Organometallic Complexes of Palladium(II) Derived from 2,6-Diacetylpyridine Dimethylketal
作者:José Vicente、Aurelia Arcas、Francisco Juliá-Hernández、Delia Bautista、Peter G. Jones
DOI:10.1021/om100079x
日期:2010.7.26
with 1 equiv of PPh3 gives, in the same way as with isocyanides, an equilibrium mixture of [Pd(N1,C1-L)Cl(PPh3)] (12), 1, and trans-[Pd(C1-L)Cl(PPh3)2] (13), which is the only product when 2 equiv of PPh3 is added to the reaction mixture; and (4) with excess PPh3 affords the monoketal of dap, C5H3NC(O)Me-2}C(OMe)2Me-6} (14), and [Pd(PPh3)4]. The crystal structures of complexes 1, 2, 5b, 6a, and 7a
PdCl 2在回流的MeOH中与2,6-二乙酰基吡啶(dap)(1:1)反应,得到夹钳络合物[Pd(O 1,N 1,C 1 -L)Cl](1)和(QH)2 [ PdCl 2(μ-Cl)}] 2(2),其中L是dap单缩酮的乙酰甲基脱质子化而得到的单阴离子配体,QH为C 5 H 3 NH C(OMe)2 Me} 2 -2,6是Hdap +的双缩酮。的反应2净3在MeOH中,得到Q = C:(2 1)5H 3 N C(OMe)2 Me} 2 -2,6(3)。配合物1与2当量的RNC在0°C下反应生成反式-[Pd(C 1 -L)Cl(CNR)2 ](R = Xy = 2,6-二甲基苯基(4a),t Bu(4b))但在室温下可得到[Pd(O 2,C 2 -L R)Cl(CNR)](R = Xy(5a),t Bu(5b))。配体L R这是由于将一个异氰酸酯插入Pd-C键中以及从β-酮亚胺到β-