CN1312107C - 3,4-difluoro-2-methoxy phenol ester derivative and its preparing method and use - Google Patents
3,4-difluoro-2-methoxy phenol ester derivative and its preparing method and use Download PDFInfo
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- CN1312107C CN1312107C CNB2005100770553A CN200510077055A CN1312107C CN 1312107 C CN1312107 C CN 1312107C CN B2005100770553 A CNB2005100770553 A CN B2005100770553A CN 200510077055 A CN200510077055 A CN 200510077055A CN 1312107 C CN1312107 C CN 1312107C
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Abstract
The present invention discloses a derivative of 3, 4-difluoro-2-methoxyphenol ester, and a preparation method and an application thereof. The derivative of the 3, 4-difluoro-2-methoxyphenol ester has the structural formula as the formula I, wherein R is an alkyl group with the carbon number of 1 to 15, a and B are the formula (A), m and n are 0 or 1, and m and n are not 0 simultaneously. Methoxyl groups are arranged on the lateral directions of the benzene ring of 3, 4-difluorophenol, because the methoxyl groups have small space volume and small electric dipole moment, and average dipole directions in the long axis directions of molecules, the dielectric anisotropy of the molecules of a compound in the long axis directions of the molecules can be increased, and the melting point of the compound can be reduced. The present invention has the advantage of simple preparation method of the compound. The derivative of the present invention has a wide application prospect in the technical field of liquid crystal display, particularly the liquid crystal display with wide temperature ranges and low threshold.
Description
Technical field
The present invention relates to compound and synthetic method thereof and application, particularly relate to 3,4-difluoro-2-methoxy phenol ester derivative and preparation method thereof, and this compound is in Application in LCD.
Background technology
Twisted nematic (Twisted Nematic:TN) pattern that people such as M.Schadt in 1971 deliver is the pattern that obtains widespread use in the liquid-crystal display the earliest, is also dominating Die elektrische Zeituhr, counter and various rudimentary fields such as small-sized matrix demonstration so far.Supertwist nematic phase (the Super Twisted Nematic:STN) pattern of inventions such as nineteen eighty-three T.Scheffer has then played conclusive effect for the prosperity of lcd technology, and the liquid-crystal display of STN type is widely used in multiple fields such as word processor, facsimile recorder, game machine, e-dictionary, pager, mobile telephone.Though begin to be developed rapidly from the mid-80 thin film transistor (Thin Solid Film:TFT) liquid-crystal display, up to the present occupy one seat in small-medium size demonstration field, but because the production technology that TN and stn liquid crystal show is simple, with low cost, power consumption is little, drive simply, so still occupy dominant position in small-medium size demonstration field.Meanwhile, the requirement of developing medium-to-high grade TN, the liquid-crystal display of STN type is also more and more higher, low voltage drive when especially showing for realization, wide operating temperature range and response fast, the development dielectric anisotropy is big, fusing point is low, and the wide and low viscous high-performance liquid crystal material of mesomorphic temperature range becomes and presses for.
3, characteristics such as 4-difluorophenol ester liquid crystal is a compounds of widely using in TN, the liquid-crystal display of STN type at present, and this compounds has fat-soluble good, and specific inductivity is relatively large.
Summary of the invention
The purpose of this invention is to provide a kind of 3,4-difluoro-2-methoxy phenol ester derivative and preparation method thereof.
Provided by the present invention 3,4-difluoro-2-methoxy phenol ester derivative, its structural formula are formula I,
Wherein, R is that carbonatoms is the alkyl of 1-15;
A, B are
Or
: m, n are 0 or 1, and m and n are not 0 simultaneously.
