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Benzoic acid, 4-(hydroxyMethyl)-3-Methoxy-, Methyl ester synthesis

4synthesis methods
-

Yield:79236-96-7 52.3%

Reaction Conditions:

with water;sodium hydrogencarbonate;tetrabutylammomium bromide at 20 - 70; for 5 h;

Steps:

55.B

To a suspension of methyl 4-(bromomethyl)-3-methoxybenzoate (1 g, 3.9 mmol) in water (35 ml.) was added n-Bu4NBr (0.2 g, 0.624 mmol) and NaHCO3 (3.5 g, 42 mmol) at rt. The reaction mixture was heated to 70 0C and stirred for 5 h. The resulting solution was acidified with aqueous HCI (2 mol/L) and extracted with EtOAc. The organic layer was washed with brine, dried over anhydrous Na2SO4 and evaporated under vacuum to give the product of Step B (0.4 g, 52.3 %): 1H NMR (CDCI3, 300 MHz) δ 7.62 (dd, J = 1 1.7 and 12.6 Hz, 1 H), 7.57 (s, 1 H), 7.46 (dd, J= 0.9 and 4.5 Hz, 1 H), 4.66(s, 2 H), and 3.85 (s, 6 H).

References:

WO2009/32667,2009,A1 Location in patent:Page/Page column 180