Výsledky vyhledávání - "Tulaza Vaidya"

Understanding the Insertion Pathways and Chain Walking Mechanisms of α-Diimine Nickel Catalysts for α-Olefin Polymerization: A 13C NMR Spectroscopic Investigation

Autor: Ivan Keresztes, Jessica R. Lamb, Olafs Daugulis, Geoffrey W. Coates, Kristine Klimovica, Anne M. LaPointe, Tulaza Vaidya, Kyle S. O’Connor

Publikováno v: Macromolecules. 50:7010-7027

Nickel α-diimine catalysts have been previously shown to perform the chain straightening polymerization of α-olefins to produce materials with melting temperatures (Tm) similar to linear low density polyethylene (Tm = 100–113 °C). Branching defe

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::2c3b5016dd2c01faf6419b82d52aafd7
https://doi.org/10.1021/acs.macromol.7b01150

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Controlled Chain Walking for the Synthesis of Thermoplastic Polyolefin Elastomers: Synthesis, Structure, and Properties

Autor: Anne M. LaPointe, Annabelle Watts, Geoffrey W. Coates, Kyle S. O’Connor, Tulaza Vaidya, Marc A. Hillmyer

Publikováno v: Macromolecules. 49:6743-6751

Thermoplastic elastomers are attractive materials because of their ability to be melt-processed, reused, and recycled, unlike chemically cross-linked elastomers such as rubber. We report the synthesis and mechanical properties of polyolefin-based the

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::e1b3a5eb0159577b5b14b9311c87d0c3
https://doi.org/10.1021/acs.macromol.6b01567

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Secondary Alkene Insertion and Precision Chain-Walking: A New Route to Semicrystalline 'Polyethylene' from α-Olefins by Combining Two Rare Catalytic Events

Autor: Olafs Daugulis, Kristine Klimovica, Emil B. Lobkovsky, Tulaza Vaidya, Anne M. LaPointe, Geoffrey W. Coates, Ivan Keresztes

Publikováno v: Journal of the American Chemical Society. 136:7213-7216

While traditional polymerization of linear α-olefins (LAOs) typically provides amorphous, low T(g) polymers, chain-straightening polymerization represents a route to semicrystalline materials. A series of α-diimine nickel catalysts were tested for

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::e0bc61fbc6cddb86429c7ed44f759cec
https://doi.org/10.1021/ja502130w

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Cationic Cyclizations and Rearrangements Promoted by a Heterogeneous Gold Catalyst

Autor: Richard Eisenberg, Alison J. Frontier, Ryan Cheng, Peter N. Carlsen, Tulaza Vaidya

Publikováno v: Organic Letters

A heterogeneous gold catalyst with remarkable activity for promoting the electrophilic reactions of aryl vinyl ketones and aryl dienyl ketones is described. The catalyst is easy to prepare, is robust, and can be recycled. Low loadings are effective f

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::05c3b4e20415835cd2976be622b1d2db
http://europepmc.org/articles/PMC3969096

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Beyond the Divinyl Ketone: Innovations in the Generation and Nazarov Cyclization of Pentadienyl Cation Intermediates

Autor: Alison J. Frontier, William T. Spencer, Tulaza Vaidya

Publikováno v: European Journal of Organic Chemistry. 2013:3621-3633

The requirement for new strategies for synthesizing five-membered carbocycles has driven an expansion in the study of the Nazarov cyclization. This renewed interest in the reaction has led to the discovery of several interesting new methods for gener

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::9fa307c69ef2fd37e7495706eaa767a8
https://doi.org/10.1002/ejoc.201300134

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Divergent Reaction Pathways of a Cationic Intermediate: Rearrangement and Cyclization of 2-Substituted Furyl and Benzofuryl Enones Catalyzed by Iridium(III)

Autor: Gerald F. Manbeck, Richard Eisenberg, Sylvia Chen, Alison J. Frontier, Tulaza Vaidya

Publikováno v: Journal of the American Chemical Society. 133:3300-3303

In contrast to 2-substituted pyrrole enones, furyl and benzofuryl enones do not undergo the Nazarov electrocyclization. Instead, these furyl and benzofuryl enones exhibit unusual rearrangement sequences in the presence of catalytic amounts of [IrBr(C

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::5c81724a151456e45853ee4ef543438a
https://doi.org/10.1021/ja111317q

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Dicationic Palladium(II) Complexes as Active Lewis Acid Catalysts for Polarized Nazarov Cyclization

Autor: Tulaza Vaidya, Alison J. Frontier, Jing Zhang, Richard Eisenberg, William W. Brennessel

Publikováno v: Organometallics. 29:3341-3349

Two new bidentate phosphonamidite ligands − 1,2-bis((3αS)-3,3-diphenyltetrahydro-2-oxa-6α-aza-1-phosphapentaleno)ethane, L1, and 1,2-bis((3αS)-3,3-diphenyltetrahydro-2-oxa-6α-aza-1-phosphapentaleno)benzene, L2 − were prepared from (S)-α,α-d

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::e6a2105e4df2dca1ae9acfef1d5586fd
https://doi.org/10.1021/om100274g

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α-Synuclein Budding Yeast Model: Toxicity Enhanced by Impaired Proteasome and Oxidative Stress

Autor: Brandon E. Johnson, Nijee Sharma, Tulaza Vaidya, Sara Herrera, Ruja Shrestha, Katrina Brandis, Shubhik K. DebBurman

Publikováno v: Journal of Molecular Neuroscience. 28:161-178

Parkinson's disease (PD) is a common neurodegenerative disorder that results from the selective loss of midbrain dopaminergic neurons. Misfolding and aggregation of the protein alpha-synuclein, oxidative damage, and proteasomal impairment are all hyp

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::10d87da2bdb463aa1def759a17c12fcc
https://doi.org/10.1385/jmn:28:2:161

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