More specifically, the present invention 3, and the 4-difluoro-2-methoxy phenol ester derivative is following compound:
4 '-methyl-phenylformic acid-3, the 4-difluoro-2-methoxy phenol ester,
4 '-ethyl-phenylformic acid-3, the 4-difluoro-2-methoxy phenol ester,
4 '-propyl group-phenylformic acid-3, the 4-difluoro-2-methoxy phenol ester,
4 '-butyl-phenylformic acid-3, the 4-difluoro-2-methoxy phenol ester,
4 '-amyl group-phenylformic acid-3, the 4-difluoro-2-methoxy phenol ester,
4 '-hexyl-phenylformic acid-3, the 4-difluoro-2-methoxy phenol ester,
4 '-heptyl-phenylformic acid-3, the 4-difluoro-2-methoxy phenol ester,
4 '-octyl group-phenylformic acid-3, the 4-difluoro-2-methoxy phenol ester,
4 '-nonyl-phenylformic acid-3, the 4-difluoro-2-methoxy phenol ester,
4 '-decyl-phenylformic acid-3, the 4-difluoro-2-methoxy phenol ester,
4 '-undecyl-phenylformic acid-3, the 4-difluoro-2-methoxy phenol ester,
4 '-dodecyl-phenylformic acid-3, the 4-difluoro-2-methoxy phenol ester,
4 '-tridecyl-phenylformic acid-3, the 4-difluoro-2-methoxy phenol ester,
4 '-tetradecyl-phenylformic acid-3, the 4-difluoro-2-methoxy phenol ester,
4 '-pentadecyl-phenylformic acid-3, the 4-difluoro-2-methoxy phenol ester,
4 '-(4 "-trans-methylcyclohexyl)-phenylformic acid-3, the 4-difluoro-2-methoxy phenol ester,
4 '-(4 "-trans-ethyl cyclohexyl)-phenylformic acid-3, the 4-difluoro-2-methoxy phenol ester,
4 '-(4 "-trans-propyl group cyclohexyl)-phenylformic acid-3, the 4-difluoro-2-methoxy phenol ester,
4 '-(4 "-trans-butyl cyclohexyl)-phenylformic acid-3, the 4-difluoro-2-methoxy phenol ester,
4 '-(4 "-trans-amyl group cyclohexyl)-phenylformic acid-3, the 4-difluoro-2-methoxy phenol ester,
4 '-(4 "-trans-hexyl cyclohexyl)-phenylformic acid-3, the 4-difluoro-2-methoxy phenol ester,
4 '-(4 "-trans-heptyl cyclohexyl)-phenylformic acid-3, the 4-difluoro-2-methoxy phenol ester,
4 '-(4 "-trans-octyl group cyclohexyl)-phenylformic acid-3, the 4-difluoro-2-methoxy phenol ester,
4 '-(4 "-trans-nonyl cyclohexyl)-phenylformic acid-3, the 4-difluoro-2-methoxy phenol ester,
4 '-(4 "-trans-decyl cyclohexyl)-phenylformic acid-3, the 4-difluoro-2-methoxy phenol ester,
4 '-(4 "-trans-undecyl cyclohexyl)-phenylformic acid-3, the 4-difluoro-2-methoxy phenol ester,
4 '-(4 "-trans-dodecyl cyclohexyl)-phenylformic acid-3, the 4-difluoro-2-methoxy phenol ester,
4 '-(4 "-trans-tridecyl cyclohexyl)-phenylformic acid-3, the 4-difluoro-2-methoxy phenol ester,
4 '-(4 "-trans-tetradecyl cyclohexyl)-phenylformic acid-3, the 4-difluoro-2-methoxy phenol ester,
4 '-(4 "-trans-pentadecyl cyclohexyl)-phenylformic acid-3, the 4-difluoro-2-methoxy phenol ester,
4 '-trans-methyl-cyclohexyl base formic acid-3, the 4-difluoro-2-methoxy phenol ester,
4 '-trans-ethyl-hexahydrobenzoic acid-3, the 4-difluoro-2-methoxy phenol ester,
4 '-trans-propyl group-hexahydrobenzoic acid-3, the 4-difluoro-2-methoxy phenol ester,
4 '-trans-butyl-hexahydrobenzoic acid-3, the 4-difluoro-2-methoxy phenol ester,
4 '-trans-amyl group-hexahydrobenzoic acid-3, the 4-difluoro-2-methoxy phenol ester,
4 '-trans-hexyl-hexahydrobenzoic acid-3, the 4-difluoro-2-methoxy phenol ester,
4 '-trans-heptyl-hexahydrobenzoic acid-3, the 4-difluoro-2-methoxy phenol ester,
4 '-trans-octyl group-hexahydrobenzoic acid-3, the 4-difluoro-2-methoxy phenol ester,
4 '-trans-nonyl-hexahydrobenzoic acid-3, the 4-difluoro-2-methoxy phenol ester,
4 '-trans-decyl-hexahydrobenzoic acid-3, the 4-difluoro-2-methoxy phenol ester,
4 '-trans-undecyl-hexahydrobenzoic acid-3, the 4-difluoro-2-methoxy phenol ester,
