The use of isoxazoline and isoxazole scaffolding in the design of novel thiourea and amide liquid-crystalline compounds
| Autor: | Vera Lucia Eifler-Lima, Itamar Luís Gonçalves, Aloir A. Merlo, Rafaela R da Rosa |
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| Přispěvatelé: | DCM - Departamento de Ciência dos Materiais, CENIMAT-i3N - Centro de Investigação de Materiais (Lab. Associado I3N) |
| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
Full Research Paper
lcsh:QD241-441 Isoxazoline chemistry.chemical_compound lcsh:Organic chemistry Liquid crystal Isoxazole Amide Polymer chemistry liquid crystal isoxazoline lcsh:Science thiourea Organic Chemistry isoxazole Thiourea Mesophase Condensation reaction Amides amides Chemistry chemistry lcsh:Q Ammonium thiocyanate Potassium cyanate |
| Zdroj: | Beilstein Journal of Organic Chemistry Beilstein Journal of Organic Chemistry, Vol 16, Iss 1, Pp 175-184 (2020) Repositório Científico de Acesso Aberto de Portugal Repositório Científico de Acesso Aberto de Portugal (RCAAP) instacron:RCAAP |
| ISSN: | 1860-5397 |
| Popis: | The authors wish to thank the Coordenacao de Aperfeicoamento de Pessoal de Nivel Superior - Brasil (CAPES) - Finance Code 001 for the fellowships and Conselho Nacional de Pesquisa Cientifica (CNPq, edital Universal) for the financial support grant n. 403075 2016-5. A series of novel thiourea and amide liquid crystals containing 5-membered isoxazoline and isoxazole rings were synthetized and the liquid crystal properties studied. Thioureas were obtained using a condensation reaction of benzoyl chlorides, arylamines and ammonium thiocyanate. The amides, on the other hand, were the byproduct of a quantitative reaction which used potassium cyanate as the starting material. Thiourea and amide derivatives were predominantly SmA mesophase inductors. A nematic mesophase was observed only for thioureas and amides containing an isoxazole ring. Additionaly, the liquid crystal behavior was also dependent on the relative position of nitrogen and oxygen atoms on the 5-membered heterocycle. publishersversion published |
| Databáze: | OpenAIRE |
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