Nitric Acid → 2,6-Difluoro-3-nitrotoluene

Participants

Reaction Steps

A solution of 1,3-difluoro-2-methyl-benzene (15 g, 0.12 mol) in conc. H2SO4 (100 mL) was treated drop wise with 65% HNO3 (11.4 g, 0.12 mol) at −10° C. and the resultant mixture was stirred for about 30 min. The mixture was poured into ice-water and extracted with ethyl acetate (3×200 mL). The combined organic layers were washed with brine, dried (Na2SO4) and concentrated in vacuo to give 1,3-difluoro-2-methyl-4-nitro-benzene (16 g, 78% yield) 1H NMR (400 MHz, CDCl3): δ 7.80 (m, 1 H), 6.95 (m, 1H), 2.30 (s, 3 H).

Provenance & Evidence