3-aryl-2-bromopropanoates 2a–p were prepared by reaction of ethyl acrylate with arenediazonium bromides 1a–p in the presence of CuBr (Meerwein arylation). These compounds react with selenourea to form 5-R-benzyl-2-iminoselenazolidin-4-ones 4a–p. Compounds 4a–p hydrolyze into the corresponding selenazolidin-2,4-diones.
3-芳基-
2-溴丙酸乙酯2a-p是通过
丙烯酸乙酯与
溴化
芳烃重氮
铵1a-p在CuBr(Meerwein芳基化)存在下反应制备的。这些化合物与
硒脲反应形成 5-R-benzyl-2-iminoselenazolidin-4-ones 4a–p。化合物 4a-p
水解成相应的
硒唑啉-2,4-二酮。