Search Results - "TONKS, IAN"

Ti-Catalyzed and -Mediated Oxidative Amination Reactions by Tonks, Ian A

“…Conspectus Titanium is an attractive metal for catalytic reaction development: it is earth-abundant, inexpensive, and generally nontoxic. Howeverlike most…”
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Trimethylsilyl‐Protected Alkynes as Selective Cross‐Coupling Partners in Titanium‐Catalyzed [2+2+1] Pyrrole Synthesis by Chiu, Hsin‐Chun, Tonks, Ian A.

“…Trimethylsilyl (TMS)‐protected alkynes served as selective alkyne cross‐coupling partners in titanium‐catalyzed [2+2+1] pyrrole synthesis. Reactions of…”
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Catalytic formal [2+2+1] synthesis of pyrroles from alkynes and diazenes via Ti(II)/Ti(IV) redox catalysis by Gilbert, Zachary W, Hue, Ryan J, Tonks, Ian A

“…Pyrroles are structurally important heterocycles. However, the synthesis of polysubstituted pyrroles is often challenging. Here, we report a multicomponent,…”
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Tunable and recyclable polyesters from CO2 and butadiene by Rapagnani, Rachel M., Dunscomb, Rachel J., Fresh, Alexandra A., Tonks, Ian A.

“…Carbon dioxide is inexpensive and abundant, and its prevalence as waste makes it attractive as a sustainable chemical feedstock. Although there are examples of…”
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Mechanism of Ti-Catalyzed Oxidative Nitrene Transfer in [2 + 2 + 1] Pyrrole Synthesis from Alkynes and Azobenzene by Davis-Gilbert, Zachary W, Wen, Xuelan, Goodpaster, Jason D, Tonks, Ian A

“…A combined computational and experimental study on the mechanism of Ti-catalyzed formal [2 + 2 + 1] pyrrole synthesis from alkynes and aryl diazenes is…”
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Bonding and Reactivity of d 0 Transition Metal Imido Complexes Encoded in Their 15 N NMR Signatures by Kakiuchi, Yuya, Karmakar, Partha Sarathi, Roudin, Jérémy, Tonks, Ian A, Copéret, Christophe

“…Terminal imido complexes containing metal-nitrogen multiple bonds have been widely used in organometallic chemistry and homogeneous catalysis. The role of…”
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Ti-Catalyzed Multicomponent Synthesis of Pyrroles Using Allene Coupling Partners by Kaper, Tobias, Frye, Connor W., Tonks, Ian A.

“…There is significant interest in developing chemo- and regioselective intermolecular multicomponent syntheses of N-heterocycles, which are common motifs in…”
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Dative Directing Group Effects in Ti-Catalyzed [2+2+1] Pyrrole Synthesis: Chemo- and Regioselective Alkyne Heterocoupling by Chiu, Hsin-Chun, See, Xin Yi, Tonks, Ian A

“…Transient dative substrate–Ti interactions have been found to play a key role in controlling the regioselectivity of alkyne insertion and [2+2] cycloaddition…”
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Multicomponent Pyrazole Synthesis from Alkynes, Nitriles, and Titanium Imido Complexes via Oxidatively Induced N–N Bond Coupling by Pearce, Adam J, Harkins, Robin P, Reiner, Benjamin R, Wotal, Alexander C, Dunscomb, Rachel J, Tonks, Ian A

“…Pyrazoles are an important class of heterocycles found in a wide range of bioactive compounds and pharmaceuticals. Pyrazole synthesis often requires hydrazine…”
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Reactivity of terminal imido complexes of group 4–6 metals: Stoichiometric and catalytic reactions involving cycloaddition with unsaturated organic molecules by Kawakita, Kento, Parker, Bernard F., Kakiuchi, Yuya, Tsurugi, Hayato, Mashima, Kazushi, Arnold, John, Tonks, Ian A.

“…•Summary of the synthesis, properties, and reactions of early metal imido complexes.•Cycloaddition reactions of model complexes and examples from recent…”
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Modern applications of low-valent early transition metals in synthesis and catalysis by Beaumier, Evan P., Pearce, Adam J., See, Xin Yi, Tonks, Ian A.

