作者:Heinz Hoberg、Dieter Bärhausen
DOI:10.1016/0022-328x(91)86489-d
日期:1991.2
is shown that 4-pentencarboxylic acid anilide (I), which can readily be prepared catalytically from ethene and phenyl isocyanate (II), further reacts with II on ligand-nickel(0)-systems in a highly regioselective reaction to form triphenylphosphine-5-azanickelacyclopentan-4-one (Va). Protonolysis of Va leads to adipic acid anilide. When Va is treated with maleic acid anhydridge at 20°C, a β'-H-elimination
结果表明,可以很容易地由乙烯和异氰酸苯酯(II)催化制备的4-戊烯酰苯胺(I)在高度区域选择性反应中与II在配体-镍(0)系统上进一步反应形成三苯基膦- 5-氮杂nickelcyclopentan-4-one(Va)。Va的质子分解产生己二酸苯胺。当在20°C用马来酸酐处理Va时,会诱导β'-H消除,因为水解会产生高选择性的对称3-己二羧酸二苯胺(XII)。I和II在配体-镍(0)-络合物(配体=三环己基-亚磷酸酯)上的催化反应涉及β-H-消除,得到2-己二羧酸二苯胺(XI)。这开辟了由乙烯和异氰酸苯酯两步合成催化生产己二酸衍生物的可能性。