反应详情

A solution of methyl 4-chloro-3-nitrobenzoate (28 g) in acetone (250 mL) is treated portionwise with sodium thiomethoxide (10 g) and the mixture is stirred overnight at room temperature. After filtration, the solution is concentrated and water (300 mL) is added to the residue. The yellow solid is filtered off and subjected to flash chromatography eluting with a mixture of diethyl ether and pentane (1:4 v/v), to give methyl 4-methylthio-3-nitrobenzoate (18.5 g), in the form of a yellow solid, m.p. 118°-120° C.

1. filtrationAfter filtration
2. concentrationthe solution is concentrated
3. additionwater (300 mL) is added to the residue
4. filtrationThe yellow solid is filtered off
5. washeluting with a mixture of diethyl ether and pentane (1:4 v/v)