Reaction Mechanism of the C⋮N Triple Bond Cleavage of <i>β</i>-Ketonitriles on a Molybdenum(0) Center<sup>1</sup>
作者:Yoshiaki Tanabe、Hidetake Seino、Youichi Ishii、Masanobu Hidai
DOI:10.1021/ja9921928
日期:2000.3.1
molybdenum dinitrogen complex trans-[Mo(N2)2(dppe)2] (2) reacted with 2−2.5 equiv of various β-ketonitriles at room temperature to afford the (nitrido)(nitrile-enolato) complexes trans-[Mo(N)(NCCR1COR2)(dppe)2] (4; R1 = H, R2 = 4-MeOCOC6H4, 4-ClC6H4, 4-Tol, 4-MeOC6H4, 2-C4H3O, 2-C4H3S, Pri; R1 = CN, R2 = Me, Ph; dppe = Ph2PCH2CH2PPh2) via the C⋮N triple bond cleavage of the nitriles on the molybdenum center
钼二氮配合物反式-[Mo(N2)2(dppe)2] (2) 与 2-2.5 当量的各种 β-酮腈在室温下反应,得到(硝基)(腈-烯醇基)配合物反式-[Mo (N)(NCCR1COR2)(dppe)2] (4; R1 = H, R2 = 4-MeOCOC6H4, 4-ClC6H4, 4-Tol, 4-MeOC6H4, 2-C4H3O, 2-C4H3S, Pri; R1 = CN, R2 = Me, Ph; dppe = Ph2PCH2CH2PPh2) 通过钼中心上腈的 C⋮N 三键断裂。另一方面,配合物 2 与 2 当量的新戊酰乙腈在室温下反应导致分离出(亚烷基酰氨基)(腈-烯醇基)配合物反式-[Mo(NCHCH2COBut)(NCCHCOBut)(dppe)2] (5k ),其进一步经历了亚烷基酰氨基配体的 CN 双键的裂解,得到相应的 (nitrido)(nitrile-enolato)