Browsing by Author "Arnott, Gareth E."

Now showing 1 - 4 of 4
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    Attempted synthesis of a meta-metalated calix[4]arene
    (Beilstein-Institut, 2019) Jurisch, Christopher D.; Arnott, Gareth E.
    ENGLISH ABSTRACT: An evidence for the formation of a rare meta-metalated inherently chiral calix[4]arene is described. Our strategy involved using a mesoionic carbene to direct C–H activation, but proved to form an unexpectedly unstable intermediate that was identified through high-resolution mass spectrometry. On route to our target, a new optimized method to mononitrocalix[4]arenes was developed, including optimized and high yielding transformations to azide and 1,2,3-triazole derivatives which may have application in other areas of research.
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    A calix[4]arene based boronic acid catalyst for amide bond formation : proof of principle study
    (ARKAT USA, 2018-06-25) Mafaune, Asslly Tafara; Arnott, Gareth E.
    ENGLISH ABSTRACT: A calix[4]arene boronic acid was synthesized and tested for catalysis in amide formation. The results were positive and paved the way for future designs, even though protodeboronation was observed under the conditions employed.
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    A calix[4]arene based boronic acid catalyst for amide bond formation: proof of principle study
    (ARKAT USA, Inc., 2019-06) Mafaune, Asslly Tafara; Arnott, Gareth E.
    ENGLISH ABSTRACT: A calix[4]arene boronic acid was synthesized and tested for catalysis in amide formation. The results were positive and paved the way for future designs, even though protodeboronation was observed under the conditions employed.
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    ipso-Bromination of tert-butylcalix[4]arenes
    (ARKAT USA, 2020) Snayer, Tregen M.; Bose, Sritama; Arnott, Gareth E.
    The ipso-bromination of calix[4]arenes using bromine has been investigated and provides a direct method to tetra-bromocalix[4]arene in a single step in excellent yield (>90%). The method is also applicable to directly forming tribromocalix[4]arene in appreciable amounts (>60%). It was found during this study that a number of important reaction variables were very important for success, namely exclusion of light, temperature control, purity of starting material, solvent used and rate of bromine addition.