Reaction of N-aryl-2-nitrosoanilines with alkyl arylidenecyanoacetates in the presence of Et3N in MeCN leads to substituted 1,2,3,4-tetrahydroquinoxaline derivatives in reasonable yields. The reaction comprises nucleophilic addition of the nitrosoaniline to the Michael acceptor followed by cyclization involving the nitroso group. Since the reactive nitrogen groups in N-aryl-2-nitrosoanilines are
N-芳基-2-
亚硝基苯胺与亚芳基
氰基
乙酸烷基酯在 Et3N 存在下在 MeCN 中反应以合理的产率生成取代的
1,2,3,4-四氢喹喔啉衍
生物。该反应包括
亚硝基苯胺与迈克尔受体的亲核加成,然后是涉及亚硝基的环化。由于 N-芳基-2-
亚硝基苯胺中的活性氮基团具有相反的特性,该反应具有区域选择性,此外还发现它具有非对映选择性。