Journal
TETRAHEDRON
Volume 64, Issue 20, Pages 4619-4626Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.tet.2008.03.005
Keywords
liquid crystal; N-heterotolan; phenylpyridyl framework; Buchwald protocol; Sonogashira coupling
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A homologous series of the new N-heterotolans 8a-d were synthesized using two cross-coupling reactions mediated by copper and palladium/copper. The final compounds present the phenyl-pyridyl framework connected by the acetylene group. The evaluation of thermal properties for this series is described. All compounds exhibit the smectic A and X mesophase. For comparison were also synthesized compounds 10, 12, and 14. Their LC properties are reported. (C) 2008 Elsevier Ltd. All rights reserved.
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