Now showing items 1-20 of 122

  • 1,2,5-Selenadiazolo[3,4-b]pyrazines : synthesis from 3,4-Diamino-1,2,5-selenadiazole and Generation of Persistent Radical Anions 

    Konstantinova, Lidia S.; Bobkova, Irina E.; Nelyubina, Yulia V.; Chulanova, Elena A.; Irtegova, Irina G.; Vasilieva, Nadezhda V.; Sanz Camacho, Paula; Ashbrook, Sharon Elizabeth Marie; Hua, Guoxiong; Slawin, Alexandra Martha Zoya; Woollins, J Derek; Zibarev, Andrey V.; Rakitin, Oleg A. (2015-09) - Journal article
    Synthesis of 3,4-disubstituted and fused 1,2,5-selenadiazolo[3,4-b]pyrazines via previously unknown 3,4-diamino-1,2,5-selenadiazole has been achieved in moderate to high yields. The compounds synthesized were characterized ...
  • 1,4-Oxazine 

    Aitken, R Alan; Aitken, Kati Marianne; Carruthers, Phillip G; Jean, Marc-Alexandre; Slawin, Alexandra Martha Zoya (2013) - Journal article
    The fundamental heterocyclic compound 1,4-oxazine has been generated using FVP. It is the first parent heterocycle among all the possible isomeric oxazines, thiazines and their heavier atom analogues to be characterised ...
  • 1,5,6-Triphenyl-8-oxa-7-selena-6-phosphabicyclo[3.2.1]octane-6-selone 

    Hua, Guoxiong; Li, Yang; Slawin, Alexandra Martha Zoya; Woollins, J Derek (2008-01) - Journal article
    The structure of the title compound, C23H21OPSe2, consists of fused puckered five- and six-membered rings, PSeC2O and C5O, respectively, with a C2O bridgehead. The C5O ring adopts a chair conformation, whilst the C2PSeO ...
  • 6-exo-trig Michael addition-lactonizations for catalytic enantioselective chromenone synthesis 

    N P, Rifahath Mon; Cordes, David Bradford; Slawin, Alexandra Martha Zoya; Smith, Andrew David (2017-02-28) - Journal article
    The catalytic enantioselective 6-exo-trig Michael addition-lactonization of enone-acid substrates to form cis-chromenones with high diastereo- and enantiocontrol was developed using the commercially available isothiourea ...
  • Acenaphtho[5,6-cd]-1,2-dichalcogenoles and their platinum complexes 

    Diamond, Louise; Knight, Fergus Ross; Cordes, David Bradford; Ward, Andrew Christopher Clifford; Slawin, Alexandra Martha Zoya; Woollins, J Derek (2015-01-08) - Journal article
    A related series of bis(phosphine) platinum complexes 1–5 and 6–8 bearing dichalcogenate acenaphthylene ligands have been synthesised. The chalcogen–chalcogen bonds in the parent acenaphtho[5,6-cd]-1,2-dichalcogenoles ...
  • The activation of Woollins' reagent. Isolation of pyridine stabilised PhPSe2 

    Ascherl, Laura; Nordheider, Andreas; Athukorala Arachchige, Kasun Sankalpa; Cordes, David Bradford; Karaghiosoff, Konstantin; Buehl, Michael; Slawin, Alexandra Martha Zoya; Woollins, J Derek (2014-06-14) - Journal article
    Woollins' reagent (WR, (PhPSe2)2) plays an essential role in the selenation of organic compounds. Reaction of WR with pyridine gives the P(V) species PhPSe2 stabilised by pyridine coordination which is the first ...
  • All-cis 1,2,3,4,5,6-hexafluorocyclohexane is a facially polarised cyclohexane 

    Keddie, Neil Steven; Slawin, Alexandra Martha Zoya; Lebl, Tomas; Philp, Douglas; O'Hagan, David (2015-04) - Journal article
    The highest-energy stereoisomer of 1,2,3,4,5,6-hexafluorocyclohexane, in which all of the fluorines are ‘up’, is prepared in a 12-step protocol. The molecule adopts a classic chair conformation with alternate C–F bonds ...
  • Application of four-membered ring chalcogenation reagents to the synthesis of new phosphorus-chalcogen heterocycles 

