Výsledky vyhledávání - "Charles P. Casey"

Akademický článek

Trapping evidence for the thermal cyclization of di-(o-acetylphenyl)acetylene to 3,3'-dimethyl-1,1'-biisobenzofuran

Autor: Charles P. Casey, Neil A. Strotman, Ilia A. Guzei

Publikováno v: Beilstein Journal of Organic Chemistry, Vol 1, Iss 1, p 18 (2005)

The reaction of di-(o-acetylphenyl)acetylene (1) with excess dimethyl acetylenedicarboxylate (DMAD) produced bis-DMAD adducts meso-3 and rac-3. This transformation is suggested to involve thermal rearrangement of 1 to the intermediate 3,3'-dimethyl-1

Externí odkaz: https://doaj.org/article/d718b7ed397f42c497fbbc1a8acbd48b

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Stereochemistry and Mechanism of the Ring-Opening Reaction of Cyclopropylenones with LiCu(Me)2

Autor: Alan J. Shusterman, Mark C. Cesa, Charles P. Casey

Publikováno v: Organometallics. 31:7849-7854

The chemical shifts of the diastereotopic hydrogens of the ethyl group of the cyclopropane ring-opening product of conjugate addition of LiCu(CH3)2 to cyclopropyl enone 1 were computed. Comparison of computed and observed 1H NMR chemical shifts of th

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::6e2788f450173c98148ee3ae967be416
https://doi.org/10.1021/om300520r

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Trimethylsilyl-Substituted Hydroxycyclopentadienyl Ruthenium Hydrides as Benchmarks To Probe Ligand and Metal Effects on the Reactivity of Shvo Type Complexes

Autor: Charles P. Casey, Hairong Guan

Publikováno v: Organometallics. 31:2631-2638

The bis(trimethylsilyl)-substituted hydroxycyclopentadienyl ruthenium hydride [2,5-(SiMe(3))(2)-3,4-(CH(2)OCH(2))(η(5)-C(4)COH)]Ru(CO)(2)H (10) is an efficient catalyst for hydrogenation of aldehydes and ketones. Because 10 transfers hydrogen rapidl

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::136ade24bcc85e189c5ef9e70413b87e
https://doi.org/10.1021/om2007453

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Formation of β-Ruthenium-Substituted Enones from Propargyl Alcohols

Autor: Ilia A. Guzei, Xiangdong Jiao, Charles P. Casey

Publikováno v: Organometallics. 29:4829-4836

The reaction of the dienone ruthenium dicarbonyl dimer {[2,5-Ph-3,4-Tol(η5-C4CO)]Ru(CO)2}2 (7) with propargyl alcohol at room temperature gave a high yield of β-ruthenium-enal (E)-[2,5-Ph-3,4-Tol(η5-C4COH)]Ru(CO)2(CH═CHCHO) (8E), which was chara

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::4700569707de97170a6e3c16d8724e20
https://doi.org/10.1021/om100012j

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A Boron-Substituted Analogue of the Shvo Hydrogenation Catalyst: Catalytic Hydroboration of Aldehydes, Imines, and Ketones

Autor: Charles P. Casey, Hannah N. Londino, Liza Koren-Selfridge, Bryan J. Simmons, Timothy Clark, Jessica K. Vellucci

Publikováno v: Organometallics. 28:2085-2090

The boron-substituted hydroxycycylopentadienyl ruthenium hydride [2,5-Ph2-3,4-Tol2(η5-C4COBpin)Ru(CO)2H] (Bpin = 4,4,5,5-tetramethyl-1,3,2-dioxaborolane) 5 was synthesized by the addition of pinacolborane to ruthenium dimer [2,5-Ph2-3,4-Tol2(η5-C4C

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::6f803ff83ec2ad4c66b5e231697a0c42
https://doi.org/10.1021/om801228m

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Quantitative Determination of the Regioselectivity of Nucleophilic Addition to η3-Propargyl Rhenium Complexes and Direct Observation of an Equilibrium between η3-Propargyl Rhenium Complexes and Rhenacyclobutenes

Autor: John R. Reinert-Nash, Charles P. Casey, Joseph S. M. Samec, Timothy M. Boller

