Heptane → 4-(Benzyloxy)-3-(propan-2-yl)phenol

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Reaction Steps

4-Benzyloxy-3-isopropylphenyl acetate (5.59 kg, 19.7 mol) is added to a solution of sodium hydroxide (1.20 kg, 30.0 mol) in a mixture of water (30 L) and methanol (30 L). This solution is stirred at 24° for 1 hour. A black-colored solution develops. This is concentrated in vacuo (40°, 3 Torr) to remove the methanol. This residue is then extracted with ethyl acetate (2×16 L) and the combined organic layers are washed with aqueous sodium hydroxide (1 N, 2×10 L) and water (3×12 L). The solvent is stripped in vacuo (50°, 3 Torr) to yield an amber oil. This oil is then trimmed with heptane (10 L) for 4 hours and the allowed to stand overnight at room temperature at which time the solids are collected by filtration and washed with cold heptane (2×1 L). After air-drying, the product is further dried in vacuo (25°, 120 Torr) for 72 hours to give 4-benzyloxy-3-isopropylphenol as a low melting solid, m.p. 39°-40°.

Provenance & Evidence