C. A. Ramsden

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Introduction to Volume 2

C. A. Ramsden, 2005 .

Bicyclic 5-6 Systems with One (Bridgehead) Ring Junction Nitrogen Atom: Two Extra Heteroatoms 1:1

C. A. Ramsden, Richard J. K. Taylor, A. Katritzky, 2008 .

Studies directed towards conformationally restricted nucleosides

C. A. Ramsden, M. Humphries, A. Curtis, 2000 .

4.01 – Structure of Five-membered Rings with Two or More Heteroatoms

C. A. Ramsden, A. Katritzky, J. Joule, 1984 .

Heterocyclic mesomeric betaines

C. A. Ramsden, W. Ollis, Stepher P. Stanforth, 1985 .

The influence of exocyclic lone pairs on the bonding and geometry of type A mesoionic rings

C. A. Ramsden, W. P. Oziminski, 2021, Structural Chemistry.

The influence of aza-substitution on azole aromaticity

C. A. Ramsden, C. Ramsden, 2010 .

Synthesis of meso-ionic anhydro-2-arylamino-1,3,4-oxadiazolium hydroxides

C. A. Ramsden, W. Ollis, 1971 .

Cyclic meso-ionic compounds. Part IX. Synthesis, spectroscopic properties, and chemistry of 1,3,4-thiadiazolium-2-olates and 1,3,4-oxadiazolium-2-thiolates

C. A. Ramsden, W. Ollis, A. R. Mccarthy, 1974 .

Cyclic meso-ionic compounds. Part 20. Mass spectra of meso-ionic heterocycles

C. A. Ramsden, W. Ollis, 1974 .

Quinone chemistry and melanogenesis.

C. A. Ramsden, E. Land, P. Riley, 2004, Methods in enzymology.

Sigma- and pi- electron structure of aza-azoles

C. A. Ramsden, T. M. Krygowski, W. P. Oziminski, 2011, Journal of molecular modeling.

Melanogenesis-targeted anti-melanoma prodrug development: effect of side-chain variations on the cytotoxicity of tyrosinase-generated ortho-quinones in a model system

C. A. Ramsden, E. Land, C. Cooksey, 1995 .

Melanogenesis-targeted anti-melanoma pro-drug development: effect of side-chain variations on the cytotoxicity of tyrosinase-generated ortho-quinones in a model screening system.

C. A. Ramsden, E. Land, C. Cooksey, 1997, European journal of cancer.

OXIDATIVE REARRANGEMENT AND CYCLISATION OF N-SUBSTITUTED AMIDINES USING IODINE(III) REAGENTS AND THE INFLUENCE OF LEAVING GROUP ON MODE OF REACTION

C. A. Ramsden, H. Rose, C. Ramsden, 1997 .

Rearrangement and cyclo-α-elimination of N-substituted amidines using (diacetoxyiodo)benzene

C. A. Ramsden, H. Rose, C. Ramsden, 1995 .

Characterisation of new efaroxan derivatives for use in purification of imidazoline-binding sites.

C. A. Ramsden, N. Morgan, J. Chapman, 1998, European journal of pharmacology.

Evidence consistent with the requirement of cresolase activity for suicide inactivation of tyrosinase.

C. A. Ramsden, E. Land, M. Stratford, 2008, The Tohoku journal of experimental medicine.

The mechanism of suicide-inactivation of tyrosinase: a substrate structure investigation.

C. A. Ramsden, E. Land, P. Riley, 2007, The Tohoku journal of experimental medicine.

5-Aminoimidazole chemistry

C. A. Ramsden, 1995 .

Synthesis and quantitative structure-activity relationships of antiallergic 2-hydroxy-N-1H-tetrazol-5-ylbenzamides and N-(2-hydroxyphenyl)-1H-tetrazole-5-carboxamides.

