| abstract |
The invention discloses a preparation method of a cyclohexyl polyfluorobenzene liquid crystal monomer. The liquid crystal monomer is a liquid crystal monomer A with a specific general formula. The preparation method specifically includes: preparing a Grignard reagent, a lattice reaction, and a dehydration reaction And the step of hydrogenation reaction. By adding a secondary catalyst and using a special hydrogenation catalyst in the preparation process of the Grignard reagent, the invention reduces the basicity of the Grignard reagent, improves the conversion rate of the trans structure, simplifies the production process, reduces the production cost, and improves the Product yield and product quality. |