| abstract |
NEW MATERIAL:A compound of formula I [m is 1W8; Z is formula II (l, k are 1, 2 where l+k=2, 3; X is single bond, COO, OOC, CH 2 O; Y is COO, O; A 1 , A 2 are H, F, Cl), formula III; R is C n H 2n+1 , OC n H 2n+1 , C(=O)OC n H 2n+1 (n is 1W18); * is an asymmetric carbon]. n EXAMPLE: (2R,5S)-2-[(4'-decyloxybiphenyl)-4-carbonyloxy]-5-hexyl-δ-valerolactone. n USE: A formulation component for ferroelectric liquid crystal. Being chemically stable, free from discoloration, having optically excellent stability with a large spontaneous polarization. n PREPARATION: For example, the reaction of a compound of formula IV with a compound of formula V gives a compound of formula I where Z is formula II (Y is COO; X is single bond). The compound of formula V is obtained by Kolbe electrolytic reaction of an optically active α-acetoxycarboxylic acid with a monoester of an optically active β-acetoxy-dibasic acid, then cyclization. n COPYRIGHT: (C)1989,JPO&Japio |