@article {31533,
	title = {Ti-Catalyzed Hydroamination for the Synthesis of Amine-Containing π-Conjugated Materials},
	journal = {Chemistry {\textendash} A European Journal},
	volume = {24},
	year = {2018},
	pages = {5562-5568},
	abstract = {<p>Abstract A series of conjugated enamines were prepared by Ti catalyzed anti-Markovnikov hydroamination. The synthetic route is efficient with yields of up to 94\&thinsp;\% and the 100\&thinsp;\% atom efficiency of the reaction means that these products are easily isolated and purified. Due to the extended conjugated system, the enamine tautomers were observed exclusively in both solid and solution phases, as determined by X-ray crystallography and NMR spectroscopy. These new conjugated molecules, with N incorporated into the backbone, show interesting photophysical properties including photo-luminescent quantum yields of up to 0.26. Notably, through the incorporation of B to give a donor\&ndash;acceptor π-conjugated system, a redshift of approximately 100 nm is observed for the emission maximum along with the anticipated solvatochromic shifts.</p>},
	keywords = {conjugated oligomers, enamine, HYDROAMINATION, TITANIUM, π-conjugated materials},
	doi = {10.1002/chem.201704500},
	url = {https://onlinelibrary.wiley.com/doi/abs/10.1002/chem.201704500},
	author = {Hao, Han and Thompson, Kyle A. and Hudson, Zachary M. 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.}
}
@article {2494,
	title = {N,O-Chelates of Group 4 Metals: Contrasting the Use of Amidates and Ureates in the Synthesis of Metal Dichlorides},
	journal = {European Journal of Inorganic Chemistry},
	number = {18},
	year = {2009},
	note = {ISI Document Delivery No.: 467LNTimes Cited: 5Cited Reference Count: 69Leitch, David C. Beard, J. David Thomson, Robert K. Wright, Vincent A. Patrick, Brian O. Schafer, Laurel L.},
	month = {Jun},
	pages = {2691-2701},
	type = {Article},
	abstract = {A series of dichloride complexes of titanium and zirconium with amidate and ureate ancillary ligands have been prepared, Three examples of bis(amidate)dichlorotitanium and zirconium complexes were effectively synthesized through salt metathesis with metal tetrachloride as starting materials. Optimum results were achieved using sodium amidate salts formed from sodium bis(trimethylsilyl)amide and neutral amide proligands, while other methods were ineffective. Use of electron-donating ureate ligands in lieu of amidates enables preparation through alternate routes. Protonolysis of Ti(NMe2)(2)Cl-2 and Zr(NMe2)(2)Cl-2(dme) with urea proligands leads to dichlorobis(ureate) complexes in good yield. Using a tethered bis(ureate) ligand eliminates the fluxional behaviour and coordination isomerism observed for both bis(amidate) and bis(ureate) zirconium complexes. ((C) Wiley-VCH Verlag GmbH \& Co. KGaA, 69451 Weinheim, Germany, 2009)},
	keywords = {amidate, BIS(AMIDATE) TITANIUM PRECATALYST, CATALYTIC, Chelates, COORDINATION CHEMISTRY, EARLY, GUANIDINATE LIGANDS, HYDROAMINATION, INTERMOLECULAR HYDROAMINATION, N, O ligands, OLEFIN POLYMERIZATION, SOLUTION DYNAMICS, STRUCTURAL-CHARACTERIZATION, TITANIUM, TRANSITION-METALS, Ureate, ZIEGLER-NATTA POLYMERIZATION, ZIRCONIUM},
