Stannous chloride dihydrate → Methyl 5-amino-2-bromobenzoate

Participants

Reaction Steps

Tin (II) chloride dihydrate (22.56 g, 100 mmol) was added to a stirred solution of methyl-2-bromo-5-nitrobenzoate (9 g, 34.61 mmol) in methanol (250 mL) and conc. HCl (25 mL). The solution was stirred at RT for 8 h and then treated with satd. aq. KHCO3 solution (600 mL). Additional solid KHCO3 (50 g) was added. The mixture was extracted with EtOAc (200 mL, 5×). The EtOAc extracts were combined, dried (MgSO4), filtered and concentrated. The residue was diluted with EtOAc (250 mL) and washed with brine (50 mL, 2×), dried (MgSO4), filtered and concentrated to obtain the title compound of this step (7.45 g, 94%) as a brown oil.

Provenance & Evidence