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Full-Text Articles in Physical Sciences and Mathematics
Bicatalytic Allylation–Cross-Metathesis Reactions As Γ-Carbonyl Cation Equivalents, Jake R. Henkie, Sugadar Dhaliwal, James R. Green
Bicatalytic Allylation–Cross-Metathesis Reactions As Γ-Carbonyl Cation Equivalents, Jake R. Henkie, Sugadar Dhaliwal, James R. Green
Chemistry and Biochemistry Publications
The products corresponding to the reactions of arenes and γ-carbonyl cations may be obtained by a one-pot, bicatalytic process involving InCl3-catalyzed arene allylation and cross metathesis with electron-deficient alkenes. The process is successful with electronically neutral and electron-rich arenes, and modestly Lewis basic donor groups are tolerated with an increase in InCl3 loading from 10 mol% to 15 mol%, and in one case, 20 mol%.
A Molecular Dynamics (Md) And Quantum Mechanics/Molecular Mechanics (Qm/Mm) Study On Ornithine Cyclodeaminase (Ocd): A Tale Of Two Iminiums, Bogdan F. Ion, Eric Andre Bushnell, Phil De Luna, James Gauld
A Molecular Dynamics (Md) And Quantum Mechanics/Molecular Mechanics (Qm/Mm) Study On Ornithine Cyclodeaminase (Ocd): A Tale Of Two Iminiums, Bogdan F. Ion, Eric Andre Bushnell, Phil De Luna, James Gauld
Chemistry and Biochemistry Publications
Ornithine cyclodeaminase (OCD) is an NAD+-dependent deaminase that is found in bacterial species such as Pseudomonas putida. Importantly, it catalyzes the direct conversion of the amino acid L-ornithine to L-proline. Using molecular dynamics (MD) and a hybrid quantum mechanics/molecular mechanics (QM/MM) method in the ONIOM formalism, the catalytic mechanism of OCD has been examined. The rate limiting step is calculated to be the initial step in the overall mechanism: hydride transfer from the L-ornithine’s Cα–H group to the NAD+cofactor with concomitant formation of a Cα=NH2+ Schiff base with a barrier …
Alkynedicobalt Complexes In Γ-Carbonyl Cations And Cycloheptynedicobalt Complexes, James R. Green
Alkynedicobalt Complexes In Γ-Carbonyl Cations And Cycloheptynedicobalt Complexes, James R. Green
Chemistry and Biochemistry Publications
This Account describes our work on highly electrophilic γ-carbonyl cations featuring propargyldicobalt cations, cycloheptynedicobalt complexes, and the interconnection between the two systems.
1 Introduction
2 γ-Carbonyl Cations via Iron Allyl Cations
3 γ-Carbonyl Cations via Propargyldicobalt Cations
3.1 Synthesis of Velloziolide
3.2 Synthesis of Microstegiol
4 Synthesis of Cycloheptynedicobalt Complexes
4.1 Synthesis via γ-Carbonyl Cations
4.2 Cycloheptynedicobalt Complexes via [4+3] Cycloaddition Reactions
4.3 Cycloheptynedicobalt Complexes via Ring-Closing Metathesis
4.4 Cycloaddition Reactions on Cycloheptynedicobalt Complexes
4.5 Cycloheptynedicobalt Complexes via Intramolecular Nicholas Reactions
5 Dehydrotropylium Ion Co2(CO)6 Complex
6 Final Comments
Low Levels Of Extra-Pair Paternity In A Neotropical Duetting Songbird, The Rufous-And-White Wren (Thryothorus Rufalbus), Sarah B. Douglas, Daniel D. Heath, Daniel J. Mennill
Low Levels Of Extra-Pair Paternity In A Neotropical Duetting Songbird, The Rufous-And-White Wren (Thryothorus Rufalbus), Sarah B. Douglas, Daniel D. Heath, Daniel J. Mennill
Great Lakes Institute for Environmental Research Publications
Molecular analyses have confirmed that the majority of socially monogamous birds follow a genetically promiscuous reproductive strategy. Most such studies, however, have addressed species of the North Temperate Zone; tropical species are grossly underrepresented, although most of Earth's biodiversity is concentrated in the tropics. In this study, we describe the genetic mating strategy of the Rufous-and-white Wren (Thryothorus rufalbus), a socially monogamous duetting neotropical songbird. Over 8 years of studying a marked population in Costa Rica, we recorded genetic data from 51 broods. Microsatellite analysis of four variable loci revealed that the Rufous-and-white Wren follows a mixed reproductive strategy, where …