JPS5762242A - Preparation of diester-type liquid crystal - Google Patents

Preparation of diester-type liquid crystal

Info

Publication number
JPS5762242A
JPS5762242A JP55135857A JP13585780A JPS5762242A JP S5762242 A JPS5762242 A JP S5762242A JP 55135857 A JP55135857 A JP 55135857A JP 13585780 A JP13585780 A JP 13585780A JP S5762242 A JPS5762242 A JP S5762242A
Authority
JP
Japan
Prior art keywords
group
liquid crystal
phenyl
alkyl
formula
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP55135857A
Other languages
Japanese (ja)
Inventor
Noboru Itsukida
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hitachi Ltd
Original Assignee
Hitachi Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP55135857A priority Critical patent/JPS5762242A/en
Publication of JPS5762242A publication Critical patent/JPS5762242A/en
Pending legal-status Critical Current

Links

Classifications

    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P20/00—Technologies relating to chemical industry
    • Y02P20/50—Improvements relating to the production of bulk chemicals
    • Y02P20/55—Design of synthesis routes, e.g. reducing the use of auxiliary or protecting groups

Landscapes

  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
  • Liquid Crystal Substances (AREA)

Abstract

PURPOSE: To prepare the titled liquid crystal, in high yield, with simplified process, preventing the formation of impurities by side reactions, by protecting the phenolic hydroxyl group of 4-hydroxybenzoic acid with silyl group, removing the protecting group after esterification, and again esterifying the product.
CONSTITUTION: 4-Hydroxybenzoic acid is reacted with the compound of formula I(R1 and R3 are CH3 or C2H5 and R2 is 4-alkyl-phenyl; or R1 and R2 are 4-alkyl- phenyl and R3 is CH3 or C2H5; or R1WR3 are 4-alkyl-phenyl) to protect the phenolic hydroxyl group, and then subjected to the first-stage esterification reaction. Then the protecting group is removed, and the product is subjected to the second-stage esterification reaction to obtain the objective compound of formula II[R4 and R5 are group of formula IIIWVI (l, m, n, and p are integers 1W10)].
COPYRIGHT: (C)1982,JPO&Japio
JP55135857A 1980-10-01 1980-10-01 Preparation of diester-type liquid crystal Pending JPS5762242A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP55135857A JPS5762242A (en) 1980-10-01 1980-10-01 Preparation of diester-type liquid crystal

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP55135857A JPS5762242A (en) 1980-10-01 1980-10-01 Preparation of diester-type liquid crystal

Publications (1)

Publication Number Publication Date
JPS5762242A true JPS5762242A (en) 1982-04-15

Family

ID=15161389

Family Applications (1)

Application Number Title Priority Date Filing Date
JP55135857A Pending JPS5762242A (en) 1980-10-01 1980-10-01 Preparation of diester-type liquid crystal

Country Status (1)

Country Link
JP (1) JPS5762242A (en)

Similar Documents

Publication Publication Date Title
EP0330220A3 (en) Process for the preparation and recovery of oxydiphthalic anhydrides
ES8404999A1 (en) Process for preparing L-ascorbic acid.
JPS57131735A (en) Preparation of quinones
JPS5762242A (en) Preparation of diester-type liquid crystal
DE3779873D1 (en) METHOD FOR PRODUCING MIXTURES FROM MONO AND OLIGOMER CARBOHYDRATE ESTERS, THE CARBOHYDRATE ESTER MIXTURES AVAILABLE IN THIS, AND THEIR USE.
JPS5513245A (en) Preparation of m-aminoacetanilide
JPS5490133A (en) Preparation of ester
JPS5699480A (en) Preparation of pyridopyrimidine derivative
JPS55167012A (en) Antifoaming agent
JPS56120642A (en) Preparation of aryl ester of aromatic oxycarboxylic acid
JPS5692238A (en) Separation and recovery of hydroquinone derivative
JPS53135962A (en) Preparation of 1-amino-2-bromo-4-hydroxyanthraquinone
JPS572241A (en) Preparation of diester type liquid crystal
JPS57149283A (en) Long-chain fatty acid lactol
JPS5569535A (en) Preparation of dihydro-coenzyme q analog compound
JPS5557566A (en) N-methyl-8-chloro-3,4-dihydro-2-quinolinone, its preparation, and germicide containing the same
JPS55318A (en) Purification of 2,3-epoxy-2,3-dihydro-1,4-naphthoquinone
JPS5266684A (en) Purification and separation of 2-keto-l-glonic acid
JPS5524156A (en) Novel cyclohexylacetic acid derivative
JPS5461134A (en) Preparation of n,n'''-di-alpha-phenoxypropionylisophthalic acid dihydrazide
JPS5257135A (en) Esterification process
JPS56123927A (en) Preparation of hydroquinone and quinone derivative
JPS56169658A (en) Preparation of propionate betaine crystal
JPS55157530A (en) Preparation of 3-fluoro-4-phenylbenzaldehyde
JPS5271500A (en) Purification of colesterol