Compounds, liquid crystal composition and liquid crystal display

Abstract

The invention discloses compounds, liquid crystal composition and a liquid crystal display. The compounds are as shown in the formula I in the description. The liquid crystal composition contains at least one of the compounds. The liquid crystal display is made of the liquid crystal composition.

Description

technical field

[0001] The invention relates to the field of liquid crystal displays, in particular to a compound, a liquid crystal composition and a liquid crystal display. Background technique

[0002] Among flat panel display devices, Thin Film Transistor Liquid Crystal Display (TFT-LCD) has the characteristics of small size, low power consumption, relatively low manufacturing cost and no radiation, and occupies a dominant position in the current flat panel display market. status.

[0003] Liquid crystal displays have been widely used in various aspects of social life. Since the development of liquid crystal display technology, various liquid crystal compounds have been practically applied. Some general requirements for liquid crystal compounds, including phase transition temperature, optical anisotropy, dielectric anisotropy, viscosity, resistivity, etc. of liquid crystal compounds, all have a great impact on the final application of liquid crystal materials. It is ext...

Examples

Embodiment 1

[0063] The specific compound synthesized is shown in formula P1:

[0064]

[0065] The synthetic route of P1 is as follows:

[0066]

[0067] That is, the compound 3,4-dihydroxy-1-vinyl cyclopentane and propyl biscyclohexyl formaldehyde are reacted in toluene to obtain the compound shown in formula P1, and the specific steps are:

[0068] In a 250ml three-necked flask, add 12.8 grams of 3,4-dihydroxy-1-vinylcyclopentane (prepared with reference to Tetrahedron60 (2004) 8113 8130), 23.6 grams of propyl biscyclohexyl formaldehyde, 100 milliliters of toluene, heated to 80 degrees React for 4 hours, cool down, dry over magnesium sulfate, separate by silica gel column chromatography, recrystallize the obtained cis-trans mixed substance with a mixed solvent of ethanol and petroleum ether to obtain a trans product, 9.5 grams of the compound shown in formula P1, and obtain Yield 27.5%, product mass spectrum (m / e): 334, 1 HNMR (500MHz, CDCl3) δ5.84(m, 1H), δ5.01(m, 1H), δ4.94(m,...

Embodiment 2

[0070] The concrete compound of synthesis is shown in formula P3:

[0071]

[0072] The synthetic route of P3 is as follows:

[0073]

[0074] The synthetic method refers to P1, but propyl biscyclohexyl formaldehyde is replaced with propyl phenyl cyclohexyl formaldehyde to obtain 6.9 grams of compound shown in formula P3, product mass spectrum (m / e): 340, 1 HNMR (500MHz, CDCl 3 )δ7.20~7.0(m, 4H), δ5.90(m, 1H), δ5.01(m, 1H), δ4.93(m, 1H), δ4.72(d, 1H), δ4. 35(m, 2H), δ2.61(t, 2H), δ2.60~2.38(m, 2H), δ2.02(m, 1H), δ1.96~1.55(m, 8H), δ1.41 (m, 2H), δ 1.20 (m, 2H), δ 1.03 (m, 2H), δ 0.94 (t, 3H).

Embodiment 3

[0076] The concrete compound of synthesis is shown in formula P2:

[0077]

[0078] The synthetic route of P2 is as follows:

[0079]

[0080] That is, the compound 4-propyl-1,2-cyclopentanediol and vinyl biscyclohexyl formaldehyde are reacted in toluene to obtain the compound shown in formula P2, and the specific steps are:

[0081] In a 250ml three-necked flask, add 14.4 grams of 4-propyl-1,2-cyclopentanediol (prepared with reference to European Journal of Medicinal Chemistry 46 (2011) 1263-1273), 22.0 grams of vinyl biscyclohexyl formaldehyde (prepared with reference to EP1860089) , 100 milliliters of toluene, heated to 80 degrees and reacted for 4 hours, lowered the temperature, dried over magnesium sulfate, separated by silica gel column chromatography, and recrystallized the obtained cis-trans mixed substance with ethanol and sherwood oil mixed solvent to obtain the trans product, such as 6.1 grams of compound shown in formula P2, yield 17.6%, product mass spectru...

technical field

[0001] The invention relates to the field of liquid crystal displays, in particular to a compound, a liquid crystal composition and a liquid crystal display. Background technique

[0002] Among flat panel display devices, Thin Film Transistor Liquid Crystal Display (TFT-LCD) has the characteristics of small size, low power consumption, relatively low manufacturing cost and no radiation, and occupies a dominant position in the current flat panel display market. status.

