Boron tribromide → 9-[4-(2-Aminopropan-2-yl)phenyl]-6-chloro-8-hydroxythieno[2,3-c]quinolin-4(5H)-one Hydrochloride

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Reaction Steps

Following General Procedure F, tert-butyl 2-[4-(6-chloro-8-methoxy-4-oxo-4,5-dihydrothieno[2,3-c]quinolin-9-yl)phenyl]propan-2-ylcarbamate (10 mg, 0.020 mmol) was reacted with tribromoborane (1.0 M in methylene chloride, 1.0 mL, 1.0 mmol) to afford the desired product (9.7 mg, 97%) as an off-white solid: 1H NMR (500 MHz, CD3OD) δ 7.71 (d, J=8.4 Hz, 2H), 7.60 (d, J=5.4 Hz, 1H), 7.42 (d, J=8.4 Hz, 2H), 7.30 (s, 1H), 6.06 (d, J=5.4 Hz, 1H), 1.86 (s, 6H); ESI MS m/z 385 [C20H17ClN2O2S+H]+; HPLC >99% (AUC), tR=10.89 min

Provenance & Evidence