Hydrochloric Acid → 3-Butoxy-4'-hydroxy-2'-methyl-biphenyl-4-carbaldehyde

Participants

Reaction Conditions

Reaction Steps

A solution of 3-methyl-4-(4,4,5,5-tetramethyl-[1,3,2]dioxaborolan-2-yl)-phenol (0.210 g, 0.898 mmol) and 4-bromo-2-butoxy-benzaldehyde (0.210 g, 0.817 mmol) in 1,4-dioxane (20 mL) is evacuated and re-filled with N2 3 times. To this solution, Pd(PPh3)4 (0.010 g) and aqueous Na2CO3 (1.0 mL, 2.0 M) are added. The resulting mixture is heated at 90° C. for 24 hours under N2. The reaction mixture is cooled to room temperature, neutralized with HCl (1.0 M, 3.0 mL), and concentrated. The residue is extracted with ethyl acetate (30 mL×2), and the combined organic layers are dried over sodium sulfate and concentrated. The residue is purified via silica gel chromatography eluting with 25-30% ethyl acetate in hexanes to give the title compound (0.198 g, 85%). ES/MS m/e 283.0 (M−1).

Provenance & Evidence