Synthesis of nickel phenyl complexes with new chelating κ2-P,N ligands derived from α-iminoazatriphenylphosphoranes
作者:Pierre Braunstein、Jörg Pietsch、Yves Chauvin、André DeCian、Jean Fischer
DOI:10.1016/s0022-328x(98)00759-1
日期:1999.6
Reactions of the phosphorus ylide Ph3PNC(NPh)Ph (3), conveniently prepared in high yield from Ph3PNLi and ClC(NPh)Ph, with [Ni(COD)2] in the presence of a tertiary phosphine yielded the complexes [h)Ph}NPh[CPh(NPPh3)]}] (5) and [h)Ph}(PR3)] (PR3=PMe3 (6a), PMe2Ph (6b), PMePh2 (6c)) which result from oxidative addition of a P–Ph bond to the Ni(0) centre. When PTol3 was used, only 5 could be isolated
磷叶立德的Ph反应3 PNC(NPh)PH(3),方便地以高产率制得在pH 3 PNLi和CLC(NPh)PH,与[镍(COD)2在叔存在]膦,得到配合物[ 1H)博士} NPH [CPh(NPPh 3)]}](5)和[ 1H)博士}(PR 3)](PR 3 = PME 3(图6a),PME 2博士(6b),PMePh 2(6c))是由P-Ph键氧化加成到Ni(0)中心而产生的。当使用PTol 3时,只有5可以分离出来,而其他膦则根据其空间需求而生成相应的配合物6a-c和5的变化量。所述的反应Ñ甲基化的磷叶立德博士3 PN-本人](1-甲基-2-(triphenylphosphoranylideneamino)苯并咪唑(7)),与[镍(COD)2 ]在PTOL的存在3,得到络合物[我]}(PTol 3)](9)。对于非甲基化类似物Ph 3 PN– H](2-(三苯基磷酰亚氨