Methylamine → 4-Methoxy-2-methyl-7-nitro-2,3-dihydro-isoindol-1-one

Participants

Reaction Steps

At room temperature, a solution of 2-Bromomethyl-3-methoxy-6-nitro-benzoic acid methyl ester (crude 7.0 g, 18.2 mmol) in 46 mL of THF is treated with 2M solution of methylamine in THF (27.3 mL, 54.6 mmol), and the mixture is stirred for 4 hours at the room temperature. The reaction mixture is quenched with a saturated ammonium chloride solution and partitioned between ethyl acetate. The organic layer is washed with brine and then dried over Na2SO4 following concentrated to give 4-Methoxy-2-methyl-7-nitro-2,3-dihydro-isoindol-1-one (3.1 g) as orange solid in 77% yields (2 steps). 1H-NMR (400 MHz, δ, ppm) CDCl3: 3.19 (s, 3H), 3.99 (s, 3H), 4.32 (s, 2H), 7.0 (d, 1H), 7.89 (d, 1H).

Provenance & Evidence