C. A. Ramsden, A. Penrose, E. Lunt, 1986, Journal of medicinal chemistry.

Medicinal chemistry: a multidisciplinary science

C. A. Ramsden, 1994 .

5,6-Dihydroxyindoles and Indole-5,6-diones

C. A. Ramsden, E. Land, A. Napolitano, 2005 .

Affinity isolation of imidazoline binding proteins from rat brain using 5‐amino‐efaroxan as a ligand

C. A. Ramsden, M. Dunne, K. Cosgrove, 1999, FEBS letters.

Preparation of novel 2-(benzo[b]furan-2-yl)-1H-imidazolines for photoaffinity labelling and affinity isolation of imidazoline binding

C. A. Ramsden, N. Morgan, Proteins J. Clews, 2001 .

Heterocyclic Betaine Derivatives of Alternant Hydrocarbons

C. A. Ramsden, C. Ramsden, 1980 .

Tyrosinase autoactivation and the chemistry of ortho-quinone amines.

C. A. Ramsden, E. Land, P. Riley, 2003, Accounts of chemical research.

On the Modes of Reaction of Xenon Difluoride with Organic Substrates: The Influence of Solvent and Vessel

C. A. Ramsden, Rachel G. Smith, 1998 .

Rearrangement and radical mediated decarboxylation of trimethylsilyl benzoates using xenon difluoride

C. A. Ramsden, P. Nongkunsarn, 1996 .

Rapid Fluorodesilylation of Aryltrimethylsilanes Using Xenon Difuoride: An Efficient New Route to Aromatic Fluorides

C. A. Ramsden, Aileen P. Lothian, 1993 .

Heterocycles in organic synthesis. Part 6. Nucleophilic displacements of primary amino-groups via 2,4,6-triphenylpyridinium salts

C. A. Ramsden, A. Katritzky, R. J. Blade, 1979 .

ipso-Fluorination of aryltrimethylsilanes using xenon difluoride

C. A. Ramsden, Rachel G. Smith, Aileen P. Lothian, 2011 .

Xenon difluoride exchanges fluoride under mild conditions: a simple preparation of [(18)F]xenon difluoride for PET and mechanistic studies.

C. A. Ramsden, V. Pike, F. Aigbirhio, 2001, Journal of the American Chemical Society.

Fluorodecarboxylation, rearrangement and cyclisation: the influence of structure and environment on the reactions of carboxylic acids with xenon difluoride

C. A. Ramsden, Maxine M. Shaw, C. Ramsden, 2009 .

The reaction of xenon difluoride with chloroform

C. A. Ramsden, Rachel G. Smith, Maxine M. Shaw, 2002 .

Studies using hypervalent reagents of Te, I and Xe: A heterocyclic betaine saga

C. A. Ramsden, C. Ramsden, 1999 .

Rearrangement and Radical‐Mediated Decarboxylation of Trimethylsilyl Benzoates Using Xenon Difluoride.

C. A. Ramsden, P. Nongkunsarn, 1996 .

Non-bonding molecular orbitals and the chemistry of non-classical organic molecules

C. A. Ramsden, C. Ramsden, 1994 .

Rapid Fluorodesilylation of Aryltrimethylsilanes Using Xenon Difuoride: An Efficient New Route to Aromatic Fluorides

C. A. Ramsden, Aileen P. Lothian, C. Ramsden, 1994 .

Carbon–carbon bond formation via thermal intermolecular hydrogen atom transfer: two serendipitous heterocyclic examples

C. A. Ramsden, Richard H. Jones, R. J. Hamlyn, 2000 .

Reactions of thionyl chloride with C-methyl heterocycles. Part 1. The formation of dichloro(2-quinolyl)methanesulphenyl chlorides from 2-methylquinolines

C. A. Ramsden, D. Lythgoe, I. Mcclenaghan, 1988 .

A Quantitative Analysis of Factors Influencing Ease of Formation and σ-Bonding Strength of Oxa- and Thia-N-Heterocyclic Carbenes.

C. A. Ramsden, W. P. Oziminski, C. Ramsden, 2017, The Journal of organic chemistry.

Quantitative Index of the Relative Ease of Formation and σ-Bonding Strength of N-Heterocyclic Carbenes.