	isbn = {1434-1948},
	url = {<Go to ISI>://000267740500015},
	author = {Leitch, D. C. and Beard, J. D. and Thomson, R. K. and Wright, V. A. and Patrick, B. O. and Schafer, L. L.}
}
@article {1060,
	title = {Intramolecular hydroamination of unactived olefins with Ti(NMe2)(4) as a precatalyst},
	journal = {Organic Letters},
	volume = {7},
	number = {10},
	year = {2005},
	note = {ISI Document Delivery No.: 924NCTimes Cited: 104Cited Reference Count: 59},
	month = {May},
	pages = {1959-1962},
	type = {Article},
	abstract = {[GRAPHICS] Commercially available Ti(NMe2)(4) has been used effectively as a precatalyst in a facile protocol for the intramolecular hydroamination of aminoalkenes to yield pyrrolidine and piperidine heterocyclic products with isolated yields up to 92\%. Germinally substituted substrates display the highest reactivity. This precatalyst is also effective for the hydroamination of activated internal alkenes, providing access to more complex heterocyclic target molecules.},
	keywords = {ALKENE HYDROAMINATION, ALKYNE, AMIDO COMPLEXES, ANTI-MARKOVNIKOV, CATALYZED INTERMOLECULAR HYDROAMINATION, GROUP-3 METALS, HYDROAMINATION, IMIDO COMPLEXES, REACTIVITY, TITANIUM, ZIRCONIUM},
	isbn = {1523-7060},
	url = {<Go to ISI>://000228984500019},
	author = {Bexrud, J. A. and Beard, J. D. and Leitch, D. C. and Schafer, L. L.}
}
@article {1286,
	title = {Synthesis, characterization, and reactivity of the first hafnium alkyl complex stabilized by amidate ligands},
	journal = {Canadian Journal of Chemistry-Revue Canadienne De Chimie},
	volume = {83},
	number = {6-7},
	year = {2005},
	note = {ISI Document Delivery No.: 963UVTimes Cited: 7Cited Reference Count: 20},
	month = {Jun},
	pages = {1037-1042},
	type = {Article},
	abstract = {A photo and thermally stable bis(amidate)-dibenzyl complex of Hf ([(DMP)(NO)(Ph)](2)Hf(CH2Ph)(2)(THF) (2a) was formed as a monosolvated THF adduct in near quantitative yield from Hf(CH2Ph)(4) and N-2,6-dimethylphenyl(phenyl)amide (1). Isomerization between the THF-bound product and the THF-free product can be observed visually by the conversion from a red-orange product at low temperatures to a pale yellow product at high temperatures. Solid-state crystallographic characterization of the orange product confirmed its constitution as a monosolvated species. Kinetic parameters for the exchange of the THF moiety were determined from variable-temperature NMR experiments. The product of the hydrolysis of the Hf dibenzyl species by water was characterized by X-ray crystallography, and was found to be a rare tetrametallic Hf oxo cluster species (3).},
	keywords = {amidate, CHEMISTRY, COORDINATION CHEMISTRY, CRYSTAL, exchange processes, hafnium, HYDROAMINATION, MOLECULAR-STRUCTURE, organometallic, protonolysis, TITANIUM},
	isbn = {0008-4042},
	url = {<Go to ISI>://000231832500064},
	author = {Thomson, R. K. and Patrick, B. O. and Schafer, L. L.}
}
@article {379,
	title = {Phosphorus phenyl-group activation by reduced zirconium and niobium complexes stabilized by the [P2N2] macrocycle},
	journal = {Journal of the American Chemical Society},
