C- and O-metallation of N-benzylideneamines by palladium (II). Synthesis and X-ray crystal structure of [Pd(2-{CHN(CH2)2−4′-(MeO)C6H4}−4,5-(MeO)2C6H2)Br(PPh3)]
作者:Joan Albert、Jaume Granell、Rosa Moragas、Mercè Font-Bardía、Xavier Solans
DOI:10.1016/0022-328x(96)06182-7
日期:1996.9
The action of Pd(AcO)2 on the imines 3,4-(MeO)2C6H3CHN(CH2)nC6H4R has been studied. Five-membered endo metallacycles were obtained from the imines 1a (R H, n = 0), 1b (R 2-MeO, n = 0), 1c (R 4-MeO, n = 1) and 1d (R = 4-MeO, n = 2) by activation of the less hindered C(aromatic)H bond. A six-membered metallacycle, containing a PdO bond, was obtained from the imine 1e, 2,4,6-(MeO)3C6H2CHNC6H5
研究了Pd(AcO)2对亚胺3,4-(MeO)2 C 6 H 3 CH = N(CH 2)n C 6 H 4 R的作用。从亚胺1a(RH,n = 0),1b(R2-MeO,n = 0),1c(R4-MeO,n = 1)和1d(R = 4-MeO,n= 2)通过较少受阻的C(芳族)H键的活化。从亚胺1e,2,4,6-(MeO)3获得了含有Pd = O键的六元金属环C 6 H 2 CH = NC 6 H 5,是通过邻位O = CH 3键之一的活化而实现的。所有这些结果表明亚胺形成内环化合物的强烈趋势以及在该过程中空间因素的重要性。可以通过PPh 3的作用获得络合物[PdBr(CN)(PPh 3)]或什至[Pd(AcO)(CN)(PPh 3)],其中乙酸盐充当单齿配体。在新型环金属化合物上。[Pd(2- CHN(CH 2)2 -4'-(MeO)C 6 H 4 } -4,5-(MeO)2