The regioselectivereactions of N 1 -alkyl- N 2 -(4-nitrophenyl)ethanediamide with dialkyl acetylenedicarboxylates in the presence of tert -butyl isocyanide lead to dialkyl 2-[2-(alkylamino)-2-oxoacetyl]-4-nitroanilino}-3-[( tert -butylimino)methylene]succinates in good yields.
N 1-烷基-N 2-(4-硝基苯基)乙二酰胺与乙二酸二烷基酯在叔丁基异氰化物的存在下的区域选择性反应导致生成二烷基2-[[2-(烷基氨基)-2-氧代乙酰基] -4-硝基苯胺基} -3-[(叔丁基亚氨基)亚甲基]琥珀酸酯产率高。