C. A. Ramsden, W. P. Oziminski, C. Ramsden, 2016, The Journal of organic chemistry.

Heterocyclic mesomeric betaines: the recognition of five classes and nine sub-classes based on connectivity-matrix analysis

C. A. Ramsden, C. Ramsden, 2013 .

Synthesis, spectroscopic properties, and chemistry of 4,6-diphenyl-2-pyridones and 4,6-diphenylpyridine-2-thiones and their relationship to isomeric species

C. A. Ramsden, A. Katritzky, A. Afridi, 1977 .

The Conversion of Amines into Iodides

C. A. Ramsden, A. Katritzky, N. Eweiss, 1977 .

4-Cyanomethyl-ortho-quinone tautomerism and the structure of the dienophile in Gates' morphine synthesis

C. A. Ramsden, E. Land, P. Riley, 2003 .

Dopamine quinone chemistry: a study of the influence of amide, amidine and guanidine substituents [-NH-CX-Y] on the mode of reaction.

C. A. Ramsden, E. Land, A. Perona, 2009, Organic & biomolecular chemistry.

2-Aminofurans and 3-Aminofurans

C. A. Ramsden, V. Milata, C. Ramsden, 2006 .

Heterocycle-Forming Reactions of 1,2-Benzoquinones

C. A. Ramsden, C. Ramsden, 2010 .

Studies of para-quinomethane formation during the tyrosinase-catalyzed oxidation of 4-alkylcatechols

C. A. Ramsden, E. Land, P. Riley, 2008 .

An MO study of regioselective amine addition to ortho-quinones relevant to melanogenesis

C. A. Ramsden, E. Land, P. Riley, 2006 .

Mechanistic studies of melanogenesis: the influence of N-substitution on dopamine quinone cyclization.

C. A. Ramsden, E. Land, N. Smit, 2006, Pigment cell research.

Oxidation of N-substituted dopamine derivatives: irreversible formation of a spirocyclic product.

C. A. Ramsden, E. Land, A. Perona, 2005, Organic and biomolecular chemistry.

Formation of para-quinomethanes via 4-aminobutylcatechol oxidation and ortho-quinone tautomerism.

C. A. Ramsden, E. Land, P. Riley, 2003, Organic & biomolecular chemistry.

Mechanistic studies of catechol generation from secondary quinone amines relevant to indole formation and tyrosinase activation.

C. A. Ramsden, E. Land, P. Riley, 2003, Pigment cell research.

Pulse radiolysis studies of ortho-quinone chemistry relevant to melanogenesis.

C. A. Ramsden, E. Land, P. Riley, 2001, Journal of photochemistry and photobiology. B, Biology.

Oxidative cyclisation of N,N-dialkylcatechol amines to heterocyclic betaines via o-quinones: synthetic, pulse radiolytic and enzyme studies

C. A. Ramsden, E. Land, C. Cooksey, 2000 .

Tyrosinase kinetics: failure of the auto-activation mechanism of monohydric phenol oxidation by rapid formation of a quinomethane intermediate.

C. A. Ramsden, E. Land, C. Cooksey, 1998, The Biochemical journal.

Evidence of the Indirect Formation of the Catecholic Intermediate Substrate Responsible for the Autoactivation Kinetics of Tyrosinase*

C. A. Ramsden, E. Land, C. Cooksey, 1997, The Journal of Biological Chemistry.

2‐Aminofurans and 3‐Aminofurans

C. A. Ramsden, V. Milata, 2006 .

The oxidative rearrangement of furan-2-carboximidamides: preparation and properties of 2-acylaminofurans

C. A. Ramsden, S. Coles, M. Hursthouse, 2001 .

4-Unsubstituted, 5-Amino and 5-Unsubstituted, 4-Aminoimidazoles

C. A. Ramsden, D. Lythgoe, C. Ramsden, 1994 .

A study of 2-aminofurans

C. A. Ramsden, D. Lythgoe, I. Mcclenaghan, 1993 .

Meso-ionic heterocycles (1976–1980)

C. A. Ramsden, C. G. Newton, C. Ramsden, 1982 .

A DFT and ab initio study of conjugated and semi-conjugated mesoionic rings and their covalent isomers

C. A. Ramsden, W. P. Oziminski, 2015 .

Oxidative rearrangement of imines to formamides using sodium perborate

C. A. Ramsden, P. Nongkunsarn, C. Ramsden, 1997 .

Tyrosinase: the four oxidation states of the active site and their relevance to enzymatic activation, oxidation and inactivation.

