high vacuum to afford the desired product as a off-white solid (31 mg, 67%): 1H NMR (500 MHz, (CD3OD) 7.63 (d, J=5.4 Hz, 1H), 7.51 (t, J=7.9 Hz, 1H), 7.15-7.06 (m, 3H), 6.20 (d, J=5.4 Hz, 1H), 3.42-3.35 (m, 2H), 3.30-3.10 (m, 2H), 2.80 (s, 3H), 2.57 (s, 3H); ESI MS m/z 383 [C21H11FN2O2S+H]+, HPLC >99% (AUC), tR=8.65 min.

Provenance & Evidence