Catalytic Hydrogenation of Terminal Alkenes by a (PPP) Pincer-Ligated Cobalt(II) Complex
Catalytic Hydrogenation of Terminal Alkenes by a (PPP) Pincer-Ligated Cobalt(II) Complex
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DOI：
10.1021/acs.organomet.3c00170
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发表时间：
2023-05
期刊：
影响因子：
2.8
通讯作者：
Matthew C. Fitzsimmons;Azamat Yessengazin;Gillian P. Hatzis;Jeremiah E. Stevens;C. Moore;Christine M. Thomas-Chris
中科院分区：
文献类型：
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作者：
Matthew C. Fitzsimmons;Azamat Yessengazin;Gillian P. Hatzis;Jeremiah E. Stevens;C. Moore;Christine M. Thomas-Chris
合成了一种Co（II）配合物（PPHP）CoI 2，并以KBEt 3 H为活化剂，在温和条件下（1 atm H2，室温），对该配合物作为催化剂进行了评价.发现该催化体系对末端烯烃底物（包括1，1 ′-二取代烯烃）具有活性，并且表现出适度的空气和水分稳定性。对底物范围和官能团耐受性进行了初步调查。在催化反应完成后，所观察到的唯一金属络合物被鉴定为二聚物[（PPP）CoH] 2，这表明催化活性物质可能是氢化钴单体。
A Co(II) complex, (PPHP)CoI2, was synthesized and evaluated as a precatalyst for the hydrogenation of terminal alkenes under mild conditions (1 atm H2, ambient temperature) using KBEt3H as an activator. This catalytic system was found to be active for terminal alkene substrates, including 1,1′-disubstituted alkenes, and to exhibit modest air and moisture stability. A preliminary investigation into substrate scope and functional group tolerance was performed. Upon the completion of catalytic reactions, the sole metal complex observed was identified as the dimeric species [(PPP)CoH]2suggesting that the catalytically active species may be a cobalt hydride monomer.