Reactivity Studies of a T-Shaped Yttrium Carbene: C–F and C–O Bond Activation and C═C Bond Formation Promoted by [Y(BIPM)(I)(THF)<sub>2</sub>] (BIPM = C(PPh<sub>2</sub>NSiMe<sub>3</sub>)<sub>2</sub>)
作者:David P. Mills、William Lewis、Alexander J. Blake、Stephen T. Liddle
DOI:10.1021/om301016j
日期:2013.3.11
the reactions of 1 with the heteroallenes N,N′-dicyclohexylcarbodiimide and tert-butyl isocyanate gave the [2 + 2] cycloaddition products [YC(PPh2NSiMe3)2[C(NCy)2]-κ4C,N,N′,N″}(I)(THF)] (3) and [YC(PPh2NSiMe3)2[C(O)(NBut)]-κ4C,N,N′,O}(I)(THF)2] (4), respectively. In contrast, the reaction of 1 with tert-butyl isothiocyanate afforded the ketenimine ButN═C═C(PPh2NSiMe3)2 (5), with the concomitant formal
钇卡宾配合物[Y(BIPM)(I)(THF)2 ](1; BIPM = C(PPh 2 NSiMe 3)2)与一系列不饱和底物反应。的反应1与phosphaalkyne PCBu吨,得到[2 + 2]环加成产物[Y C(PPH 2 NSiMe 3)2(PCBu吨)-κ 4 Ç,Ç ',Ñ,Ñ '}(I)] (2)。类似地,1与杂烯基N,N的反应'-dicyclohexylcarbodiimide和叔-丁基异氰酸酯,得到[2 + 2]环加成产物[Y C(PPH 2 NSiMe 3)2 [C(NCY)2 ]-κ 4 Ç,Ñ,Ñ ',Ñ “}(I )(THF)](3)和[Y C(PPH 2 NSiMe 3)2 [C(O)(NBU吨)] - κ 4 ç,ñ,ñ ',ö }(I)(THF)2 ] (4)。相反,1与叔胺的反应丁基异硫氰酸酯,得到烯酮亚胺卜吨N═C═C(PPH 2 NSiMe 3