LIQUID-CRYSTAL COPOLYMER, PRODUCTION THEREOF, DIENE COMPOUND USED IN SAID PRODUCTION, AND PRODUCTION OF SAID COMPOUND
申请人:IDEMITSU KOSAN COMPANY LIMITED
公开号:EP0493601A1
公开(公告)日:1992-07-08
A liquid-crystal copolymer developing ferro-electricity near room temperature and rapidly responding to a change in outer electric field, which comprises repeating units of general formulae (I) and (II) in a molar ratio of around 1:1, wherein r and p each represents an integer of 2 to 5; q represents an integer of 0 to 3; m represents an integer of 1 to 20; R¹ represents (a); R² represents -COOR³, -OR³ or -OCOR³; R³ represents (b); R⁴ and R⁵ each represents - CH₃ or halogen; a and d each represents an integer of 0 to 10; and b is 0 or 1, provided that d is not 0 when R⁵ represents - CH₃.
Reactions of aliphatic and aromatic aldehydes with the 2,4,4,6-tetrahromo-2,5-cyclohexadienone-triphenylphosphine complex result in formation of the corresponding geminal dibromides. Ketones react with the same complex to give vinyl bromides.