tert-Butyldimethylsililoxy-2-aza-1,3-butadienes react with 2H-azirine 3 leading to Diels–Alder cycloadducts in moderate yields. The reactions are endo- and regioselective with the azirine being added by its less hindered face. There is only one product in the case of 1b, 4b. There are two isomers (4 and 5) from 1a, 1c and 1d. A different result was obtained with the diene 1e. Diene 1e formed products
叔丁基二甲基甲
硅烷氧基-2-氮杂-
1,3-丁二烯与2 H-
叠氮基3反应,以中等收率生成Diels-Alder环加合物。反应是内在的和区域选择性的,通过其较少受阻的面部添加了
叠氮基。在1b,4b的情况下只有一种产品。从1a,1c和1d有两个异构体(4和5)。使用二烯1e获得了不同的结果。二烯1e形成产物4e和8。一些化合物4和5已被
水解,导致官能化的
氮丙啶7。化合物8得到
氮丙啶9。