Treatment of the N-bonded enolatoiron(II)
complex [M(H)(NCCHCO2R)(L)2] [1a, M = Fe, R = Me, L =
depe 1,2-bis(diethylphosphino)ethane}; 1b, M = Fe, R = Et, L =
depe; 2, M = Ru, L = dppe] with acrylonitrile results in mono-Michael
addition to give
[M(H)NCC(C2H4CN)CO2R}(L)2
], which is found to be an active intermediate for the catalytic
double-Michael reaction of cyanoacetate with acrylonitrile.
用
丙烯腈处理 N 键烯醇
铁(II)络合物 [M(H)(NCCHCO2R)(L)2] [1a, M = Fe, R = Me, L = depe 1,2-bis(diethylphosphino)ethane}; 1b, M = Fe, R = Et, L = depe;2,M = Ru,L = dppe]与
丙烯腈发生单迈克尔加成反应,得到[M(H)NCC(C2H4CN)CO2R}(L)2 ],发现它是
氰基
乙酸酯与
丙烯腈发生催化双迈克尔反应的活性中间体。