C. A. Ramsden, P. Riley, Christopher A Ramsden, 2014, Bioorganic & medicinal chemistry.

Preparation, structure and addition reactions of 4- and 5-aminoimidazoles

C. A. Ramsden, D. Lythgoe, I. Mcclenaghan, 1992 .

Heterocyclic mesomeric betaines. Part 4. Reductive cyclization of derivatives of 7-methyl-2-(2′-nitrophenyl)imidazo[l,2-a]pyridine

C. A. Ramsden, W. Ollis, S. Stanforth, 1989 .

The synthesis of heterocycles via addition–elimination reactions of 4- and 5-aminoimidazoles

C. A. Ramsden, D. Lythgoe, I. Mcclenaghan, 1992 .

Studies of the competing rates of catechol oxidation and suicide inactivation of tyrosinase

C. A. Ramsden, P. Riley, 2010 .

Mechanistic studies of tyrosinase suicide inactivation

C. A. Ramsden, P. Riley, 2010 .

The influence of catechol structure on the suicide-inactivation of tyrosinase.

C. A. Ramsden, M. Stratford, P. Riley, 2009, Organic & biomolecular chemistry.

Preparation of the I3 Imidazoline Receptor Antagonist KU14R and Related 2,3-Dihydrobenzo[b]furan Derivatives

C. A. Ramsden, N. Morgan, J. Clews, 2004 .

Imidazolines and Pancreatic Hormone Secretion a

C. A. Ramsden, N. Morgan, S. Chan, 1999, Annals of the New York Academy of Sciences.

3.4 – Reactivity of Five-membered Rings with Two or More Heteroatoms*

C. A. Ramsden, A. Katritzky, J. Joule, 2010 .

Rapid halogen substitution and dibenzodioxin formation during tyrosinase-catalyzed oxidation of 4-halocatechols.

C. A. Ramsden, M. Stratford, P. Riley, 2011, Chemical research in toxicology.

An oxidative rearrangement of C,N-diarylaldimines to formamides using sodium perborate

C. A. Ramsden, P. Nongkunsarn, 1993 .

Mesomeric betaine derivatives of heteropentalenes

C. A. Ramsden, C. Ramsden, 1977 .

A MINDO/3 and NDDO study of antiaromatic three-membered rings and their valence tautomers

C. A. Ramsden, M. Dewar, 1973 .

Heterocyclic mesomeric betaines. Part 5. Synthesis and cycloaddition reactions of hetero derivatives of the 2-methylene-1,2-dihydro-1,3-phenalenylene dianion

C. A. Ramsden, W. Ollis, S. Stanforth, 1989 .

Ground states of molecules. XXIX. MINDO/3 calculations of compounds containing third row elements

C. A. Ramsden, Michael J. S. Dewar, M. Dewar, 1975 .

Biological Chemistry of o‐Quinones

C. A. Ramsden, E. Land, P. Riley, 2011 .

Tyrosinase‐Mediated Cytotoxicity of 4‐Substituted Phenols: Use of QSAR to Forecast Reactivities of Thiols towards the Derived ortho‐Quinones

C. A. Ramsden, E. Land, C. Cooksey, 1996 .

Dopaquinone redox exchange with dihydroxyindole and dihydroxyindole carboxylic acid.

C. A. Ramsden, E. Land, A. Napolitano, 2006, Pigment cell research.

A mild and selective route to p-quinomethanes using dianisyltellurium oxide

C. A. Ramsden, E. Land, P. Riley, 1998 .

Novel heterocyclic betaines relevant to the mechanism of tyrosinase-catalysed oxidation of phenols

C. A. Ramsden, E. Land, C. Cooksey, 1998 .

Tyrosinase‐mediated cytotoxicity of 4‐substituted phenols: Quantitative structure‐thiol-reactivity relationships of the derived o‐quinones

C. A. Ramsden, E. Land, C. Cooksey, 1994, Anti-cancer drug design.

4.37 – Two Fused Five-membered Heterocyclic Rings: (ii) Non-classical Systems

C. A. Ramsden, C. Ramsden, 1984 .

PREPARATION, CHARACTERISATION AND SLOW QUANTITATIVE DISSOCIATION OF A NOVEL ASYMMETRIC N-UNSUBSTITUTED DIALKYLSULFIMIDE

C. A. Ramsden, A. Curtis, M. R. Raza, 1999 .

Cyclic meso-ionic compounds. Part 16. Synthesis, spectroscopic properties, and chemistry of 1,2,3,4-oxatriazolium-5-thiolates, 1,2,3,4-thiatriazolium-5-olates, and 1,2,3,4-thiatriazolium-5-thiolates

