Compounds having liquid crystal properties with a tropolone core were synthesized: A series of 5-alkoxy-2-benzoyloxytropones showed the mesophase(s), whereas corresponding 5-alkoxy-2-benzyloxytropones did not. A [1,9] sigmatropy seems to play an important role to this mesomorphic behavior.
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Mori et al. (1989) studied this question.
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