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首页> 外文期刊>Dalton transactions: An international journal of inorganic chemistry >N,N-Dialkyl-2-iodoanilines: A versatile source for the synthesis of Pd(II) complexes. Synthesis of novel OCP- and CCN-pincer palladium complexes
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N,N-Dialkyl-2-iodoanilines: A versatile source for the synthesis of Pd(II) complexes. Synthesis of novel OCP- and CCN-pincer palladium complexes

机译:N,N-二烷基-2-碘苯胺:合成Pd(II)配合物的通用来源。新型OCP和CCN钳式钯配合物的合成

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摘要

The reactivity of a series of N, N-dimethyl-2-iodoanilines bearing different chelating "arms" at the 3-position with Pd-2(dba)(3) has been explored. 3-[( Diphenylphosphino) methyl]-2-iodo-N, N-dimethylaniline (1) reacted with Pd-2(dba)(3) and PPh3 under aerobic conditions to give the OCP-pincer complex 4, which was formed by sequential C(sp(3))-H activation/oxidation at the alpha-position of the aniline N atom. On the other hand, under similar reaction conditions, 3-[2-(dimethylamino)ethyl]-2-iodo- N, N-dimethylaniline ( 2) afforded the CCN-pincer complex 5, after a second C -H activation process at the formyl group of the initially formed OCN-pincer complex. In contrast, 2-iodo-3-(1H-1,2, 4-triazol-1-ylmethyl)-N, N-dimethylaniline (3a) and 2-iodo-3-(pyrazol-1-ylmethyl)-N, N-dimethylaniline (3b) reacted with Pd-2(dba)(3) and PPh3, respectively, to give the 6-membered azapalladacycles 6a and 6b, in which the aniline nitrogen is merely a spectator substituent. Finally, treatment of iodide complex 6a with Tl(TfO) afforded the CN-bidentate cationic complex 8. Solid-state structures of palladium complexes 4, 5, and 8 center dot CH2Cl2 center dot 3CH(3)OH center dot 5H(2)O were determined by X-ray analysis.
机译:已研究了一系列在3位带有不同螯合“臂”的N,N-二甲基-2-碘苯胺与Pd-2(dba)(3)的反应性。 3-[((二苯基膦基)甲基] -2-碘-N,N-二甲基苯胺(1)在有氧条件下与Pd-2(dba)(3)和PPh3反应,得到OCP-钳子配合物4苯胺N原子的α位置上的连续C(sp(3))-H活化/氧化。另一方面,在相似的反应条件下,3- [2-(二甲基氨基)乙基] -2-碘-N,N-二甲基苯胺(2)在20℃下的第二次C -H活化过程后得到了CCN-钳子配合物5。最初形成的OCN-钳子复合物的甲酰基。相反,2-碘-3-(1H-1,2,4-三唑-1-基甲基)-N,N-二甲基苯胺(3a)和2-碘-3-(吡唑-1-基甲基)-N, N-二甲基苯胺(3b)分别与Pd-2(dba)(3)和PPh3反应,得到6元氮杂四环烷6a和6b,其中苯胺氮仅是一个取代基。最后,用Tl(TfO)处理碘化物络合物6a,得到CN-双齿阳离子络合物8。钯络合物4、5和8的固态结构中心点CH2Cl2中心点3CH(3)OH中心点5H(2)通过X射线分析确定O。

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