Potassium Carbonate → 4-Methoxy-3-(2-methyl-allyloxy)benzoic acid

Participants

Reaction Steps

The reaction of methyl 3-hydroxyl-4-methoxybenzoate and 3-Bromo-2-methyl-propene in 2-butanone in the presence of potassium carbonate was performed as described in Example 2 to give 4-Methoxy-3-(2-methyl-allyloxy)-benzoic acid as white powder. 1H-NMR (400 MHz, d6-DMSO): 12.63 (s, —CO2H); 7.56 (d-like, 1 arom. H); 7.43 (m, 1 arom. H); 7.04 (m, 1 arom. H); 5.04, 4.90 (2 s, —C(CH3)═CH2); 4.48 (s, CH2—C(CH3)═CH2); 3.79 (s, OCH3); 1.75 (s, C(CH3)═CH2). 13C-NMR (100 MHz, d6-DMSO): 167.02 (—C═O); 152.90; 147.18; 140.76; 123.39; 122.84; 113.76; 112.33; 111.28; 71.56; 55.75; 19.16.

Provenance & Evidence