The halogenation of the adducts of nitrosobenzenes with dienes (Δ4-dihydro-1,2-oxazines) proceeds anomalously. Also, the halogenation of the O,N-diacetyl-4-aminobut-2-en-1-ols, the reduction products of the 1,2-oxazines, is anomalous; in both cases, there is no simple addition to the CC bond. The oxazines add halogens to form intermediate N-halogeno compounds, which may react further in various ways
亚硝基苯的加成物的与二烯(Δ卤化4二氢-1,2-恶嗪)异常进行。另外,1,2-恶嗪的还原产物O,N-
二乙酰基-4-
氨基丁-2-烯-1-醇的卤化是异常的。在这两种情况下,CC键都没有简单的加成。恶嗪添加卤素以形成中间体N-卤代化合物,其可以以各种方式进一步反应。
丁烯醇
氨基衍
生物被
溴化,带有相邻基团参与,得到2-
溴-4-
氨基
丁烷-1,3
-二醇。