| 摘要 |
New pleochroic anthraquinones, suitable for use in colored liquid crystal displays based upon the guest-host effect, of the formula: <IMAGE> I wherein R & R1, each independently, represents C4-7-n-alkyl; and R2 & R3, each independently, represents H or C1-4-alkyl. The invention also concerns processes for the preparation of the pleochroic compounds and some intermediate compounds. |
