Tetrahydrofuran → 3,5-Dimethyl-4-(3'-isopropyl-4'-methoxybenzylhydroxy) anisole

Participants

Reaction Conditions

Reaction Steps

To 4-bromo-2-isopropylanisole (a compound of Formula 3 from Example 2) (12 g, 52.4 mmol) in 300 mL of THF at -78° C. was added 68 mL of tert-butyllithium (1.7 M in pentane). The reaction mixture was stirred for 10 min at -78° C. and then 2,6-dimethyl-4-methoxybenzaldehyde (a compound of Formula 6 from Example 4) (8.6 g, 52.4 mmol) was added. The reaction mixture was stirred for 1 hour at -78° C. and for 1.5 hours at room temperature, diluted with 150 mL of ether, washed with 150 mL of water, acidified with 1N HCl, and washed with 5×50 mL of brine. The organic portion was dried (MgSO4), filtered, and evaporated to give the crude product, which was purified by flash column chromatography (silica gel, 95:5 hexane/ethylacetate) to yield 3,5-dimethyl-4-(3'-isopropyl-4'-methoxybenzylhydroxy) anisole (7) (12 g, 38.2 mmol, 73%) as an oil; 1HNMR (CDCl3) δ1.2 (dd, 6H), 2.27 (s, 6H), 3.30 (heptet, 1H), 3.80 (s, 6H), 6.26 (s, 1H), 6.59 (s, 2H), 6.76 (d, 1H), 6.89 (d, 1H), 7.24 (s, 1H).

Provenance & Evidence