@article {2622,
	title = {Bis- and Mono(amidate) Complexes of Yttrium: Synthesis, Characterization, and Use as Precatalysts for the Hydroamination of Aminoalkenes},
	journal = {Organometallics},
	volume = {28},
	number = {14},
	year = {2009},
	note = {ISI Document Delivery No.: 473AWTimes Cited: 11Cited Reference Count: 47Stanlake, Louisa J. E. Schafer, Laurel L.},
	month = {Jul},
	pages = {3990-3998},
	type = {Article},
	abstract = {A high-yielding synthetic route is disclosed for yttrium bis- and mono(amidate) complexes using the reaction of amide proligand and Y(N(SiMe3)(2))(3) starting materials. The structure, bonding, and solution phase characterization data for this new class of complexes are presented. The modular nature of the amidate ligand allows for easy addition of electron-withdrawing CF3 groups in the ligand backbone to tune electronic properties of the resulting precatalysts. The amidate ligands in the bis(amidate) complexes were found to be highly fluxional on the NMR time scale, while the mono(amidate) yttrium complex required heating to 110 degrees C before ligand redistribution was observed. Three bis(amidate) complexes with differing electronic properties and one mono(amidate) complex have been used as precatalysts for hydroamination using a wide range of aminoalkene substrates. Bis(amidate) complexes bearing the more electron-withdrawing amidate ligands were found to be the most active precatalysts for intramolecular alkene hydroamination.},
	keywords = {ALKENES, AMIDATE COMPLEXES, ASYMMETRIC HYDROAMINATION, EARTH, GROUP-3, HYDROAMINATION, INTRAMOLECULAR, LANTHANIDE, LIGANDS, metals, OLEFINS, ORGANOLANTHANIDE-CATALYZED HYDROAMINATION},
	isbn = {0276-7333},
	url = {<Go to ISI>://000268176700006},
	author = {Stanlake, L. J. E. and Schafer, L. L.}
}
@article {2495,
	title = {Broadening the Scope of Group 4 Hydroamination Catalysis Using a Tethered Ureate Ligand},
	journal = {Journal of the American Chemical Society},
	volume = {131},
	number = {51},
	year = {2009},
	note = {ISI Document Delivery No.: 543YATimes Cited: 12Cited Reference Count: 34Leitch, David C. Payne, Philippa R. Dunbar, Christine R. Schafer, Laurel L.},
	month = {Dec},
	pages = {18246-+},
	type = {Article},
	abstract = {A broadly applicable group-4-based precatalyst for the hydroamination of primary and secondary amines was developed. Screening experiments involving a series of amide and urea proligands led to the discovery of a tethered bis(ureate) zirconium complex with unprecedented reactivity in the intermolecular hydroamination of alkynes and the intramolecular hydroamination of alkenes. This catalyst system is effective with primary and secondary amines, 1,2-disubstituted alkenes, and heteroatom-containing functional groups, including ethers, silanes, amines, and heteroaromatics. The gem-disubstituent effect is not required for cyclization. The catalyst is generally regioselective for the anti-Markovnikov product of intermolecular alkyne hydroamination, and chemoselective for hydroamination over alpha-alkylation when forming 6- and 7-membered rings from aminoalkenes.},
	keywords = {ALKYNES, AMIDATE COMPLEXES, AMINES, AMINOALKENES, BOND FORMATION, INTRAMOLECULAR HYDROAMINATION, METAL-CATALYSTS, TITANIUM, UNACTIVATED ALKENES, ZIRCONIUM},
	isbn = {0002-7863},
	url = {<Go to ISI>://000273615800028},
	author = {Leitch, D. C. and Payne, P. R. and Dunbar, C. R. and Schafer, L. L.}
}
@article {1601,
	title = {A pentagonal pyramidal zirconium imido complex for catalytic hydroamination of unactivated alkenes},
	journal = {Organometallics},
	volume = {25},
	number = {17},
	year = {2006},
	note = {ISI Document Delivery No.: 070PZTimes Cited: 66Cited Reference Count: 40Thomson, Robert K. Bexrud, Jason A. Schafer, Laurel L.},
	month = {Aug},
	pages = {4069-4071},
	type = {Article},
	abstract = {The first, isolable group 4 imido complexes capable of promoting intramolecular olefin hydroamination for the preparation of N-containing heterocycles are presented. The structurally characterized 6-coordinate bis(amidate)-supported zirconium imido complex is a rare example of distorted-pentagonal-pyramidal geometry.},
	keywords = {ALKYNE HYDROAMINATION, allenes, AMIDATE COMPLEXES, BIS(AMIDATE) TITANIUM PRECATALYST, C-H ACTIVATION, HYDROAMINATION, INTERMOLECULAR HYDROAMINATION, INTRAMOLECULAR, REACTIVITY, TEMPERATURE, TI(NME2)(4)},
	isbn = {0276-7333},
	url = {<Go to ISI>://000239536800007},
	author = {Thomson, R. K. and Bexrud, J. A. and Schafer, L. L.}
}
