抄録
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.