4 '-trans-dodecyl-hexahydrobenzoic acid-3, the 4-difluoro-2-methoxy phenol ester,
4 '-trans-tridecyl-hexahydrobenzoic acid-3, the 4-difluoro-2-methoxy phenol ester,
4 '-trans-tetradecyl-hexahydrobenzoic acid-3, the 4-difluoro-2-methoxy phenol ester,
4 '-trans-pentadecyl-hexahydrobenzoic acid-3, the 4-difluoro-2-methoxy phenol ester,
4 '-trans-(4 "-trans-methylcyclohexyl)-hexahydrobenzoic acid-3, the 4-difluoro-2-methoxy phenol ester,
4 '-trans-(4 "-trans-ethyl cyclohexyl)-hexahydrobenzoic acid-3, the 4-difluoro-2-methoxy phenol ester,
4 '-trans-(4 "-trans-propyl group cyclohexyl)-hexahydrobenzoic acid-3, the 4-difluoro-2-methoxy phenol ester,
4 '-trans-(4 "-trans-butyl cyclohexyl)-hexahydrobenzoic acid-3, the 4-difluoro-2-methoxy phenol ester,
4 '-trans-(4 "-trans-amyl group cyclohexyl)-hexahydrobenzoic acid-3, the 4-difluoro-2-methoxy phenol ester,
4 '-trans-(4 "-trans-hexyl cyclohexyl)-hexahydrobenzoic acid-3, the 4-difluoro-2-methoxy phenol ester,
4 '-trans-(4 "-trans-heptyl cyclohexyl)-hexahydrobenzoic acid-3, the 4-difluoro-2-methoxy phenol ester,
4 '-trans-(4 "-trans-octyl group cyclohexyl)-hexahydrobenzoic acid-3, the 4-difluoro-2-methoxy phenol ester,
4 '-trans-(4 "-trans-nonyl cyclohexyl)-hexahydrobenzoic acid-3, the 4-difluoro-2-methoxy phenol ester,
4 '-trans-(4 "-trans-decyl cyclohexyl)-hexahydrobenzoic acid-3, the 4-difluoro-2-methoxy phenol ester,
4 '-trans-(4 "-trans-undecyl cyclohexyl)-hexahydrobenzoic acid-3, the 4-difluoro-2-methoxy phenol ester,
4 '-trans-(4 "-trans-dodecyl cyclohexyl)-hexahydrobenzoic acid-3, the 4-difluoro-2-methoxy phenol ester,
4 '-trans-(4 "-trans-tridecyl cyclohexyl)-hexahydrobenzoic acid-3, the 4-difluoro-2-methoxy phenol ester,
4 '-trans-(4 "-trans-tetradecyl cyclohexyl)-hexahydrobenzoic acid-3, the 4-difluoro-2-methoxy phenol ester,
4 '-trans-(4 "-trans-pentadecyl cyclohexyl)-hexahydrobenzoic acid-3, the 4-difluoro-2-methoxy phenol ester.
Above-mentioned 3, the preparation method of 4-difluoro-2-methoxy phenol ester derivative, comprise the steps: 1) preparation 3,4-difluoro-2-methoxy phenol: with 3,4-difluoro-2-methoxyl bromobenzene and MAGNESIUM METAL reaction generate Grignard reagent, with the trimethyl borate reaction, obtain structural formula after the hydrolysis suc as formula 3 of II, 4-difluoro-2-methoxy phenol then; 2) preparation 3, the 4-difluoro-2-methoxy phenol ester derivative: with structural formula suc as formula 3 of II, the compound of 4-difluoro-2-methoxy phenol and structural formula such as formula III carries out condensation reaction under catalyzer and dewatering agent effect, obtain described 3, the 4-difluoro-2-methoxy phenol ester derivative; Described catalyzer is 4-N, the N-dimethyl aminopyridine; Described dewatering agent is N, N '-dicyclohexyl carbon imide;
Formula (II) formula (III)
Wherein, R is that carbonatoms is the alkyl of 1-15; A, B are
Or
: m, n are 0 or 1, and m and n are not 0 simultaneously.
Wherein, the temperature of condensation reaction is 0-60 ℃, and reaction solvent is a methylene dichloride.
Another object of the present invention provides the present invention 3, the purposes of 4-difluoro-2-methoxy phenol ester derivative.
Advantages such as it is big that The compounds of this invention has dielectric anisotropy (Δ ε), and fusing point is low are a kind of well behaved liquid crystal display materials, particularly as twisted nematic liquid crystals (TN) material or super-twist nematic liquid crystal (STN) material.
