Optically polymerizable optically active liquid crystal monomer
A technology of liquid crystal monomer and polymerization type, which is applied in the direction of liquid crystal materials, chemical instruments and methods, etc., can solve the problems of poor liquid crystal compatibility and lack of liquid crystal equivalence, and achieve the best mutual compatibility effect
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[0035] Propose the preparation method of described liquid crystal monomer according to above-mentioned synthetic route, its step is:
[0036] 1) Preparation of 6-bromohexan 1-ol:
[0037] Put 20g of hexane-1,6-diol and 48% hydrogen bromide into a 500mL reaction flask, add 200mL of solvent toluene, heat up to 80°C, stir and reflux for 24 hours, cool to room temperature, and remove the solvent by vacuum rotary concentration , add anhydrous magnesium sulfate to remove water, and use column separation to obtain 22.85 g of 6-bromohexan 1-alcohol, with a yield of 75%;
[0038] 2) Preparation of methyl 4'-hydroxy-[1,1'-biphenyl]-4-carboxylate:
[0039] Dissolve 5 g of 4'-hydroxy-[1,1'-biphenyl]-4-carboxylic acid in 50 mL of methanol, add 2 mL of 98% sulfuric acid and 10 mL of toluene, heat up and reflux for 12 hours, cool to room temperature, add water and ethyl acetate Extraction, adding anhydrous magnesium sulfate to remove water, using column separation to obtain 5.22 g of methy...
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