Process for the production of intermediate for liquid crystal co

Details Process for the production of intermediate for liquid crystal co Process for the production of intermediate for liquid crystal co

1997-10-31

1999-08-17

Killos, Paul J.

Organic compounds -- part of the class 532-570 series

Organic compounds

Carboxylic halides

560 66, C07C 5158, C07C 6976

Patent

active

059395869

ABSTRACT:
A process for the production of an intermediate for a liquid crystal compound, which comprises reacting an alkyloxybiphenylcarboxylic acid with purified thionyl chloride substantially free of sulfuryl chloride, the thionyl chloride being obtained by adding phenol, etc., to thionyl chloride, heating the mixture and distilling the resultant mixture; and a process for the production of a liquid crystal compound from the above intermediate. According to the present invention, thionyl chloride can be easily purified, and a liquid crystal compound having a very high purity can be obtained by the use of the purified thionyl chloride.

REFERENCES:
patent: 2529671 (1950-11-01), Bissinger
patent: 5374375 (1994-12-01), Yui et al.
patent: 5378396 (1995-01-01), Yui et al.
CA 106:94104 (1986).

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