Stannous chloride dihydrate → HCID 90413043, compound

Participants

Reaction Conditions

Reaction Steps

To a suspension of 6-bromo-2-(2-chloro-5-nitrophenyl)imidazo[1,2-a]pyrimidine (1-3) (10 g, 28.28 mmol, 1.00 equiv) in ethanol (100 ml) was added SnCl2.2H2O (12.7 g) and stirred for 12 h at 75° C. The solvent was removed under vacuum and the residue was diluted with water. The pH value of the mixture was adjusted to 8-9 with sodium bicarbonate (sat.). The solids were collected by filtration and applied onto a silica gel column with ethyl acetate/petroleum ether (2/1) to give 2.6 g (28%) of 3-[6-bromoimidazo[1,2-a]pyrimidin-2-yl]-4-chloroaniline (1-4) as a light yellow solid. 1H-NMR: (d6-DMSO, 400 MHz): 9.37 (d, J=2.4 Hz, 1H), 8.63 (d, J=2.4 Hz, 1H), 8.47 (s, 1H), 7.56 (d, J=2.8 Hz, 1H), 7.18 (d, J=8.4 Hz, 1H), 6.59 (dd, J=8.4, 2.8 Hz, 1H), 5.44 (s, 2H). EI, m/z): MS (M+H)+=325

Provenance & Evidence