EP0224725A1
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Optically active benzoic ester derivatives
Assignee: DIC Corp
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Filing: 1986-10-31
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Granted: —
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Expires: 2006-10-31
Abstract
Abstract An optically active benzoic ester derivative represented by the general formula: wherein R represents a straight chain alkyl group having from 1 to 20 carbon atoms; R' represents a straight chain alkyl group having from 2 to 8 carbon atoms; rings A and B each represents or a trans-1,4-cyclohexane ring; n represents 0 or 1; and C represents an asymmetric carbon atoms. The compounds of formula (I) are capable of providing a chiral nematic liquid crystal composition having a short spiral pitch when added to a nomatic liquid crystal composition in a small amount and are useful in the production of SBE display devices having excellent performances in a high level multiplexing driving system.
Inventors
- 👤 Makoto Sasaki
- 👤 Kiyohumi Takeuchi
- 👤 Haruyoshi Takatsu
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-05 08:41
CPC Classifications
C; C07; C07D; C07D239/00; C07D239/02; C07D239/24; C07D239/26; C09; C09K; C09K19/00; C09K19/04; C09K19/06; C09K19/08; C09K19/30; C09K19/3001; C09K19/3003; C09K19/3059; C09K19/34; C09K19/3441; C09K19/345; C09K19/3458; C09K19/3463
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
61 words
An optically active benzoic ester derivative represented by the general formula: wherein R represents a straight chain alkyl group having from 1 to 20 carbon atoms; R' represents a straight chain alkyl group having from 2 to 8 carbon atoms; rings A and B each represents or a trans-1,4-cyclohexane ring; n represents 0 or 1; and represents an asymmetric carbon atom.
Claim 2
Dependent Claim
61 words
An optically active benzoic ester derivative represented by the general formula: wherein R represents a straight chain alkyl group having from 1 to 20 carbon atoms; R' represents a straight chain alkyl group having from 2 to 8 carbon atoms; rings A and B each represents or a trans-1,4-cyclohexane ring; n represents 0 or 1; and represents an asymmetric carbon atom.
Claim 3
Dependent Claim
34 words
An optically active benzoic ester derivative of claim 1, wherein R is n-C 5 H 11 -, ring A is ring B is R' is n-C 6 H, 3- , and n is 0.
Claim 4
Dependent Claim
34 words
An optically active benzoic ester derivative of claim 1, wherein R is n-C 3 -H 7 -, ring A is ring B is R' is n-C 6 H 13 -, and n is 1.
Claim 5
Dependent Claim
34 words
An optically active benzoic ester derivative of claim 1, wherein R is n-C 5 -H 11 -, ring A is ring B is R' is n-C 6 H 13 -, and n is 0.
Claim 6
Dependent Claim
34 words
An optically active benzoic ester derivative of claim 1, wherein R is n-C 4 H 9 -, ring A is ring B is R' is n-C 6 H 13 -, and n is 0.
Claim 7
Dependent Claim
112 words
A process for preparing a benzoic ester derivative of the general formula (I): wherein R represents a straight chain alkyl group having from 1 to 20 carbon atoms; R' represents a straight chain alkyl group having from 2 to 8 carbon atoms; rings A and B each represents or a trans-1,4-cyclohexane ring; n represents 0 or 1; and C represents an asymmetric carbon atom which comprises reacting a compound of the general formula (II): with a halogenating agent to obtain a compound of the general formula (III): wherein X represents a halogen atom, reacting the compound of the general formula (III) with an optically active alcohol of the general formula - (IV):
Claim 8
Dependent Claim
112 words
A process for preparing a benzoic ester derivative of the general formula (I): wherein R represents a straight chain alkyl group having from 1 to 20 carbon atoms; R' represents a straight chain alkyl group having from 2 to 8 carbon atoms; rings A and B each represents or a trans-1,4-cyclohexane ring; n represents 0 or 1; and C represents an asymmetric carbon atom which comprises reacting a compound of the general formula (II): with a halogenating agent to obtain a compound of the general formula (III): wherein X represents a halogen atom, reacting the compound of the general formula (III) with an optically active alcohol of the general formula - (IV):
Claim 9
Dependent Claim
4 words
in a basic solvent.
Claim 10
Dependent Claim
4 words
in a basic solvent.
Claim 11
Dependent Claim
26 words
A process for preparing a benzoic ester derivative of Claim 6, wherein a halogenating agent is a thionyl chloride, and a basic solvent is a pyridine.
Claim 12
Dependent Claim
30 words
A process for preparing a benzoic ester derivative of Claim 6, wherein the process further comprises purifying the reaction mixture of the compound (III) with the optically active alcohol (IV).
References Cited (Backward Citations)
EP0110299A2
Cited
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