反应详情

3,5-Dichloro-4-[(carboxymethyl)sulfonyl]benzoic acid ethyl ester (3.1 g) was mixed with toluene (100 mL) and pyridine (1.0 mL) and the mixture was refluxed for 30 min and then evaporated to dryness (yield 2.6 g). 1H-NMR (400 MHz, DMSO-d6) d=1.34 (t, J=7.0 Hz, 3H), 3.51 (s, 3H), 4.37 (q, J=7.0 Hz, 2H), 8.05 (s, 2H).

1. temperaturethe mixture was refluxed for 30 min
2. customevaporated to dryness (yield 2.6 g)