2-Methyl-3-buten-2-ol → HCID 20491272, compound

Participants

Reaction Conditions

Reaction Steps

2,3,6-Trimethylphenol (68 g, 0.5 mol) and formic acid (100 mL) were combined and warmed to 50°-55° C. with vigorous agitation. To this mixture was added 2-methyl-3-buten-2-ol (47.3 g, 0.55 mol) dropwise over 0.25 h. The reaction mixture was stirred for an additional 2 h at 50° C., and then quenched into water (300 mL). The crude product was isolated by extraction with toluene (3×100 mL) followed by washing with water (200 mL), 5% sodium bicarbonate (2×100 mL), and brine (3×100 mL). Evaporation of the solvent and distillation afforded 61 g of the phenol, bp 145°-150° C. (2 mm). NMR (CDCl3) δ1.7 (6H, s), 2.2 (9H, s), 3.2 (2H, bd), 4.4 (1H, s, exchanged with D2O), 5.2 (1H, m), 6.8 (1H, s). IR (film) 3700, 1460, 1200, 1090 cm-1. MS (m/e) 204 (M+), 189, 174, 190, 136.

Provenance & Evidence