Zobrazeno 1 - 5
of 5
pro vyhledávání: '"Dara Coyne"'
Autor:
Dara Coyne, Rory A. More O'Ferrall, David A. Lawlor, Aoife C. MacCormac, Derek R. Boyd, Jaya Satyanarayana Kudavalli
Publikováno v:
Journal of the American Chemical Society. 133:19718-19728
Cis- and trans-1,2-dihydrodiol isomers of benzene undergo acid-catalyzed dehydration to form phenol. In principle the isomeric substrates react through a common β-hydroxybenzenium (cyclohexadienyl) carbocation. Notwithstanding, the isomers show a la
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::abd585238f59737d98fb44ad38c6e69a
https://doi.org/10.1021/ja207160z
https://doi.org/10.1021/ja207160z
Publikováno v:
The Journal of organic chemistry. 77(1)
Rate constants for acid-catalyzed dehydration of cis-2-substituted 1,2-dihydro-naphthols are well correlated by the Taft relationship log k = -0.49 - 8.8σ(I), with minor negative deviations for OH and OMe. By contrast the trans substituents show a p
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::c619ea6f8d1bc491790913d1488773c0
https://pubmed.ncbi.nlm.nih.gov/22122118
https://pubmed.ncbi.nlm.nih.gov/22122118
Autor:
David A. Lawlor, James R. Keeffe, Aoife C. MacCormac, Derek R. Boyd, Dara Coyne, S. Nagaraja Rao, Rory A. More O’Ferrall, Jaya S. Kudavalli, Narain D. Sharma
Publikováno v:
Organic letters. 12(23)
Benzene-cis- and trans-1,2-dihydrodiols undergo acid-catalyzed dehydration at remarkably different rates: k(cis)/k(trans) = 4500. This is explained by formation of a β-hydroxycarbocation intermediate in different initial conformations, one of which
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::55997b8265fbfdeb57f705292147f417
https://pubmed.ncbi.nlm.nih.gov/21053960
https://pubmed.ncbi.nlm.nih.gov/21053960
Autor:
Dara Coyne, Rory A. More O'Ferrall, Stephen E. Eustace, Michael C. Courtney, Anne-Gaelle Collot
Publikováno v:
The Journal of organic chemistry. 74(9)
A study of the enolization of phenylacetylpyrazine (PzCOCH(2)Ph) catalyzed by acid, base and metal ions in aqueous solution shows, unusually, that metal ions are more effective catalysts than protons, e.g., for zinc k(Zn)/k(H) = 600. Such behavior co
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::00d67367aad7ed766a9898ab772a9128
https://pubmed.ncbi.nlm.nih.gov/19344167
https://pubmed.ncbi.nlm.nih.gov/19344167
Autor:
Jaya S. Kudavalli, Derek R. Boyd, Dara Coyne, James R. Keeffe, David A. Lawlor, Aoife C. MacCormac, Rory A. More O’Ferrall, S. Nagaraja Rao, Narain D. Sharma
Publikováno v:
Organic Letters; Dec2010, Vol. 12 Issue 23, p5550-5553, 4p