1,130 research outputs found
Mechanistic Investigations into the Palladium-Catalyzed Decarboxylative Allylic Alkylation of Ketone Enolates Using the PHOX Ligand Architecture
No full textPalladium-catalyzed asymmetric allylic alkylation has become a large and important field for chemical synthesis. Many methodologies in this field offer mild conditions under which challenging and important molecular features can be reliably synthesized, including chiral all-carbon quaternary stereocenters. As a result, palladium- catalyzed asymmetric allylic alkylation has found significant use in total synthesis, and growing use in industry. While the general process of palladium-catalyzed asymmetric allylic alkylation has been studied for decades, there have been a number of recent modifications and developments, such as asymmetric versions of decarboxylative allylic alkylation procedures that are not yet well understood. The development of future implementations and improvements to palladium-catalyzed asymmetric allylic alkylation and related methodologies is expected to be facilitated by a better understanding of these more recent developments, and thus further mechanistic investigation is warranted.
Reported herein is a set of investigations into the palladium-catalyzed decarboxylative asymmetric allylic alkylation of ketone enolates using the PHOX ligand architecture. By monitoring the reaction via 31P NMR, a series of previously unidentified key intermediates is discovered. Two representatives of these key intermediates are isolated and characterized. The solution behavior of these species under reaction-like conditions is studied along with a few novel and related complexes. The role of these intermediates and their impact on the behavior of the reaction and product formation is discussed. Previously confounding experimentally observed behavior for this methodology is rationalized via the properties elucidated for these discovered intermediates.</p
George E. Haynes, circa 1945
No full textGeorge E. Haynes (1880-1960), Class of 1903, was a sociologist, author, educator. Haynes was the first black graduate of a School of Social Work (1910) and the first black to receive a Ph.D. from Columbia University
Donald Frederick Haynes Family
No full textDonald Frederick Haynes stands with his wife Lilah Mae (Baer) and daughter Dona Louise. Pastor D. F. Haynes sang in a quartet at the 1946 General Conference Session praise service on the morning of June 14. Donald was the son of evangelist and author Carlyle Boynton Haynes.https://scholarsrepository.llu.edu/general-conference-1946-gallery/1011/thumbnail.jp
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The Benefits of Development and Environmental Injustice
No full textProfessor of Law, Earle Mack School of Law, Drexel University. The author wishes to thank Roger Dennis, John Echeverria, Eileen Gauna, Robert Kuehn, and Bradford Mank, as well as participants in the Vermont Law School Environmental Colloquium and the Public Interest Law Center of Philadelphia Conference on Environmental Justice for their helpful comments and suggestions. Excellent research support was provided by Eric Brei, Alex Feldman, Seth Haynes, and Kimberly Magrini
The Benefits of Development and Environmental Injustice
No full textProfessor of Law, Earle Mack School of Law, Drexel University. The author wishes to thank Roger Dennis, John Echeverria, Eileen Gauna, Robert Kuehn, and Bradford Mank, as well as participants in the Vermont Law School Environmental Colloquium and the Public Interest Law Center of Philadelphia Conference on Environmental Justice for their helpful comments and suggestions. Excellent research support was provided by Eric Brei, Alex Feldman, Seth Haynes, and Kimberly Magrini
Roy Haynes: the early years
No full textIn four parts, this thesis covers the early years of the life, development, and career of Roy Haynes beginning with his ancestry and family history in Boston, to the early 1950's in New York, by which time he had become an established fixture on the scene of New York’s new evolution of African American music called bebop. The purpose of this study is to magnify the genesis of one of America’s treasured artists – taking a glimpse into the dawning of his influences and musical exposure, and later highlighting his gift in expressive versatility which carried him throughout his career, displaying the gradual making of an internationally renowned artist.
Part one is comprised of four chapters, and includes an introduction and biographical information. Chapter one covers his genealogy, taking a step back to identify the sources of his African and Caribbean roots that help to inform who he is personally and musically.
