3AD09 強誘電性液晶ドーパント、光学活性2,4二置換-γ-ブチロラクトンの合成と物性

概要

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The syntheses and ferroelectric liquid crystal (FLC) properties of optically active 2,4-disubstituted γ-butyrolactones, cis-1-4 and trans-1-4, with a different number of methylene group between the core part and the chiral lactone part will be described. The present syntheses are characterized by a highly regioselective C-C double bond isomerization from exo to endo effected by Pd-C to give endo-5-8, from which both cis and trans isomers were prepared in a stereoselective manner. Both cis-1-4 and endo-5-8 showed larger spontaneous polarizations (Ps's) and higher speed responses on the cases of having an even number (n = 0, 2) of methylene group than those of the odd cases (n = 1, ,3). On the other hand, trans-4(n = 3) showed a large Ps and a high speed response.
日本液晶学会の論文
1997-09-24