@article {https://doi.org/10.1002/ejic.202000868,
	title = {Donor Functionalized Iron(II) N-Heterocyclic Carbene Complexes in Transfer Hydrogenation Reactions},
	journal = {European Journal of Inorganic Chemistry},
	volume = {2021},
	number = {1},
	year = {2021},
	note = {n/a},
	pages = {22-29},
	abstract = {<p>Two piano-stool iron(II) complexes bearing N-heterocyclic carbene ligands outfitted with acetamide- and amine-pendant arms [Cp*Fe(NHCR)(CO)I] {Cp* = η5-tetramethylcyclopentadienyl; R = CH2CONEt2 (3), (CH2)2NEt2 (4)}, have been prepared and fully characterized. Their catalytic activity in transfer hydrogenation (TH) of ketones using iPrOH as a hydrogen source and catalytic amounts of base (LiOtBu) has been explored, along with that of previously reported [CpFe(NHCR)(CO)I] {R = nBu (5), (CH2)2OH (6), Et (7), and (CH2)3OH (8)} complexes containing hydroxyl and nonfunctionalized alkyl arms. Complex 3 displayed the highest catalytic activity of the whole series 3{\textendash}8, reaching a TOF50 value of 533 h{\textendash}1. NMR monitoring of the stoichiometric reaction of 3 with LiOtBu, allowed the identification of a new species 3{\textquoteright} containing a deprotonated amidate moiety, which has been fully characterized by 1H, 13C, and 15N NMR. Finally, a green protocol for the reduction of ketones through TH using glycerol as a hydrogen source, under microwave irradiation in the presence of catalytic amounts of 3 and base has been developed.</p>
},
	keywords = {Carbene ligands, Iron, Ketones, Microwave irradiation, Reduction, Transfer hydrogenation},
	doi = {https://doi.org/10.1002/ejic.202000868},
	url = {https://chemistry-europe.onlinelibrary.wiley.com/doi/abs/10.1002/ejic.202000868},
	author = {Lopes, Rita and Raya-Bar{\'o}n, {\'A}lvaro and Robalo, M. Paula and Vinagreiro, Carolina and Barroso, S{\'o}nia and Rom{\~a}o, Maria J. and Fern{\'a}ndez, Ignacio and Pereira, Mariette M. and Royo, Beatriz}
}
