Process for the production of intermediate for liquid crystal compound

摘要

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.