C. A. Ramsden, W. Ollis, Robert N. Hanley, 1979 .

Heterocycles in organic synthesis. Part 40. Oxidation of 2,4,6-triarylpyridinium betaines and 2,4,6-triarylpyridinium perchlorates by hydrogen peroxide

C. A. Ramsden, A. Katritzky, R. Harlow, 1980 .

Semi-Conjugated Heteroaromatic Rings: A Missing Link in Heterocyclic Chemistry

C. A. Ramsden, C. Ramsden, 2016 .

Mechanistic studies of the inactivation of tyrosinase by resorcinol.

C. A. Ramsden, M. Stratford, P. Riley, 2013, Bioorganic & medicinal chemistry.

Investigation of the anomalous action of 5‐hydroxyresorcinol on tyrosinase

C. A. Ramsden, E. Land, P. Riley, 2016, Pigment cell & melanoma research.

The influence of hydroquinone on tyrosinase kinetics.

C. A. Ramsden, M. Stratford, P. Riley, 2012, Bioorganic & medicinal chemistry.

Tyrosinase-mediated cytotoxicity of 4-substituted phenols: prediction of thiol reactivity of the derived o-quinones

C. A. Ramsden, E. Land, C. Cooksey, 1995 .

Mechanistic aspects of the tyrosinase oxidation of hydroquinone.

C. A. Ramsden, P. Riley, C. Ramsden, 2014, Bioorganic & Medicinal Chemistry Letters.

Bicyclic 5-6 Systems: Six and Seven Heteroatoms

C. A. Ramsden, 2008 .

5,6‐Dihydroxyindoles and Indole‐5,6‐diones

C. A. Ramsden, E. Land, A. Napolitano, 2006 .

A novel synthesis of purine and deazapurine derivatives from 5-aminoimidazoles

C. A. Ramsden, D. Lythgoe, I. Mcclenaghan, 1989 .

A Novel Synthesis of Purine and Deazapurine Derivatives from 5-Aminoimidazoles.

C. A. Ramsden, D. Lythgoe, I. Mcclenaghan, 1989 .

A DFT study of isomeric conjugated, cross-conjugated and semi-conjugated six-membered heterocyclic mesomeric betaines

C. A. Ramsden, W. P. Oziminski, 2014 .

The influence of exocyclic lone pairs on the bonding and geometry of type A mesoionic rings

C. A. Ramsden, W. P. Oziminski, 2021, Structural Chemistry.

The influence of electronegativity on triangular three-centre two-electron bonds: the relative stability of carbonium ions, π-complex chemistry and the −2hβ effect

C. A. Ramsden, C. Ramsden, 2004 .

Valence tautomerism and recyclisation of type B mesoionic tetrazoles: a computational study

C. A. Ramsden, W. P. Oziminski, 2021, Structural Chemistry.

An ab initio study of the valence tautomerism of type B mesoionic rings

C. A. Ramsden, W. P. Oziminski, 2019, Tetrahedron Letters.

Synthesis and Reactions of Furo[2,3-b]pyrroles

C. A. Ramsden, A. Lyčka, M. Dandárová, 1997 .

Preparation of pyridine-stretched 2’-deoxyhypoxanthosine phosphoramidite

C. A. Ramsden, Michael L. Davis, Wei Li, 2017 .

Cyclic meso-ionic compounds. Part 17. Synthesis, spectroscopic properties, and chemistry of 1,2,3,4-oxatriazolium-5-aminides and 1,2,3,4-tetrazolium-5-olates

C. A. Ramsden, W. Ollis, Robert N. Hanley, 1979 .

Cyclic meso-ionic compounds. Part 19. The reaction of 5-ethoxy-1,2,3,4-tetrazolium and 5-ethoxy-1,2,3,4-thiatriazolium tetrafluoroborates with nucleophiles. The preparation of 1,2,3,4-tetrazolium- and 1,2,3,4-thiatriazolium-5-dicyanomethylides

