反应详情

The reaction of ethyl 4-hydroxybenzoate and 4-bromo-1-butene in 2-butanone in the presence of potassium carbonate was performed as described in Example 2 to give 4-But-3-enyloxy-benzoic acid as white powder. 1H-NMR (400 MHz, d6-DMSO): 12.57 (s, —CO2H); 7.89 (d, J=6.9, 2 arom. H); 7.00 (d, J=6.9, 2 arom. H); 5.86 (m, —CH═CH2); 5.19, 5.08 (2 d-like, CH═CH2); 4.00 (t, J=6.6, OCH2—CH2—CH═CH2); 2.50 (m, OCH2—CH2—CH═CH2). 13C-NMR (100 MHz, d6-DMSO): 166.95 (—C═O); 162.08; 134.66; 131.32 (2 arom. C); 122.92; 117.14; 114.22 (2 arom. C); 66.92; 32.90.