    Hua, Guoxiong; Cordes, David Bradford; Slawin, Alexandra Martha Zoya; Woollins, J Derek (2016-08-29) - Journal article
    The reaction of four-membered ring chalcogenation reagents such as Lawesson’s reagent, 2,4-diferrocenyl-1,3,2,4-diathiadiphosphetane 2,4-disulfide (the ferrocene analogy of Lawesson’s reagent) and Woollins’ reagent with ...
  • Assessing dimerisation degree and cooperativity in a biomimetic small-molecule model by pulsed EPR 

    Ackermann, Katrin; Giannoulis, Angeliki; Cordes, David Bradford; Slawin, Alexandra Martha Zoya; Bode, Bela Ernest (2015-01) - Journal article
    Pulsed electron paramagnetic resonance (EPR) spectroscopy is gaining increasing importance as a complementary biophysical technique in structural biology. Here, we describe the synthesis, optimisation, and EPR titration ...
  • Asymmetric isothiourea-catalysed formal [3+2] cycloadditions of ammonium enolates with oxaziridines 

    Smith, Siobhan Rose; Fallan, Charlene; Taylor, James Edward; McLennan, Ross Sinclair; Daniels, David Sydney Bernard; Morrill, Louis Christian; Slawin, Alexandra Martha Zoya; Smith, Andrew David (2015-07-13) - Journal article
    A highly enantioselective Lewis base-catalysed formal [3+2] cycloaddition of ammonium enolates and oxaziridines to give stereodefined oxazolidin-4-ones in high yield is described. Employing an enantioenriched oxaziridine ...
  • An asymmetric pericyclic cascade approach to 3-alkyl-3-aryloxindoles : generality, applications and mechanistic investigations 

    Richmond, Edward; Ling, Kenneth Bruce; Duguet, Nicolas Fabien Denis; Manton, Lois B.; Çelebi-Ölçüm, Nihan; Lam, Yu-hong; Alsancak, Sezen; Slawin, Alexandra Martha Zoya; Houk, K. N.; Smith, Andrew David (2015-02-14) - Journal article
    The reaction of L-serine derived N-arylnitrones with alkylarylketenes generates asymmetric 3-alkyl-3-aryloxindoles in good to excellent yields (up to 93%) and excellent enantioselectivity (up to 98% ee) via a pericyclic ...
  • Automated chemical crystallography 

    Fuller, Amy; Scott-Hayward, Lindesay Alexandra Sarah; Li, Yang; Buehl, Michael; Slawin, Alexandra Martha Zoya; Woollins, J Derek (2010-04-28) - Journal article
    The first fully automated small-molecule robotic X-ray diffractometer is described. After demonstrating the utility of the instrument using multiple samples of ammonium bitartrate, we investigated the conformational chirality ...
  • Blue-to-green emitting neutral Ir(III) complexes bearing pentafluorosulfanyl groups : a combined experimental and theoretical study 

    Pal, Amlan Kumar; Henwood, Adam Francis; Cordes, David Bradford; Slawin, Alexandra Martha Zoya; Samuel, Ifor David William; Zysman-Colman, Eli (2017-07-03) - Journal article
    A structure-property relationship study of neutral heteroleptic ( 1 and 2 , [Ir(C^N)2(L^X)]) and homoleptic ( 3 and 4 , fac-[Ir(C^N)3]) Ir(III) complexes [where L^X = anionic 2,2,6,6-tetramethylheptane-3,5-dionato-κO3,κO6 ...
  • Catalyst-free photoredox addition–cyclisations : exploitation of natural synergy between aryl acetic acids and maleimide 

    Walton, John Christopher; Manley, David W.; Mills, Andrew; O'Rourke, Christopher; Slawin, Alexandra Martha Zoya (2014-03-20) - Journal article
    Suitably functionalised carboxylic acids undergo a previously unknown photoredox reaction when irradiated with UVA in the presence of maleimide. Maleimide was found to synergistically act as a radical generating photoxidant ...
  • Cationic platinum(II) complexes bearing Aryl-BIAN ligands : synthesis, structural and optoelectronic characterization 

