Boron tribromide → HCID 67450338, compound

Participants

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)propyl(methyl)carbamate (2.08 g, 4.23 mmol) was treated with BBr3 (1.0 M in CH2Cl2, 40 mL, 40 mmol) to afford the desired product as a yellow solid (1.05 g, 65%); 1H NMR (500 MHz, CD3OD) δ 7.60-7.54 (m, 2H), 7.46 (dd, J=7.8, 1.9 Hz, 1H), 7.37 (dd, J=7.9, 1.8 Hz, 1H), 7.31 (dd, J=7.7, 1.7 Hz, 1H), 7.08 (d, J=0.8 Hz, 1H), 6.16 (d, J=5.4 Hz, 1H), 3.37-3.24 (m, 3H), 2.74 (s, 3H), 2.57 (s, 3H), 1.50 (d, J=6.8 Hz, 3H); ESI MS m/z 379 [C22H22N2O2S+H]+; HPLC >99% (AUC), tR=8.74 min.

Provenance & Evidence