Lawesson's reagent → 6-Bromo-3,4-dihydroquinoline-2(1H)-thione

Participants

Reaction Conditions

Reaction Steps

6-bromo-3,4-dihydroquinolin-2-(1H)-one (1.00 g, 4.42 mmol) and 2,4-bis(4-methoxyphenyl)-1,3,2,4-dithiadiphosphetane2,4-disulfide (0.895 g, 2.21 mmol) were suspended in toluene (110 mL) and then heated to 110° C. overnight. The reaction was then cooled to room temperature and concentrated under reduced pressure. Dichloromethane was added, giving a mixture that was filtered to provide the title compound: LCMS m/z 243.95 [M+2+H]+; 1H NMR (500 MHz, DMSO) δ 7.44 (s, 1H), 7.39 (d, J=8.4 Hz, 1H), 7.01 (d, J=8.4 Hz, 1H), 2.92-2.89 (m, 2H), 2.81-2.78 (m, 2H).

Provenance & Evidence