Chapter two sheds light upon his social and familial development in the historical context around and between World War I and The Great Depression. It touches upon the social, cultural, and economic existence of the immigrants who found themselves in and around the communities of Lower Roxbury. This section shows when and how Haynes’s talent emerged, and how through his gift he was able to build a sound reputation as a solid musician around New England.
From that reputation, which traveled all the way to New York, chapter three continues with Haynes’s professional career in Boston, then leaps to New York City via a one-way train ticket to join the famed Luis Russell Orchestra.
In chapter four, the author explains plans for additional research, and the continued synthesis and distillation thereof toward the eventual publication of biographical literature for both adults and children.
Continuing with part two of this work, chapter five includes musical analyses highlighting Haynes’s contributions on three particular recordings between 1945 and 1949.
In part three, chapters six through fourteen feature interview transcripts from nine individuals who provide an overview of expert insight spanning several generations on a variety of cultural, musical, and stylistic influences and contributions of Haynes’s artistry.
Finally, in part four, there are several appendices which represent visual images on topics approached throughout, and in support of the narrative.M.A.Includes bibliographical referencesby Leslie K. Hayne
Trig Point: an editorial
No full textThe Yellow Paper Edition 3 includes Art Writing graduates of 2022 and contributions from Kate Briggs, Rebecca Fortnum, Hazel Glass, Paul Mendez, Sara O’Brien Elizabeth Reeder, Stephen Sutcliffe & Susannah Thompson. Edited by the Art Writing Programme lead Laura Haynes.
With new writing from:
Laura Haynes ‘Trig Point’, Kate Briggs ‘Round a Corner’, Hazel Glass ‘Proxyerotics: Notes on Touch’, Clara Raillard ‘My Critical Murder Party’, Sara O’Brien ‘Porous Selves: A Provisional Index’, Paul Mendez & Susannah Thompson ‘A conversation on Rainbow Milk’, Marie-Chantal Hamrock ‘Sometimes Her Tracks are Dim’, Rebecca Fortnum ‘(Re)membering’, Alex Bottomley ‘Nigella’, Caitlin Merrett King ‘Ms Real Gets Indigestion’, Donald Butler ‘Post-Nut Clarity’, Stephen Sutcliffe ‘A Brain-Dump Comprising 8 Anecdotes Roughly About Translation’, Esraa Shanawaz ‘Collective Shock’, Elizabeth Reeder ‘On Surveying’, Rachel Loughran ‘Learning From Our Elders’, Lucie McLaughlin ‘Parting, Picking’, Ben Redhead ‘Score for Two Voice Turntables’, Ciaran Mac Domhnaill ‘The Disneyfication of the Gloryhole’, rebekah raine probert ‘Astronaut Suit’, and Sarah Long ‘Beat Time’
FIGURE. Authors (or co-authors) of more than five currently accepted specific and infraspecific cycad taxa (author abbreviations follow Calonje et al. 2022). in Etymological compendium of cycad names
No full textFIGURE. Authors (or co-authors) of more than five currently accepted specific and infraspecific cycad taxa (author abbreviations follow Calonje et al. 2022).Published as part of Haynes, Jody L., 2022, Etymological compendium of cycad names, pp. 1-31 in Phytotaxa 550 (1) on page 5, DOI: 10.11646/phytotaxa.550.1.1, http://zenodo.org/record/663061
Worker Needs and Voice in the US and the UK
No full textWorkers have responded differently to declining union density in the US and UK. US workers have unfilled demand for unions whereas many UK workers free-ride at unionized workplaces. To explain this difference, we create a scalar measure of worker needs for representation and relate desire for unionism to this measure and to the choices that the US and UK labor relations systems offer workers. Our measure of needs has similar properties across countries and is the single most important determinant of worker desire for unions and collective representation. Conditional on needs, we find that in both countries workers are more favourable to unions when management is positive toward unions, but also favor them when management strongly opposes unionism, compared to management having a neutral view. Much of the difference in the response of US and UK workers to declining unionism appears to be due to the different institutional arrangements for voice that the countries offer to workers.
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