C. A. Ramsden, W. Ollis, Robert N. Hanley, 1979 .

Cyclic meso-ionic compounds. Part 20. Mass spectra of meso-ionic heterocycles

C. A. Ramsden, W. Ollis, 1974 .

Heterocyclic rearrangements. Part XIV. Attempts to activate ring-opening–ring-closure rearrangements with carbon as the central atom

C. A. Ramsden, A. Katritzky, A. Afridi, 1976 .

Pyridines as leaving groups in synthetic transformations: Nucleophilic displacements of amino groups, and novel preparations of nitriles and isocyanates

C. A. Ramsden, A. Katritzky, R. J. Blade, 1976 .

The reactions of C-methylheterocycles with thionyl chloride. Part 3. The transformation of some five-and six-membered heterocycles

C. A. Ramsden, D. Lythgoe, I. Mcclenaghan, 1989 .

Evidence that the ability of imidazoline compounds to stimulate insulin secretion is not due to interaction with sigma receptors.

C. A. Ramsden, N. Morgan, A. L. Pallett, 1997, European journal of pharmacology.

Preparation of Analogues of Efaroxan and KU14R as Potential Imidazoline Receptor Subtype 3 Ligands

C. A. Ramsden, N. Morgan, Richard D. Farn, 2008 .

Oxidative decarbonylation of β-arylpyruvic acids using sodium perborate

C. A. Ramsden, B. Sargent, Nicholas Morrow, 1998 .

Oxidative Decarbonylation of β‐Arylpyruvic Acids Using Sodium Perborate.

C. A. Ramsden, B. Sargent, Nicholas Morrow, 1998 .

A NOVEL DECARBONYLATION OF HETEROCYCLIC PYRUVIC ACID DERIVATIVES USING SODIUM PERBORATE

C. A. Ramsden, B. Sargent, Christiaan D. Wallett, 1996 .

Preparation of Analogues of Efaroxan and KU14R as Potential Imidazoline Receptor Subtype 3 Ligands.

C. A. Ramsden, N. Morgan, Richard D. Farn, 2008 .

Reactivity of Small and Large Rings

C. A. Ramsden, A. Katritzky, J. Joule, 2010 .

Reactions of pyridinium salts and pyridinium betaines with hydrogen peroxide: novel ring transformations to pyrroles, β-hydroxylation, and ring-opening

C. A. Ramsden, A. Katritzky, R. Harlow, 1979 .

Routes to N-vinyl-nitroimidazoles and N-vinyl-deazapurines

C. A. Ramsden, R. Clayton, 2004 .

Routes to N-Vinyl-Nitroimidazoles and N-Vinyl-Deazapurines.

C. A. Ramsden, R. Clayton, 2005 .

Synthesis of pyridine-stretched 2′-deoxynucleosides

C. A. Ramsden, Michael L. Davis, W. Fraser, 2002 .

A Fresh AIR Synthesis

C. A. Ramsden, Mark J. Humphries, 1999 .

A Short Synthesis and Biomimetic Transformation of 5-Aminoimidazole Ribonucleoside (AIRs)

C. A. Ramsden, M. Humphries, 1995 .

Synthesis of Pyridine-Stretched 2′-Deoxynucleosides.

C. A. Ramsden, Michael L. Davis, W. Fraser, 2002 .

A Short Synthesis and Biomimetic Transformation of 5-Aminoimidazole Ribonucleoside (AIRs).

C. A. Ramsden, Mark J. Humphries, 1995 .

N-vinyl-nitroimidazole cycloadditions : Potential routes to nucleoside analogues

C. A. Ramsden, R. Clayton, 2005 .

DFT Study of 1,4-Diazonium-3,6-diolates: Monocyclic Representatives of Unexplored Semi-Conjugated Heterocyclic Mesomeric Betaines.

C. A. Ramsden, W. P. Oziminski, 2023, The Journal of organic chemistry.

Toxicological Aspects of Melanin and Melanogenesis

C. A. Ramsden, E. Land, P. Riley, 2007 .

A Study of 2‐Aminofurans.

C. A. Ramsden, D. Lythgoe, I. Mcclenaghan, 2010 .