The present invention is 3, introduced methoxyl group on the phenyl ring side direction of 4-difluorophenol, because such group spatial volume is less, little and the average dipole direction of galvanic couple distance is in the molecular long axis direction, so not only help increasing the dielectric anisotropy of compound molecule in the molecular long axis direction, and can reduce fusing point, the temperature range of expansion mesomorphous phase.The The compounds of this invention preparation method is simple, and in liquid-crystal display, especially wide temperature, low valve valve field of liquid crystal display have broad application prospects.
Embodiment
Embodiment 1, preparation 4 '-propyl group-phenylformic acid-3, the 4-difluoro-2-methoxy phenol ester
1, preparation 3,4-difluoro-2-methoxy phenol
In the 250ml there-necked flask, add 22.3g (0.1mol) 3,4-difluoro-2-methoxyl bromobenzene, the 50ml tetrahydrofuran (THF), 2.43g (0.1mol) MAGNESIUM METAL and 1～2 iodine at room temperature stir after 1 hour after the initiation reaction, system temperature are reduced to-70 ℃ with ethanol-liquid nitrogen system, under this temperature, slowly drip 10.4g (0.1mol) trimethyl borate, dropwise the back and make it rise to room temperature naturally under agitation condition, dripping 10%HCl (quality) solution then is 1 to the pH value, reflux 1 hour.With behind the petroleum ether extraction water of 100ml * 3, use the saturated common salt water washing again reaction solution cooling back, spend the night with anhydrous sodium sulfate drying to neutral.Dried solution revolved steam solution, obtain 15.9g3,4-difluoro-2-methoxy boric acid.Above-mentioned substance is placed the 500ml there-necked flask, add ether 50ml, sherwood oil 100ml, agitation condition drip 125ml10%H down
2O
2(quality) aqueous solution drips off back stirring and refluxing 3 hours.Question response liquid is cooled to room temperature, with using 100ml, 75ml, 50ml petroleum ether extraction respectively, is washed to neutrality with saturated common salt after the merging organic phase, spends the night with anhydrous sodium sulfate drying again.Dried organic phase is revolved steaming, obtain 3,4-difluoro-2-methoxy phenol crude product 12.5g.Use the dehydrated alcohol recrystallization at last, obtain 3,4-difluoro-2-methoxy phenol 10.4g, gas chromatographic purity is 99.5%, yield 65%.
2, preparation 4 '-propyl group-phenylformic acid-3, the 4-difluoro-2-methoxy phenol ester
In the 100ml there-necked flask, add 4g (0.025mol) 3,4-difluoro-2-methoxy phenol, 4.1g (0.025mol) 4-propylbenzoic acid and 50ml methylene dichloride, make it after the stirring to dissolve fully, add 0.5g (0.004mol) 4-N again, N-dimethyl aminopyridine and 6.7g (0.0325mol) N, N '-dicyclohexyl carbon imide, room temperature condition stirred 8 hours down, again 55 ℃ of following back flow reaction 2 hours.Be cooled to filtering solid after the room temperature, obtain 4 '-propyl group-phenylformic acid-3,4-difluoro-2-methoxy phenol ester crude product 7.5g after the gained organic phase is spin-dried for solvent.With the 20ml volume ratio is the mixed solvent recrystallization of 3: 1 dehydrated alcohol and sherwood oil, obtains 6.894 '-propyl group-phenylformic acid-3, the 4-difluoro-2-methoxy phenol ester, and gas chromatographic purity is 99.7%, yield is 87%.
DSC：Cr30.9℃?I
IR：2962，2930，2873，2840，1743，1626，1610，1500，1480，1431，1410，1315，1269，1232，1178，1146，1082，1049，1018，945，854，795，696，525
MS：306(M
+)，160，147，131，119，118，115，103，101，91，90，89，77，63，51，41
Show that the gained compound is correct.
The dielectric anisotropy of this compound (Δ ε) is: 8.5.