“…Low-valent early transition metals are often intrinsically highly reactive as a result of their strong propensity toward oxidation to more stable high-valent…”
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Evaluation of Tungsten Catalysis among Early Transition Metals for N‑Aryl-2,3,4,5-tetraarylpyrrole Synthesis: Modular Access to N‑Doped π‑Conjugated Material Precursors by Tsurugi, Hayato, Akiyama, Takuya, Frye, Connor W., Kakiuchi, Yuya, Mashima, Kazushi, Tonks, Ian A.

“…Low-valent tungsten species generated from WCl6 and N,N′-bis­(trimethylsilyl)-2,5-dimethyldihydropyrazine (Si-Me2-DHP) promotes the catalytic formation of…”
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Ti-Catalyzed Multicomponent Oxidative Carboamination of Alkynes with Alkenes and Diazenes by Davis-Gilbert, Zachary W, Yao, Letitia J, Tonks, Ian A

“…The inter- or intramolecular oxidative carboamination of alkynes catalyzed by [py2TiCl2NPh]2 is reported. These multicomponent reactions couple alkenes,…”
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Organometallic mechanisms: Measuring up with the early metals by Tonks, Ian A

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Synthesis of Ti Complexes Supported by an ortho-Terphenoxide Ligand and Their Applications in Alkyne Hydroamination Catalysis by Butler, Steven K., Ashbrook, Ethan P., Tonks, Ian A.

“…The synthesis of a series of Ti complexes of an aryl-linked bis-phenoxide ligand, 3,3″-di-tert-butyl-5,5″-dimethyl-[1,1′:2′,1″-terphenyl]-2,2″-bis­(olate),…”
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Group 4 Diarylmetallocenes as Bespoke Aryne Precursors for Titanium-Catalyzed [2 + 2 + 2] Cycloaddition of Arynes and Alkynes by Reiner, Benjamin R, Tonks, Ian A

“…Despite the ubiquity of reports describing titanium (Ti)-catalyzed [2 + 2 + 2] cyclotrimerization of alkynes, the incorporation of arynes into this potent…”
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Synthesis of pentasubstituted 2-aryl pyrroles from boryl and stannyl alkynes via one-pot sequential Ti-catalyzed [2 + 2 + 1] pyrrole synthesis/cross coupling reactions by Cheng, Yukun, Klein, Channing K, Tonks, Ian A

“…Multisubstituted pyrroles are commonly found in many bioactive small molecule scaffolds, yet the synthesis of highly-substituted pyrrole cores remains…”
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Bonding and Reactivity of d0 Transition Metal Imido Complexes Encoded in Their 15N NMR Signatures by Kakiuchi, Yuya, Karmakar, Partha Sarathi, Roudin, Jérémy, Tonks, Ian A., Copéret, Christophe

“…Terminal imido complexes containing metal–nitrogen multiple bonds have been widely used in organometallic chemistry and homogeneous catalysis. The role of…”
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Smchd1 regulates long-range chromatin interactions on the inactive X chromosome and at Hox clusters by Jansz, Natasha, Keniry, Andrew, Trussart, Marie, Bildsoe, Heidi, Beck, Tamara, Tonks, Ian D., Mould, Arne W., Hickey, Peter, Breslin, Kelsey, Iminitoff, Megan, Ritchie, Matthew E., McGlinn, Edwina, Kay, Graham F., Murphy, James M., Blewitt, Marnie E.

“…The regulation of higher-order chromatin structure is complex and dynamic, and a full understanding of the suite of mechanisms governing this architecture is…”
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Diverse Reactivity of Diazatitanacyclohexenes: Coupling Reactions of 2H‑Azirines Mediated by Titanium(II) by Desnoyer, Addison N, See, Xin Yi, Tonks, Ian A

“…2H-Azirines are versatile coupling partners for the synthesis of N-heterocycles. Herein, we present our studies on the reactivity of Cp2Ti­(BTMSA) (1; BTMSA =…”
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