Dehydrogenation of iron amido-borane and resaturation of the imino-borane complex

We report on the first isolation and structural characterization of an iron phosphinoimino-borane complex Cp*Fe(η(2)-H(2)B[double bond, length as m-dash]NC(6)H(4)PPh(2)) by dehydrogenation of iron amido-borane precursor Cp*Fe(η(1)-H(3)B–NHC(6)H(4)PPh(2)). Significantly, regeneration of the amido-bor...

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Detalles Bibliográficos
Autores principales: Zhai, Xiaofang, Pang, Maofu, Feng, Lei, Jia, Jiong, Tung, Chen-Ho, Wang, Wenguang
Formato: Online Artículo Texto
Lenguaje:English
Publicado: The Royal Society of Chemistry 2021
Materias:
Chemistry
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8179412/
https://www.ncbi.nlm.nih.gov/pubmed/34164054
http://dx.doi.org/10.1039/d0sc06787c
Descripción
Sumario:We report on the first isolation and structural characterization of an iron phosphinoimino-borane complex Cp*Fe(η(2)-H(2)B[double bond, length as m-dash]NC(6)H(4)PPh(2)) by dehydrogenation of iron amido-borane precursor Cp*Fe(η(1)-H(3)B–NHC(6)H(4)PPh(2)). Significantly, regeneration of the amido-borane complex has been realized by protonation of the iron(ii) imino-borane to the amino-borane intermediate [Cp*Fe(η(2)-H(2)B–NHC(6)H(4)PPh(2))](+) followed by hydride transfer. These new iron species are efficient catalysts for 1,2-selective transfer hydrogenation of quinolines with ammonia borane.

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