	volume = {124},
	number = {4},
	year = {2002},
	note = {ISI Document Delivery No.: 514THTimes Cited: 21Cited Reference Count: 23},
	month = {Jan},
	pages = {516-517},
	type = {Article},
	keywords = {ARENE COMPLEX, CHEMISTRY, CRYSTAL, DERIVATIVES, DINITROGEN, LIGAND, REACTIVITY, TITANIUM},
	isbn = {0002-7863},
	url = {<Go to ISI>://000173456800002},
	author = {Fryzuk,Michael D. and Kozak, C. M. and Mehrkhodavandi, Parisa and Morello, L. and Patrick, B. O. and Rettig, S. J.}
}
@article {5073,
	title = {Formation and reactivity of the zirconium ethylene complexes [eta(5)-C5H3-1,3-(SiMe2CH2PR2)(2)]Zr(eta(2)-CH2=CH2)(X) (R = Me, Pr (i); X = Br, C5H5)},
	journal = {Canadian Journal of Chemistry-Revue Canadienne De Chimie},
	volume = {79},
	number = {5-6},
	year = {2001},
	note = {ISI Document Delivery No.: 456EVTimes Cited: 5Cited Reference Count: 36},
	month = {May},
	pages = {536-545},
	type = {Article},
	abstract = {{The formation and reactivity of the zirconium ethylene complexes (R)[P2Cp]Zr(eta (2)-CH2=CH2)(X) (2a: R = Pr-i},
	keywords = {ALKENE, ALKYNE, CARBONYL, CHEMISTRY, CRYSTAL-STRUCTURE, cyclopentadienyl phosphine, DERIVATIVES, LIGANDS, metallocyclopropane, metals, NORBORNENE, SIME3, TITANIUM, ZIRCONIUM},
	isbn = {0008-4042},
	url = {<Go to ISI>://000170070900011},
	author = {Fryzuk,Michael D. and Duval, P. B. and Rettig, S. J.}
}
@article {4239,
	title = {The first nitrosyl complexes of niobium and tantalum},
	journal = {Journal of the American Chemical Society},
	volume = {120},
	number = {11},
	year = {1998},
	note = {ISI Document Delivery No.: ZD933Times Cited: 11Cited Reference Count: 37},
	month = {Mar},
	pages = {2688-2689},
	type = {Article},
	keywords = {ATMOSPHERIC-PRESSURE, BIS(PENTAMETHYLCYCLOPENTADIENYL)VANADIUM, CARBONYL DERIVATIVES, CHEMISTRY, CRYSTAL-STRUCTURE, ELECTRON-TRANSFER PROCESSES, LOW-VALENT, MOLECULAR-STRUCTURE, NITRIC-OXIDE, TITANIUM},
	isbn = {0002-7863},
	url = {<Go to ISI>://000072740300038},
	author = {Daff, P. J. and Legzdins,Peter and Rettig, S. J.}
}
@article {7231,
	title = {PHOSPHINE COMPLEXES OF ZIRCONIUM AND HAFNIUM - SYNTHESIS, STRUCTURE, AND FLUXIONAL BEHAVIOR OF THE TRIMETHYL DERIVATIVES MME3[N(SIME2CH2PR2)2] (R = ME, ISO-PR, TERT-BU) - EVIDENCE FOR A BICAPPED-TETRAHEDRAL GEOMETRY},
	journal = {Organometallics},
	volume = {11},
	number = {1},
	year = {1992},
	note = {ISI Document Delivery No.: GZ040Times Cited: 17Cited Reference Count: 31},
	month = {Jan},
	pages = {469-472},
	type = {Note},
	abstract = {The addition of 3 equiv of methyl Grignard (MeMgCl) to the amidodiphosphine derivatives MCl3[N-(SiMe2CH2PR2)2] (M = Zr, Hf; R = Me, Pr(i), Bu(t)) generates the corresponding trimethyl complexes MMe3[N-(SiMe2CH2PR2)2]. The solution structures and fluxional behavior of these molecules along with the X-ray structure of HfMe3[N(SiMe2CH2PMe2)2] are presented.},
	keywords = {ALKYL, CARBON BOND, DINITROGEN, ETHYLENE POLYMERIZATION, GROUP-4, HYDRIDE DERIVATIVES, INSERTION, RAY CRYSTAL-STRUCTURE, REDUCTION, TITANIUM},
	isbn = {0276-7333},
	url = {<Go to ISI>://A1992GZ04000078},
	author = {Fryzuk,Michael D. and Carter, A. and Rettig, S. J.}
}
