反应详情

A mixture of 5-chloro-benzofuran-3 (2H)-one (1.68 g, 10 mmol) and (carboxymethylene)triphenylphosphorane (5.22 g, 15 mmol) was refluxed in toluene (100 ml) for 48 hrs. At the end, reaction mixture was concentrated and loaded over a silica-gel column. The column was eluted with hexane (500 ml) and later with 25% ethyl acetate. The product, ethyl(5-chloro-1-benzofuran-3-yl)acetate, was obtained as a white oil. Yield: 1.8 g (75%); 239 (M+H).

1. customAt the end, reaction mixture
2. concentrationwas concentrated
3. washThe column was eluted with hexane (500 ml) and later with 25% ethyl acetate