Boron tribromide → HCID 67450018, compound

Participants

Reaction Steps

Following General Procedure F, 2-(4-(8-methoxy-4-oxo-4,5-dihydrothieno[2,3-c]quinolin-9-yl phenyl)butanenitrile (80 mg, 0.21 mmol) in CH2Cl2 at 0° C. was added BBr3 (1.0 M in CH2Cl2, 3 mL, 3 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 light yellow solid (4.3 mg, 6%): 1H NMR (500 MHz, CD3OD) δ 7.56 (dd, J=10.8, 4.6 Hz, 3H), 7.43-7.31 (m, 3H), 7.17 (d, J=8.9 Hz, 1H), 6.00 (d, J=5.4 Hz, 1H), 4.15 (t, J=7.2 Hz, 1H), 2.07 (p, J=7.3 Hz, 2H), 1.16 (t, J=7.4 Hz, 3H): ESI MS m/z 361 [C21H16N2O2S+H]+; HPLC 98.5% (AUC), tR=12.2 min.

Provenance & Evidence