Synthesis of Iron(0) Complexes Bearing Protic NHC Ligands: Synthesis and Catalytic Activity

被引：14

作者：

Muehlen, Christoph ^{[1
]}

Linde, Jenny ^{[1
]}

Rakers, Lena ^{[2
]}

Tan, Tristan T. Y. ^{[1
]}

Kampert, Florian ^{[1
]}

Glorius, Frank ^{[2
]}

Hahn, F. Ekkehardt ^{[1
]}

机构：

[1] Westfalische Wilhelms Univ Munster, Inst Anorgan & Analyt Chem, Corrensstr 28-30, D-48149 Munster, Germany

[2] Westfalische Wilhelms Univ Munster, Organ Chem Inst, Corrensstr 40, D-48149 Munster, Germany

来源：

ORGANOMETALLICS | 2019年 / 38卷 / 12期

关键词：

N-HETEROCYCLIC CARBENE; OXIDATIVE ADDITION; TEMPLATE SYNTHESIS; AG-I; REDUCTION; CHEMISTRY; ALDEHYDES;

D O I：

10.1021/acs.organomet.9b00260

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

Preparation of iron(0) pNHC complexes by oxidative addition of N-phosphine-tethered azoles to [Fe-3(CO)(12)] is described. Phosphine-tethered imidazoles 1 and 2 react with [Fe-3(CO)(12)] to give mononuclear iron(0) complexes of type [Fe(CO)(3)(C-pNHC<^>PR2)] ([5]: R = Ph; [6]: R = Cy) bearing a Cp-NHC<^>phosphine chelate ligand. In addition, the phosphine-tethered imidazolium salt 4-Br was C2-deprotonated and reacted with [Fe(bda)(CO)(3)] (bda = benzylidene acetone) to give the iron(0) chelate complex [Fe(eta(2)-4)(CO)(3)] (7). Complexes [5], [6], and [7] act as moderate to good catalysts in the hydrogenation of acetophenone with elemental hydrogen. The N-H group of the protic NHC ligands in [5] and [6] is insignificant to the catalytic outcome.

引用

页码：2417 / 2421

页数：5

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