Sulfuric Acid → 1-tert-Butyl-3-chloro-5-methylbenzene

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Reaction Steps

4-t-Butyl-2-chloro-6-methylaniline (1.97 g) was dissolved in ethanol (50 ml), sulphuric acid (1.88 ml, conc.) was added dropwise and the resulting blue solution was heated at reflux. Sodium nitrite (1.72 g) was added portionwise over 30 min. The resulting mixture was heated at reflux for a further 30 rain, then cooled and was poured onto ice water and extracted with ether (2×50 ml). The ethereal extract was dried (MgSO4) and evaporated and the residue was purified on silica using hexane as eluent to afford 3-t-butyl-5-chlorotoluene as a colourless oil. 1H NMR (360 MHz, CDCl3) δ1.29 (9H, s, (CH3)3), 2.31 (3H, s, CH3), 6.98 (1H, brs, ArH), 7.05 (1H, brs, ArH), 7.15 (1H, brs, ARH). MS (CI-) m/z 181 (M+ -H, 100%).

Provenance & Evidence