Benzyl Bromide → Methyl [3,5-bis(benzyloxy)phenyl]acetate

Beteiligte Stoffe

Reaktionsschritte

A mixture of (3,5-dihydroxy-phenyl)-acetic acid methyl ester (from Aldrich, 70 g, 0.385 mol), benzylbromide (137 mL, 1.16 mol), potassium carbonate (160 g, 1.16 mol) and DMF (1.5 L) under N2 was mechanically stirred at room temperature overnight. The resulting reaction mixture was poured into a mixture of 1.5 L of ice-water with stirring. The precipitate was obtained by filtration and washed with heptane successively to remove benzyl bromide to give the title compounds (123.7 g) as a brown solid which was air dried for the next reaction. 1H-NMR(CDCl3): δ 3.60 (s, 2H), 3.71(s,3H), 5.05 (s, 4H), 6.60 (s, 3H), 7.35-7.50 (m, 10H); Calcd for C23H22O4 (M+H) 363.15, Found 363.

Herkunft & Nachweise