反应详情

To a hot solution of hexamethylene tetramine (14 g) and sodium iodide (16 g) in 140 g of ethanol was added 4-chloromethylbenzocyclobutene (15.2 g) with stirring. After standing at ambient temperature for 2-3 h, the mixture was diluted with 150 ml of water and then heated at reflux for 2 h. The resulting mixture was steam distilled and the distillate was extracted three times with ether. The combined ether extract was washed with water, dried over magnesium sulfate, and fractionally distilled to give 4-formylbenzocyclobutene: 1H NMR (CDCl3) δ 3.17 (s, 4), 7.15 (d, 1), 7.51 (s, 1), 7.67 (d, 1) and 9.86 ppm (s, 1).

1. temperatureheated
2. temperatureat reflux for 2 h
3. distillationdistilled
4. extractionthe distillate was extracted three times with ether
5. extractionThe combined ether extract
6. washwas washed with water
7. dry with materialdried over magnesium sulfate
8. distillationfractionally distilled