Ethyl 2-(4-methoxyphenoxy)-6-[3,4-(methylenedioxy)phenoxy]benzoate → 2-[(2H-1,3-Benzodioxol-5-yl)oxy]-6-(4-methoxyphenoxy)benzoic acid

Beteiligte Stoffe

Reaktionsschritte

NaOH/EtOH (0.5 M) was added to ethyl 2-(4-methoxyphenoxy)-6-[3,4-(methylenedioxy)phenoxy]benzoate (175 mg, 0.429 mmol) at 25° C. The mixture (solid and solution) was heated under reflux for 20 hr. until TLC indicated the absence of starting material and the formation of a polar material. The solvent was evaporated and the residue was diluted with H2O (7 ml, pH≈7.5) and extracted with EtOAc (2×7ml) to give 132 mg 2-(4-methoxyphenoxy)-6-[3,4-(methylenedioxy)phenoxy]benzoic acid as a yellow foam which was recrystallized from MeOH/H2O (twice) to give 102 mg of colorless needles, m.p. 164-165° C.

Herkunft & Nachweise