KR880003894A - Optically Active Compounds and Liquid Crystal Compositions - Google Patents

Abstract

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Description

Optically Active Compounds and Liquid Crystal Compositions

Since this is an open matter, no full text was included.

1 is an IR spectrum of the optically active cyclopropane compound obtained in Example 1.

Figure 2 shows 4'-octylcarbonyloxy-4- (1S-2.2-dimethylcyclo-propanemethyloxycarbonyl) biphenyl and 4'-heptylcarbonyloxy-4- (1S-chloro-2-methylbutylcarbon Phase diagram of a composition containing nyloxy) biphenyl.

Claims (11)

Optically active cyclopropane compound of the following general formula (1). Wherein R is a straight or branched chain alkyl group having 4 to 18 carbon atoms or a cycloalkyl group having 4 to 18 carbon atoms, n is 0 or 1, and Y ⁴ is -CO ₂ CH _2- , -OCO- or -OCH _2- Y ¹ .Y ² and Y ³ are independently -CO ₂ -.- OCO -.- O-, a direct bond or -CH ₂ 0-, and Z ¹ .Z ² and Z ³ are independently And at least two of the groups optionally selected as Z ¹ .Z ² and Z ³ may be the same or different, and A ₁ A ₂ and A ₃ are independently a fluorine atom, bromine atom, chlorine atom, cyano group or A hydrogen atom, and C represents an asymmetric carbon atom. 2. The compound of claim 1, wherein R is a straight or branched chain alkyl group having 4 to 18 carbon atoms or a cycloalkyl group having 4 to 18 carbon atoms, n is 0, Y ¹ is —CO ₂ —, Y ² is a direct bond, An optically active cyclopropane compound wherein Z ¹ and Z ² are 1.4-phenylene groups and Y ⁴ is —CO ₂ CH ₂ —. The compound of claim 1, wherein R is a straight or branched chain alkyl group having 4 to 18 carbon atoms or a cycloalkyl group having 4 to 18 carbon atoms, n is 0, Y ¹ is 0-, Y ² is a direct bond, and Z is Optically active cyclopropane compound in which ¹ and Z ² represent a 1.4-phenylene group and Y ⁴ represents —OCO—. 2. The compound of claim 1, wherein R is a straight or branched chain alkyl group having 4 to 18 carbon atoms or a cycloalkyl group having 4 to 18 carbon atoms, n is 0, Y ¹ is —COO—, Y ² is a double bond, Z Optically active cyclopropane compound in which ¹ and Z ² represent a 1.4-petylene group and Y ⁴ represents —OCO—. ^2. The compound of claim 1, wherein R is a straight or branched chain alkyl group having 4 to 18 carbon atoms or a cycloalkyl group having 4 to 18 carbon atoms, n is 0, Y ¹ is -OCOO-, Y ² is a direct bond, and Z is Optically active cyclopropane compound wherein ¹ and Z ² are 1.4-phenylene groups and Y ⁴ is —OCO—. ^2. The compound of claim 1, wherein R is a straight or branched chain alkyl group having 4 to 18 carbon atoms or a cycloalkyl group having 4 to 18 carbon atoms, n is 0, Y ¹ is —O—, Y ^{2 is a} direct bond, and Z ¹ This is a 1.4-phenylene group, Z <^2> is a pyrimidine- ^2.5 -diyl group, and Y <^4> is -OCO-, The optically active cyclopropane compound. 2. The compound of claim 1, wherein R is a straight or branched chain alkyl group having 4 to 18 carbon atoms or a cycloalkyl group having 4 to 18 carbon atoms, n is 0, Y ¹ is a direct bond, Y ² is a direct bond, and Z ¹ The optically active cyclopropane compound which is this pyramimid- ^2.5 -diyl group, Z <^2> is 1.4-phenylene group, and Y <^4> -OCO-. Liquid crystal composition containing at least one optically active cyclopropane compound of the following general formula (1). Wherein R is a straight or branched chain alkyl group having 4 to 18 carbon atoms or a cycloalkyl group having 4 to 18 carbon atoms, n is 0 or 1, and Y ⁴ is -CO ₂ CH _2- , -OCO- or -OCH _2- Y 1, Y ² and Y ³ are independently —CO ₂ —, — OCO —, — O—, a direct bond or —CH ₂ O—, and Z ¹ , Z ² and Z ³ are independently And at least two of the groups optionally selected as Z ¹ , Z ² and Z ³ may be the same or different and A. A ₂ and A ₃ are independently a fluorine atom, bromine atom, chlorine atom, cyano group or hydrogen An atom, and C represents an asymmetric carbon atom. A liquid crystal composition having dielectric properties containing at least one optically active cyclopropane compound of the general formula (1) and a liquid crystal compound having a cholesteric helical pitch opposite to the compound. Wherein R is a straight or branched chain alkyl group having 4 to 18 carbon atoms or a cycloalkyl group having 4 to 18 carbon atoms, n is 0 or 1, and Y ⁴ is -CO ₂ CH _2- , -OCO- or -OCH _2- And Y ¹ , Y ² and Y ³ are independently —CO ₂ —, — OCO —, — O—, a direct bond or —CH ₂ O—, and Z ¹ , Z ² and Z ³ are independently And at least two of the groups optionally selected as Z ¹ , Z ² and Z ³ may be the same or different and A ₁ and A ₂ and A ₃ are independently a fluorine atom, bromine atom, chlorine atom, cyano group or hydrogen An atom, and C represents an asymmetric carbon atom. 10. The liquid crystal composition according to claim 9, having a helical pitch of at least 5 mu m. 10. The liquid crystal composition according to claim 9, further containing at least one smectic C liquid crystal compound having no optical activity and having a spiral pitch of at least 5 μm. ※ Note: The disclosure is based on the initial application.