Boron tribromide → (R)-9-(4-(1-aminopropan-2-yl)phenyl)-8-hydroxy-6-methylthieno[2,3-c]quinolin-4(5H)-one

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Reaction Steps

Following General Procedure F, (R)-tert-butyl 2-(4-(8-methoxy-6-methyl-4-oxo-4,5-dihydrothieno[2,3-c]quinolin-9-yl)phenyl)propylcarbamate (43 mg, 0.095 mmol) was reacted with tribromoborane (1.0 M in methylene chloride, 1.0 mL, 1.0 mmol) to afford the desired product (18 mg, 51%) as a grey solid: 1H NMR (300 MHz, DMSO-d6) δ 10.75-10.65 (m, 1H), 9.14 (s, 1H), 8.09 (s, 3H), 7.68 (d, J=5.4 Hz, 1H), 7.43 (d, J=8.4 Hz, 2H), 7.21 (d, J=8.3 Hz, 2H), 7.05 (s, 1H), 5.86 (d, J=5.4 Hz, 1H), 3.27-2.95 (m, 3H), 1.38 (d, J=6.6 Hz, 3H); ESI MS m/z 365 [C21H20N2O2S+H]+; HPLC 98.6%, tR=8.42 min.

Provenance & Evidence