@article {https://doi.org/10.1002/cctc.201900416,
	title = {Planar-Chiral [2.2]Paracyclophane-Based Pyridonates as Ligands for Tantalum-Catalyzed Hydroaminoalkylation},
	journal = {ChemCatChem},
	volume = {11},
	number = {21},
	year = {2019},
	pages = {5264-5268},
	abstract = {Abstract By using planar chiral [2.2]paracyclophane-containing N,O-chelating ligands for tantalum-catalyzed hydroaminoalkylation, one of the most versatile catalytic systems for this reaction to date was obtained. Convenient Csp3-Csp3 bond formation of amines with terminal and internal alkenes was enabled by the same in situ synthesized catalytic system of [2.2]paracyclophane-based pyridonates and Ta(CH2TMS)3Cl2 that shows also very promising results for N-containing heterocycles.},
	keywords = {ALKENES, AMINES, Cyclophanes, Green chemistry, tantalum},
	doi = {https://doi.org/10.1002/cctc.201900416},
	url = {https://chemistry-europe.onlinelibrary.wiley.com/doi/abs/10.1002/cctc.201900416},
	author = {Braun, Carolin and Nieger, Martin and Br{\"a}se, Stefan and Schafer, Laurel L.}
}
@article {31534,
	title = {Catalytic and Atom-Economic C -C Bond Formation: Alkyl Tantalum Ureates for Hydroaminoalkylation},
	journal = {Angewandte Chemie International Edition},
	volume = {57},
	year = {2018},
	pages = {3469-3472},
	abstract = {<p>Abstract Atom-economic and regioselective C \&minus;C bond formation has been achieved by rapid C\&minus;H alkylation of unprotected secondary arylamines with unactivated alkenes. The combination of Ta(CH2SiMe3)3Cl2, and a ureate N,O-chelating-ligand salt gives catalytic systems prepared in situ that can realize high yields of β-alkylated aniline derivatives from either terminal or internal alkene substrates. These new catalyst systems realize C\&minus;H alkylation in as little as one hour and for the first time a 1:1 stoichiometry of alkene and amine substrates results in high yielding syntheses of isolated amine products by simple filtration and concentration.</p>},
	keywords = {AMINES, C-H activation, HYDROAMINOALKYLATION, tantalum alkyls, ureates},
	doi = {10.1002/anie.201712668},
	url = {https://onlinelibrary.wiley.com/doi/abs/10.1002/anie.201712668},
	author = {DiPucchio, Rebecca C. and Ro{\c s}ca, Sorin-Claudiu and Schafer, Laurel 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 {2491,
	title = {The Direct Synthesis of Unsymmetrical Vicinal Diamines from Terminal Alkynes: A Tandem Sequential Approach for the Synthesis of Imidazolidinones},
	journal = {Synthesis-Stuttgart},
	number = {1},
	year = {2009},
	note = {ISI Document Delivery No.: 395LSTimes Cited: 6Cited Reference Count: 84Lee, Alison V. Sajitz, Melanie Schafer, Laurel L.Sp. Iss. SI},
	month = {Jan},
	pages = {97-104},
	type = {Article},
	abstract = {The combination of titanium-catalyzed anti-Markovnikov hydroamination of terminal alkynes with the Strecker reaction is used in the synthesis of unsymmetrical vicinal diamines via the one-pot synthesis of alpha-cyanoamines. This methodology is Further applied to the efficient synthesis of imidazolidinones. An easy-to-use bis(amidate)titanium precatalyst permits efficient approaches to heterocyclic chemistry from terminal alkynes.},
	keywords = {AMINES, ANTI-MARKOVNIKOV, ASYMMETRIC-SYNTHESIS, CATALYZED INTERMOLECULAR HYDROAMINATION, HETEROCYCLES, HYDROAMINATION, IMIDO COMPLEXES, INTRAMOLECULAR HYDROAMINATION, LIGANDS, SCOPE, tandem reactions, TITANIUM, TITANIUM PRECATALYST, VINYLARENES},
	isbn = {0039-7881},
	url = {<Go to ISI>://000262526200012},
	author = {Lee, A. V. and Sajitz, M. and Schafer, L. L.}
}
