反应详情

25 g (0.09 mol) of methyl 2-chloro-3-formyl-4-methylsulfonylbenzoate (Ex. A.1.), 17.6 g (0.09 mol) of tosylmethylene isocyanide and 6.2 g (0.045 mol) of finely pulverulent potassium carbonate are stirred together with 450 ml of methanol at reflux temperature for 5 hours. The solvent was subsequently stripped off, the residue was taken up in ethyl acetate, and the mixture was extracted with water. The ethyl acetate phase was dried using sodium sulfate and concentrated.

1. temperatureat reflux temperature for 5 hours
2. extractionthe mixture was extracted with water
3. dry with materialThe ethyl acetate phase was dried
4. concentrationconcentrated