Applications of PC(sp3)P Iridium Complexes in Transfer Dehydrogenation of Alkanes
Applications of PC(sp3)P Iridium Complexes in Transfer Dehydrogenation of Alkanes
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DOI：
10.1021/cs500892p
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发表时间：
2014-10-01
期刊：
影响因子：
12.9
通讯作者：
Brookhart, Maurice
中科院分区：
文献类型：
--
作者：
Bezier, David;Brookhart, Maurice
合成了以PC（sp（3））P钳形三蝶烯为配体的铱乙烯配合物。研究了膦配体上带有不同取代基的配合物在烷烃转移脱氢反应中的催化作用。带有异丙基的配合物8a在180 ℃下用作1-己烯的脱氢反应的催化剂和在200 ℃下用叔丁基乙烯作为氢受体的直链和环状碱的转移脱氢反应中表现出高的稳定性和活性。带有CH 2NMe 2基团的类似络合物33允许将催化剂负载在γ-氧化铝上以用于以非均相模式操作。
Iridium ethylene complexes based on the PC(sp(3))P pincer-type triptycene ligand have been synthesized. Complexes bearing various substituents on the phosphines have been investigated as catalysts in transfer dehydrogenation of alkanes. The complex 8a, which bears isopropyl groups, has demonstrated high stability and activity when used as a catalyst in the disproportionation of 1-hexene at 180 degrees C and in the transfer dehydrogenation of linear and cyclic alkalies with tert-butylethylene as a hydrogen acceptor at 200 degrees C. A similar complex bearing a CH2NMe2 group, 33, allowed support of the catalyst on gamma-alumina for operation in a heterogeneous mode.