| 摘要 |
PROBLEM TO BE SOLVED: To obtain a new compound of an oligomer obtained by connecting norbornadiene molecules with aπconjugation system, capable of sufficiently absorbing a wide range of a visual light region, good in durability for repeated structural change, and useful as a material for an optical device. SOLUTION: The new compound is a norbornadienyl derivative of formula I [R1 and R2 are each a 1-4C alkyl; R3 and R4 are each H or a 1-4C alkyl; A1 and A2 are each an electron attractive substituent (e.g. perfluoroalkyl); Ar1 and Ar2 are each an aromatic group or a heteroaromatic group; (l) is 2-5; (m) and (n) are each 1-5]. The compound of formula I is preferably obtained by reacting a cyclopentadiene derivative of formula II with an alkyne compound of formula III in the presence of a solvent. The compound of formula II is preferably obtained by coupling a compound of formula IV with an organometallic compound prepared from the compound of formula IV in the presence of a metal complex.
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