反应详情

A mixture of (4-chlorophenyl)(4-nitrophenyl)methanone (0.0382 mol), 1,2-ethanediol (0.0764 mol) and 4-methylbenzenesulfonic acid monohydrate 96% (0.19 mol) in methylbenzene (150 ml) was stirred and refluxed in a Dean Stark apparatus for 24 hours. The mixture was washed with K2CO3 (10%) and then with water. The organic layer was dried, filtered off and evaporated. The product was used without further purification, yielding 11.42 g (98%) of 2-(4-chlorophenyl)-2-(4nitro-phenyl)-1,3-dioxolane (interm. 1).

1. temperaturerefluxed in a Dean Stark apparatus for 24 hours
2. washThe mixture was washed with K2CO3 (10%)
3. customThe organic layer was dried
4. filtrationfiltered off
5. customevaporated
6. customThe product was used without further purification