反应详情

Sodium thiomethoxide (8.05 g, 0.115 mol) is added portionwise to a stirred solution of methyl 3-cyclopentyloxy-4-nitrobenzoate (26.5 g, 0.1 mol) in N,N'-dimethylimidazolidinone (200 mL) at ambient temperature under an atmosphere of nitrogen and stirring continued for 4 hours. The mixture is then diluted with water (1200 mL) containing sodium chloride (200 g) and extracted with ethyl acetate (2×300 mL). The combined extract is washed with saturated brine (2×300 mL) and then evaporated under reduced pressure to give methyl 3-cyclopentyloxy-4-(methylthio)benzoate (24.4g, 91.7%) as an orange brown solid which is used without further purification.

1. extractionextracted with ethyl acetate (2×300 mL)
2. extractionThe combined extract
3. washis washed with saturated brine (2×300 mL)
4. customevaporated under reduced pressure