反应详情

A mixture of 8-chloro-dibenz[b,f][1,4]oxazepine (2 g), 3,4-diethoxy-3-cyclobutene-1,2-dione (5 g), diphenylether (2 g) and dioxane (10 mL) was heated to reflux. After 2 hours, most of the dioxane was removed in vacuo and the precipitated title compound (0.75 g) was collected by filtration as yellow solid. The filtrate was treated with cold methanol when more of the title compound (1.2 g) precipitated. This material was used in Example 6 without further purification.

1. temperaturewas heated to reflux
2. custommost of the dioxane was removed in vacuo
3. customthe precipitated title compound (0.75 g)
4. filtrationwas collected by filtration as yellow solid
5. additionThe filtrate was treated with cold methanol when more of the title compound (1.2 g)
6. customprecipitated
7. customThis material was used in Example 6 without further purification