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Title:
TRIFLUORO-2-(TRANS-4-SUBSTITUTED CYCLOHEXYL)ETHYLENE AND ITS PRODUCTION
Document Type and Number:
Japanese Patent JPH0812604
Kind Code:
A
Abstract:

PURPOSE: To produce a new intermediate useful for synthesizing a liquid crystal compound, especially a liquid crystal compound useful for STN in a very high yield by very ready operations.

CONSTITUTION: This compound is expressed by the formula [R is a 1 to 10C alkyl, a halogen or CN. in the case of an alkyl, 0 may be inserted in the alkyl or in the C-C bond between the alkyl and A or a part of C-C bonds may be replaced with triple bonds or double bonds. one CH2 in the alkyl may be replaced with CO or a part or the whole of H may be replaced with F; Cy is a non-substituted trans-1,4-cyclohexylene; A is trans-1,4-cyclohexyne, 1,4- phenylene or 1,4-cyclohexenylene which may be respectively substituted with a halogen or CN; (m) is 0 or 1], e.g. 2-(trans-4-n-propylcyclohexyl)-1,1,2-trifluoro- ethylene. This compound is synthesized by fluorinating a compound of formula II and conducting dehydrofluorination of the resultant compound of formula III.


Inventors:
YOKOKOJI OSAMU
SHIMIZU TAMAKI
KUMAI SEISAKU
Application Number:
JP1994000143480
Publication Date:
January 16, 1996
Filing Date:
June 24, 1994
Export Citation:
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Assignee:
ASAHI GLASS CO LTD
International Classes:
C07D239/26; C07C17/04; C07C17/25; C07C17/26; C07C22/00; C07C22/02; C07C22/08; C07C23/10; C07C25/18; C07C25/24; C07C41/24; C07C43/176; C07C43/192; C07C43/225; C07C45/30; C07C45/65; C07C49/567; C07C49/813; C07C253/30; C07C255/46; C07C255/50; C07D211/14; C07D211/36; C07D319/06; C07D339/06; C09K19/04; C09K19/30; C09K19/34; (IPC1-7): C07C22/00; C07C17/25; C07C22/02; C07C22/08; C07C25/18; C07C41/24; C07C43/176; C07C43/192; C07C43/225; C07C45/65; C07C49/567; C07C49/813; C07C253/30; C07C255/46; C07C255/50; C07D211/14; C07D211/36; C07D239/26; C07D319/06; C07D339/06
Attorney, Agent or Firm:
泉名 謙治