    O’Brien, Cameron; Wong, Michael Yin; Cordes, David Bradford; Slawin, Alexandra Martha Zoya; Zysman-Colman, Eli (2015-01-12) - Journal article
    Five cationic platinum(II) complexes bearing a 2-(3’-substituted-aryl)pyridine cyclometalating ligand (C^N) and a neutral Ar-BIAN ligand have been synthesized: [Pt(ppy)(PhBIAN)]PF6, 1, [Pt(3Fppy)(PhBIAN)]PF6, 2, ...
  • Chiral iridium(III) complexes in light-emitting electrochemical cells : exploring the impact of stereochemistry on the photophysical properties and device performances 

    Rota Martir, Diego; Momblona, Cristina; Pertegás, Antonio; Cordes, David Bradford; Slawin, Alexandra Martha Zoya; Bolink, Henk J.; Zysman-Colman, Eli (2016-12-14) - Journal article
    Despite hundreds of cationic bis-cyclometalated iridium(III) complexes having been explored as emitters for Light-Emitting Electrochemical Cells (LEECs), uniformly their composition has been in the form of a racemic mixture ...
  • Chiral wide bite angle diphosphine ligands : synthesis, coordination chemistry and application in Pd-catalyzed allylic alkylation 

    Czauderna, Christine; Jarvis, Amanda; Heutz, Frank; Cordes, David Bradford; Slawin, Alexandra Martha Zoya; van der Vlugt, Jarl Ivar; Kamer, Paul C J (2015-05-11) - Journal article
    A series of diphosphine ligands bearing ester- and ether-modified diphenylether backbones have been prepared. The introduction of carboxylic acid or ether auxiliaries in the ortho-positions relative to the diphenylphosphine ...
  • Conformational dependence of through-space tellurium-tellurium spin-spin coupling in peri-substituted bis(tellurides) 

    Knight, Fergus Ross; Diamond, Louise; Athukorala Arachchige, Kasun Sankalpa; Sanz Camacho, Paula; Randall, Rebecca Amy Michele; Ashbrook, Sharon Elizabeth Marie; Buehl, Michael; Slawin, Alexandra Martha Zoya; Woollins, J Derek (2015-02-23) - Journal article
    Three related series of peri-substituted bis(tellurides) bearing naphthalene, acenaphthene and acenaphthylene backbones [Nap/Acenap/Aceyl(TeY)2 (Nap = naphthalene-1,8-diyl N; Acenap = acenaphthene-5,6-diyl A; Aceyl = ...
  • Coordination polymers of ZnII and 5-methoxy isophthalate 

    McCormick, Laura Jayne; Morris, Samuel Alexander; Teat, Simon J.; McPherson, Matthew Joseph; Slawin, Alexandra Martha Zoya; Morris, Russell Edward (2015-10-28) - Journal article
    Solvothermal reaction of Zn(OAc)2 and 5-methoxy isophthalic acid (H2MeOip) in aqueous alcohols ROH (R = H, Me, Et, or iPr) affords four different novel coordination polymers. Zn2(HMeOip)(MeOip)(OAc) (1) forms as a 1D 'ribbon ...
  • Copper(I) complexes bearing carbenes beyond classical N-heterocyclic carbenes : synthesis and catalytic activity in “click chemistry” 

    Bidal, Yannick Daniel; Lesieur, Mathieu; Melaimi, Mohand; Nahra, Fady; Cordes, David Bradford; Athukorala Arachchige, Kasun Sankalpa; Slawin, Alexandra Martha Zoya; Bertrand, Guy; Cazin, Catherine S.J. (2015-10-12) - Journal article
    The synthesis and characterization of abnormal N-heterocyclic carbene, cyclic (alkyl)(amino)carbene, and mesoionic carbene copper(I) complexes are reported. These organometallic species are obtained via a versatile and ...