Title:
PRODUCTION OF TOLAN COMPOUND
Document Type and Number:
Japanese Patent JP3646734
Kind Code:
B2
Abstract:
PURPOSE: To industrially and advantageously obtain a liquid crystal compound, useful as a blending component of a liquid crystal composition and excellent in anisotropy of refractive index by reacting a specific ethynylbenzene derivative with a specified aromatic halogen compound in the presence of a metallic catalyst and a basic substance.
CONSTITUTION: This method for producing a tolan compound of formula III [X1 to X4 are each CH, CF, etc.; A is H, F, etc.; Y1 to Y4 are each X1; R is a 1-12C alkyl, a 2-12C alkenyl, etc.] is to react an ethynylbenzene derivative of formula I with an aromatic halogen compound of formula II [D is a halogen or SOR' (R' is a lower alkyl or phenyl)] in the presence of a metallic catalyst (e.g. palladium acetate) and a basic substance (preferably a secondary or a tertiary amine such as diethylamine). For example, 1-(4-propylphenyl)-2-(4-(1- trans-pentenyl)phenyl)acetylene is obtained by using 4-propylphenylacetylene as the compound of formula I and 4-(1-trans-pentenyl)-bromobenzene as the compound of formula II.
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Inventors:
Yukari Fujimoto
Tsutomu Matsumoto
Takayuki Higashii
Masayoshi Minami
Tsutomu Matsumoto
Takayuki Higashii
Masayoshi Minami
Application Number:
JP23677794A
Publication Date:
May 11, 2005
Filing Date:
September 30, 1994
Export Citation:
Assignee:
Merck Patent Gesellschaft mit beschraenkter Haftung
International Classes:
G02F1/13; B01J31/24; C07B61/00; C07C2/86; C07C13/28; C07C15/54; C07C17/263; C07C22/08; C07C25/24; C07C41/30; C07C43/176; C07C43/225; C07C43/30; C07C253/30; C07C255/50; C07D237/08; C07D239/26; C07D241/12; C07D401/06; C09K19/18; C09K19/30; C09K19/34; (IPC1-7): C07C2/86; C07C13/28; C07C15/54; C07C17/263; C07C22/08; C07C25/24; C07C41/30; C07C43/225; C07C253/30; C07C255/50; C07D237/08; C07D239/26; C07D241/12
Domestic Patent References:
| JP3058944A |
Attorney, Agent or Firm:
Kiyoji Kuzuwa