Dihydrocoumarin derivative, liquid crystal composition...

Details Dihydrocoumarin derivative, liquid crystal composition... Dihydrocoumarin derivative, liquid crystal composition...

2005-12-16

2008-10-14

Wu, Shean C (Department: 1795)

Stock material or miscellaneous articles

Liquid crystal optical display having layer of specified...

C252S299010, C252S299610, C252S299620, C252S299660, C252S299670, C549S023000, C549S283000, C549S289000, C549S290000

Reexamination Certificate

active

07435455

ABSTRACT:
A dihydrocoumarin ring-containing compound of the invention is represented by the following formula (1):wherein R represents hydrogen or an alkyl; A1to A3each represents 1,4-cyclohexylene or 1,4-phenylene; Z1to Z3each represents a single bond, —(CH2)2—, —CH2O—, —OCH2—, —CF2O—, —OCF2—, —CH═CH—, —CF═CF—, —C≡C—, —(CH2)4—, —O(CH2)2O—, —(CH2)2CF2O—, —(CH2)2OCF2—, —CF2O(CH2)2—, —OCF2(CH2)2—, —CH═CH—CH2O—, or —OCH2—CH═CH—; X represents hydrogen, fluorine, chlorine, —CN, —CF3, —CHF2, —CH2F, —OCF3, —OCHF2, or —OCH2F; G represents oxygen or sulfur; and n and m each represents 0, 1, or 2.

REFERENCES:
CA: 147: 529080, 2007.
M.A. Sayed et al., “Action of Nitrogen and Carbon Nucleophiles on 6-Phenyl-3, 4-Dihydrocoumarin”, Oriental Journal of Chemistry, vol. 3, No. 2, 1987, pp. 174-178.
Stephen G. Davies et al., “Synthesis of 6-substituted-3,4-dihydro-2H-1-benzopyran-2-ones(dihydrocoumarins) via palladium catalysed coupling reactions”, Journal of Organometallic Chemistry, 387(3), 1990, pp. 381-390.

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