Dichloromethane → 9-(4-(1-(Aminomethyl)cyclobutyl)phenyl)-8-hydroxy-6-methylthieno[2,3-c]quinolin-4(5H)-one Hydrochloride

Participants

Reaction Steps

Following General Procedure F, tert-butyl (1-(4-(8-methoxy-6-methyl-4-oxo-4,5-dihydrothieno[2,3-c]quinolin-9-yl)phenyl)cyclobutyl)methylcarbamate (130 mg, 0.32 mmol was reacted with tribromoborane (1.0 M in methylene chloride, 1.9 mL, 1.9 mmol to afford the desired product (82 mg, 65%) as a white solid: 1H NMR (500 MHz, MeOD) δ 7.63 (d, J=5.4 Hz, 1H), 7.46-7.41 (m, 2H), 7.38-7.32 (m, 2H), 7.09 (d, J=0.7 Hz, 1H), 6.26 (d, J=5.4 Hz, 1H), 3.36-3.33 (m, 2H), 2.65 (dd, J=21.2, 9.3 Hz, 2H), 2.58 (s, 3H), 2.45-2.37 (m, 2H), 2.27 (ddd, J=17.7, 11.5, 8.6 Hz, 1H), 2.12-2.01 (m, 1H); ESI MS m/z 391 [C23H22N2O2S+H]+; HPLC >99% (AUC), tR=9.37 min.

Provenance & Evidence