[0003] Liquid crystal displays have been widely used in various aspects of social life. Since the development of liquid crystal display technology, various liquid crystal compounds have been practically applied. Some general requirements for liquid crystal compounds, including phase transition temperature, optical anisotropy, dielectric anisotropy, viscosity, resistivity, etc. of liquid crystal compounds, all have a great impact on the final application of liquid crystal materials. It is ext...

Examples

Embodiment 1

[0063] The specific compound synthesized is shown in formula P1:

[0064]

[0065] The synthetic route of P1 is as follows:

[0066]

[0067] That is, the compound 3,4-dihydroxy-1-vinyl cyclopentane and propyl biscyclohexyl formaldehyde are reacted in toluene to obtain the compound shown in formula P1, and the specific steps are:

[0068] In a 250ml three-necked flask, add 12.8 grams of 3,4-dihydroxy-1-vinylcyclopentane (prepared with reference to Tetrahedron60 (2004) 8113 8130), 23.6 grams of propyl biscyclohexyl formaldehyde, 100 milliliters of toluene, heated to 80 degrees React for 4 hours, cool down, dry over magnesium sulfate, separate by silica gel column chromatography, recrystallize the obtained cis-trans mixed substance with a mixed solvent of ethanol and petroleum ether to obtain a trans product, 9.5 grams of the compound shown in formula P1, and obtain Yield 27.5%, product mass spectrum (m / e): 334, 1 HNMR (500MHz, CDCl3) δ5.84(m, 1H), δ5.01(m, 1H), δ4.94(m,...

Embodiment 2

[0070] The concrete compound of synthesis is shown in formula P3:

[0071]

[0072] The synthetic route of P3 is as follows:

[0073]

[0074] The synthetic method refers to P1, but propyl biscyclohexyl formaldehyde is replaced with propyl phenyl cyclohexyl formaldehyde to obtain 6.9 grams of compound shown in formula P3, product mass spectrum (m / e): 340, 1 HNMR (500MHz, CDCl 3 )δ7.20~7.0(m, 4H), δ5.90(m, 1H), δ5.01(m, 1H), δ4.93(m, 1H), δ4.72(d, 1H), δ4. 35(m, 2H), δ2.61(t, 2H), δ2.60~2.38(m, 2H), δ2.02(m, 1H), δ1.96~1.55(m, 8H), δ1.41 (m, 2H), δ 1.20 (m, 2H), δ 1.03 (m, 2H), δ 0.94 (t, 3H).

Embodiment 3

[0076] The concrete compound of synthesis is shown in formula P2:

[0077]

[0078] The synthetic route of P2 is as follows:

[0079]

[0080] That is, the compound 4-propyl-1,2-cyclopentanediol and vinyl biscyclohexyl formaldehyde are reacted in toluene to obtain the compound shown in formula P2, and the specific steps are:

[0081] In a 250ml three-necked flask, add 14.4 grams of 4-propyl-1,2-cyclopentanediol (prepared with reference to European Journal of Medicinal Chemistry 46 (2011) 1263-1273), 22.0 grams of vinyl biscyclohexyl formaldehyde (prepared with reference to EP1860089) , 100 milliliters of toluene, heated to 80 degrees and reacted for 4 hours, lowered the temperature, dried over magnesium sulfate, separated by silica gel column chromatography, and recrystallized the obtained cis-trans mixed substance with ethanol and sherwood oil mixed solvent to obtain the trans product, such as 6.1 grams of compound shown in formula P2, yield 17.6%, product mass spectru...

Images