Publikováno v: Organometallics. 28:123-131

PMe(3) adds selectively to the central carbon of the η(3)- propargyl complex [C(5)Me(5)(CO)(2)Re(η(3)-CH(2)C≡CCMe(3))][BF(4)] (1-t-Bu) to form the metallacyclobutene [C(5)Me(5)(CO)(2)Re(CH(2)C(PMe(3))=CCMe(3))][BF(4)] (7). The rate of rearrangeme

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::d61edb18bc929c509295ad7a6f84063a
https://doi.org/10.1021/om800739j

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PPh3-Substituted [2,5-Ph2-3,4-Tol2(η5-C4COH)]Ru(CO)(PPh3)H Exhibits Slower Stoichiometric Reduction, Faster Catalytic Hydrogenation, and Higher Chemoselectivity for Hydrogenation of Aldehydes over Ketones Than the Dicarbonyl Shvo Catalyst

Autor: Jeffrey B. Johnson, Sharon E. Beetner, Neil A. Strotman, David C. Priebe, Charles P. Casey, Ilia A. Guzei

Publikováno v: Organometallics. 25:1236-1244

The PPh3-substituted hydroxycyclopentadienyl ruthenium hydride [2,5-Ph2-3,4-Tol2(η5-C4COH)]Ru(CO)(PPh3)H (1) stoichiometrically reduces aldehydes and ketones in the presence of a pyridine trap to produce alcohols and the ruthenium pyridine complex 5

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::942b715f924cf0fefc176c9d90f0ed2b
https://doi.org/10.1021/om050939z

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The PPh3-Substituted Hydroxycyclopentadienyl Ruthenium Hydride [2,5-Ph2-3,4-Tol2(η5-C4COH)]Ru(CO)(PPh3)H Is a More Efficient Catalyst for Hydrogenation of Aldehydes

Autor: Neil A. Strotman, Thomas E. Vos, Jeffrey B. Johnson, Babak Khodavandi, Sharon E. Beetner, David C. Priebe, Ilia A. Guzei, Charles P. Casey

Publikováno v: Organometallics. 25:1230-1235

The phosphine-substituted hydroxycyclopentadienyl ruthenium hydride [2,5-Ph2-3,4-Tol2(η5-C4COH)]Ru(CO)(PPh3)H (8) displayed behavior significantly different from that of the dicarbonyl analogue, including the failure to form an unreactive dirutheniu

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::5d7dc7f6be2d037de6f6d83ae931ef92
https://doi.org/10.1021/om0509387

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Kinetic isotope effect evidence for the concerted transfer of hydride and proton from hydroxycyclopentadienyl ruthenium hydride in solvents of different polarities and hydrogen bonding ability

Autor: Charles P. Casey, Jeffrey B. Johnson

Publikováno v: Canadian Journal of Chemistry. 83:1339-1346

The tolyl analogue of Shvo's hydroxycyclopentadienyl ruthenium hydride (4) efficiently transfers a hydride and proton to benzaldehyde or acetophenone to produce an alcohol. This reduction can be performed in toluene, methylene chloride, and THF. Redu

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::a0ed49a4f77af6bffdf597e82f122e4b
https://doi.org/10.1139/v05-140

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Hydrogen Elimination from a Hydroxycyclopentadienyl Ruthenium(II) Hydride: Study of Hydrogen Activation in a Ligand−Metal Bifunctional Hydrogenation Catalyst

Autor: Qiang Cui, Jeffrey B. Johnson, Charles P. Casey, Steven W. Singer

Publikováno v: Journal of the American Chemical Society. 127:3100-3109

At high temperatures in toluene, [2,5-Ph(2)-3,4-Tol(2)(eta(5)-C(4)COH)]Ru(CO)(2)H (3) undergoes hydrogen elimination in the presence of PPh(3) to produce the ruthenium phosphine complex [2,5-Ph(2)-3,4-Tol(2)-(eta(4)-C(4)CO)]Ru(PPh(3))(CO)(2) (6). In

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::2d1c867d284a9042bedf6042857cb359
https://doi.org/10.1021/ja043460r

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