Fluorovinylic compounds were synthesized by a one-pot procedure from the corresponding alkynyliodonium salts and alkalimetalfluorides. Different reaction parameters, such as the temperature, the solvent and the reaction time were examined, and interestingly CsF was chosen for regio- and stereo-selective reactions leading to different alkenyliodonium salts in good yields. Their reduction using NaBH4
FLUORINE-CONTAINING LIQUID CRYSTAL COMPOUND, LIQUID CRYSTAL COMPOSITION, AND LIQUID CRYSTAL ELECTRO-OPTIC ELEMENT
申请人:Yaguchi Tomoko
公开号:US20110268894A1
公开(公告)日:2011-11-03
A liquid crystal compound, a liquid crystal composition, and a liquid crystal electric optical device having a low rotational viscosity (γ1) and appropriate elastic constants. A fluorine-containing liquid crystal compound represented by formula (1). R
1
-(A
1
-Z
1
)a-(A
2
-Z
2
)b-(A
3
-Z
3
)c-A
4
-(CH
2
)n-CF═CF—R
2
(1), R
1
is a hydrogen atom, a halogen atom, or an alkyl group, R
2
is a halogen atom or an alkyl group that may be halogen-substituted or which may include a (thio)ether group, A
1
to A
4
may be a phenylene group or a cyclohexylene group that may be halogen-substituted or which may include a (thio)ether group, Z
1
to Z
3
are a single bond, —O—, —S—, or a divalent aliphatic hydrocarbon group that may be halogen-substituted or which may include a (thio)ether group. n is an integer from 0 to 3, and a, b, and c are 0 or 1, provided that a+b+c is 1 or greater.