Dihydrocoumarin derivative, liquid crystal composition containing the same, and liquid crystal display device
                        
                            
                                申请人:Fujita Atsuko
                            
                            
                                公开号:US20060131541A1
                            
                            
                                公开(公告)日:2006-06-22
                            
                            A dihydrocoumarin ring-containing compound of the invention is represented by the following formula (1):
wherein R represents hydrogen or an alkyl; A
1
to A
3
each represents 1,4-cyclohexylene or 1,4-phenylene; Z
1
to Z
3
each represents a single bond, —(CH
2
)
2
—, —CH
2
O—, —OCH
2
—, —CF
2
O—, —OCF
2
—, —CH═CH—, —CF═CF—, —C≡C—, —(CH
2
)
4
—, —O(CH
2
)
2
O—, —(CH
2
)
2
CF
2
O—, —(CH
2
)
2
OCF
2
—, —CF
2
O(CH
2
)
2
—, —OCF
2
(CH
2
)
2
—, —CH═CH—CH
2
O—, or —OCH
2
—CH═CH—; X represents hydrogen, fluorine, chlorine, —CN, —CF
3
, —CHF
2
, —CH
2
F, —OCF
3
, —OCHF
2
, or —OCH
2
F; G represents oxygen or sulfur; and n and m each represents 0, 1, or 2.
                            发明中包含二氢
香豆素环的化合物由以下式(1)表示:其中R代表氢或烷基;A1到A3分别代表1,4-
环己烯基或1,4-苯基;Z1到Z3分别代表单键,—(
CH2)2—,—   O—,—O   —,—
CF2O—,—O
CF2—,—CH═CH—,—CF═CF—,—C≡C—,—(   )4—,—O(   )2O—,—(   )2
CF2O—,—(   )2O
CF2—,—
CF2O(   )2—,—O
CF2(   )2—,—CH═CH—   O—,或—O   —CH═CH—;X代表氢,
氟,
氯,—CN,—
CF3,—
CHF2,—   F,—O   ,—O    ,或—O   F;G代表氧或
硫;n和m分别代表0、1或2。