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Iridium and Rhodium Complexes Containing Enantiopure Primary Amine-Tethered N-Heterocyclic Carbenes: Synthesis, Characterization, Reactivity, and Catalytic Asymmetric Hydrogenation of Ketones

Autor: Robert H. Morris, Kai Y. Wan, Alan J. Lough, F. Ekkehardt Hahn, Florian Roelfes

Publikováno v: Organometallics. 37:491-504

The imidazolium salt [(S,S)-tBuNC3H3NCHPhCHPhNH2]PF6, (S,S)-11·HPF6 is a precursor to the enantiopure “Kaibene” ligand, tBu-Kaibene, (S,S)-11 featuring a tert-butyl group on the N-heterocyclic carbene (NHC) ring-nitrogen atoms. It has been prepa

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::1b281b63b421afc8d8057f01ab79f458
https://doi.org/10.1021/acs.organomet.7b00915

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Half-Sandwich Ruthenium Catalyst Bearing an Enantiopure Primary Amine Tethered to an N-Heterocyclic Carbene for Ketone Hydrogenation

Autor: Kai Y. Wan, Molly M. H. Sung, Robert H. Morris, Alan J. Lough

Publikováno v: ACS Catalysis. 7:6827-6842

By using a copper transmetalation reagent [Cu(Kaibene)2]I, the NHC ligand (S,S)-MeNC3H2NCHPhCHPhNH2 “Kaibene” was transferred to ruthenium to make a precatalyst [RuCp*(Kaibene)(MeCN)](PF6) (Cp* = 1,2,3,4,5-pentamethylcyclopentadienyl), 7, in high

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::f782332bf469fef2f2c181e865fcc23d
https://doi.org/10.1021/acscatal.7b02346

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Ketone Asymmetric Hydrogenation Catalyzed by P-NH-P′ Pincer Iron Catalysts: An Experimental and Computational Study

Autor: Robert H. Morris, Peter E. Sues, Jessica F. Sonnenberg, Kai Y. Wan

Publikováno v: ACS Catalysis. 7:316-326

Our group previously reported the development of iron carbonyl catalysts bearing chiral tridentate P–N–P′ ligands for the asymmetric hydrogenation of prochiral ketones in THF. An NMR study into the activation process identified the amine hydrid

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::6e28e3b00a1f85e20f0a5f87be6a93b1
https://doi.org/10.1021/acscatal.6b02489

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Transition Metal Complexes of an (S,S)-1,2-Diphenylethylamine-Functionalized N-Heterocyclic Carbene: A New Member of the Asymmetric NHC Ligand Family

Autor: Kai Y. Wan, Robert H. Morris, Alan J. Lough

Publikováno v: Organometallics. 35:1604-1612

By a simple SN2 reaction between N-methylimidazole and a chiral sulfamidate, the first proligand of a new class of enantiopure NHC-CHPh-CHPh-NH2 ligands can be prepared in high yield. This proligand, with the molecular formula [(S,S)-H2NCHPhCHPh-NC3H

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::924332e436bebc5e13a4c0fc665b191c
https://doi.org/10.1021/acs.organomet.6b00031

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Iron(II) Complexes Containing Unsymmetrical P–N–P′ Pincer Ligands for the Catalytic Asymmetric Hydrogenation of Ketones and Imines

Autor: Kai Y. Wan, Paraskevi O. Lagaditis, Peter E. Sues, Alan J. Lough, Robert H. Morris, Jessica F. Sonnenberg

Publikováno v: Journal of the American Chemical Society. 136:1367-1380

After their treatment with LiAlH4 and then alcohol, new iron dicarbonyl complexes mer-trans-[Fe(Br)(CO)2(P-CH═N-P')][BF4] (where P-CH═N-P' = R2PCH2CH═NCH2CH2PPh2 and R = Cy or iPr or P-CH═N-P' = (S,S)- Cy2PCH2CH═NCH(Me)CH(Ph)PPh2) are catal

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::afae6769c8cdaf99394350a51c8cb195
https://doi.org/10.1021/ja4082233

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