The regioselectivereaction of N 1-benzyl- N 2-(4-nitrophenyl)ethanediamide with dialkyl acetylenedicarboxylates or alkyl propiolates in the presence of triphenylphosphine leads to dialkyl 4-benzylamino-1-(4-nitrophenyl)-5-oxo-2,5-dihydro-1 H -pyrrole-2,3-dicarboxylates or alkyl 4-benzylamino-1-(4-nitrophenyl)-2-oxo-5-pyrrolidinecarboxylates in good yields.
在三苯基膦的存在下, N 1-苄基 -N 2-(4-硝基苯基)乙二酰胺 与乙炔基二羧酸酯或丙炔酸烷基酯的区域选择性反应 导致生成二烷基4-苄基氨基-1-(4-硝基苯基)-5-氧代-2, 5-二氢-1 H- 吡咯-2,3-二羧酸酯或4-苄基氨基-1-(4-硝基苯基)-2-氧代-5-吡咯烷羧酸烷基酯,收率良好。
Regioselective reactions of N1-alkyl-N2-(4-nitrophenyl)ethanediamide and acetylenic esters in the presence of tert-butyl isocyanide
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。