Bromine → 2-Amino-5-bromo-3-nitrophenol

Participants

Reaction Steps

As shown in step 6-iii of Scheme 6, to a solution of 2-amino-3-nitrophenol (5.00 g, 32.4 mmol) in dioxane (50 mL) was added bromine (6.22 g, 2.01 mL, 38.9 mmol). The mixture was stirred for 2 hours and a precipitate formed, which was collected and washed with dioxane and ether. The resulting yellow solid treated with a saturated NaHCO3 solution, which was extracted with EtOAc (3×). The combined organics were dried over Na2SO4, filtered, and concentrated under reduced pressure to yield 2-amino-5-bromo-3-nitrophenol (compound 1015) as a brown solid. This material was carried on as is in subsequent reactions without further purification.

Provenance & Evidence