| 摘要 |
PROBLEM TO BE SOLVED: To provide a new polymerizable compound having tolan skeleton, high birefringence, low crystal-nematic liquid crystal transition temperature and excellent compatibility with other liquid crystals and useful for a phase- difference film, etc. SOLUTION: The objective compound is expressed by formula I (Xa, xb and Xc are each F, Cl or methyl; (l), (m) and (n) are each 0-4; (q) and (t) are each 1-20, R1 and R2 are each a 1-18C bivalent hydrocarbon group; Y1 and y2 are each a linking group selected from single bond, O and S; Q1 and Q2 are each acryloyloxy, methacryloyloxy, acrylamido or the like), e.g. the compound of formula II. The compound can be produced by coupling a compound of formula III with a compound of formula IV (Z1 is Br or I) and converting the reactive functional group at the spacer terminal of the obtained synthetic intermediate into a polymerizable functional group.
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