NHC ligands with a secondary pyrimidyl donor for electron-rich palladium(0) complexes
NHC ligands with a secondary pyrimidyl donor for electron-rich palladium(0) complexes
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DOI：
10.1021/om100670u
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发表时间：
2010-10
影响因子：
4
通讯作者：
S. Warsink;I. Chang;J. Weigand;P. Hauwert;Jwu-Ting Chen;C. Elsevier
中科院分区：
文献类型：
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作者：
S. Warsink;I. Chang;J. Weigand;P. Hauwert;Jwu-Ting Chen;C. Elsevier
以钯（0）（tBuDAB）（ma）与相关的银（I）配合物进行金属转移反应，合成了几种（N-2-嘧啶基-NHC）-钯（0）配合物。分析了配体的配位行为，并通过核磁共振和X-射线衍射研究了配合物的结构。该配合物是用于将炔转移氢化为Z-烯烃的活性催化剂，其活性和选择性取决于嘧啶取代基和NHC氮取代基。Z-烯烃的选择性高达97%。
Several (N-2-pyrimidyl-NHC)-palladium(0) complexes have been synthesized in very high yields and purities by transmetalation from the related silver(I) complexes with Pd0(tBuDAB)(ma). The coordination behavior of the heteroditopic ligands was analyzed, and the structure of their complexes was confirmed by NMR and X-ray diffraction studies. The complexes are active catalysts for the transfer hydrogenation of alkynes to Z-alkenes, with activity and selectivity depending on the pyrimidine substituents and the NHC nitrogen substituent. Selectivities toward the Z-alkene as high as 97% were observed.