Can obtain with identical method:
4 '-methyl-phenylformic acid-3, the 4-difluoro-2-methoxy phenol ester,
4 '-ethyl-phenylformic acid-3, the 4-difluoro-2-methoxy phenol ester,
4 '-butyl-phenylformic acid-3, the 4-difluoro-2-methoxy phenol ester,
4 '-amyl group-phenylformic acid-3, the 4-difluoro-2-methoxy phenol ester,
4 '-hexyl-phenylformic acid-3, the 4-difluoro-2-methoxy phenol ester,
4 '-heptyl-phenylformic acid-3, the 4-difluoro-2-methoxy phenol ester,
4 '-octyl group-phenylformic acid-3, the 4-difluoro-2-methoxy phenol ester,
4 '-nonyl-phenylformic acid-3, the 4-difluoro-2-methoxy phenol ester,
4 '-decyl-phenylformic acid-3, the 4-difluoro-2-methoxy phenol ester,
4 '-undecyl-phenylformic acid-3, the 4-difluoro-2-methoxy phenol ester,
4 '-dodecyl-phenylformic acid-3, the 4-difluoro-2-methoxy phenol ester,
4 '-tridecyl-phenylformic acid-3, the 4-difluoro-2-methoxy phenol ester,
4 '-tetradecyl-phenylformic acid-3, the 4-difluoro-2-methoxy phenol ester,
4 '-pentadecyl-phenylformic acid-3, the 4-difluoro-2-methoxy phenol ester.
Embodiment 2, preparation 4 '-(4 "-trans-propyl group cyclohexyl)-phenylformic acid-3, the 4-difluoro-2-methoxy phenol ester
In the 100ml there-necked flask, add 4g (0.025mol) embodiment 1 gained 3,4-difluoro-2-methoxy phenol, 6.15g (0.025mol) 4-(4 '-trans-propyl group cyclohexyl)-phenylformic acid and 50ml methylene dichloride, make it after the stirring to dissolve fully, add 0.5g (0.004mol) 4-N again, N-dimethyl aminopyridine and 6.7g (0.0325mol) N, N '-dicyclohexyl carbon imide, room temperature condition stirred 8 hours down, and 60 ℃ were refluxed 2 hours down again.Be cooled to filtering solid after the room temperature, the gained organic phase is spin-dried for obtains 4 ' behind the solvent-(4 "-trans-propyl group cyclohexyl)-phenylformic acid-3,4-difluoro-2-methoxy phenol ester crude product 8.2g.With the 30ml volume ratio is the mixed solvent recrystallization of 4: 1 dehydrated alcohol and sherwood oil, obtain 4 '-(4 "-trans-propyl group cyclohexyl)-phenylformic acid-3, the 4-difluoro-2-methoxy phenol ester, gas chromatographic purity is 99.8%, yield is 54%.
DSC：Cr83.2℃?I
IR：3010，2927，2848，1743，1608，1500，1489，1431，1313，1267，1232，1180，1078，1047，1016，943，850，798，700，669，526
MS：388(M
+)，229，201，185，160，145，131，115，105，91，83，77，67
Proof gained compound is correct.
The dielectric anisotropy of this compound (Δ ε) is: 11.2.
Can obtain with identical method:
4 '-(4 "-trans-methylcyclohexyl)-phenylformic acid-3, the 4-difluoro-2-methoxy phenol ester,
4 '-(4 "-trans-ethyl cyclohexyl)-phenylformic acid-3, the 4-difluoro-2-methoxy phenol ester,
4 '-(4 "-trans-butyl cyclohexyl)-phenylformic acid-3, the 4-difluoro-2-methoxy phenol ester,
4 '-(4 "-trans-amyl group cyclohexyl)-phenylformic acid-3, the 4-difluoro-2-methoxy phenol ester,
4 '-(4 "-trans-hexyl cyclohexyl)-phenylformic acid-3, the 4-difluoro-2-methoxy phenol ester,
4 '-(4 "-trans-heptyl cyclohexyl)-phenylformic acid-3, the 4-difluoro-2-methoxy phenol ester,
4 '-(4 "-trans-octyl group cyclohexyl)-phenylformic acid-3, the 4-difluoro-2-methoxy phenol ester,
4 '-(4 "-trans-nonyl cyclohexyl)-phenylformic acid-3, the 4-difluoro-2-methoxy phenol ester,
4 '-(4 "-trans-decyl cyclohexyl)-phenylformic acid-3, the 4-difluoro-2-methoxy phenol ester,
4 '-(4 "-trans-undecyl cyclohexyl)-phenylformic acid-3, the 4-difluoro-2-methoxy phenol ester,
4 '-(4 "-trans-dodecyl cyclohexyl)-phenylformic acid-3, the 4-difluoro-2-methoxy phenol ester,
4 '-(4 "-trans-tridecyl cyclohexyl)-phenylformic acid-3, the 4-difluoro-2-methoxy phenol ester,
4 '-(4 "-trans-tetradecyl cyclohexyl)-phenylformic acid-3, the 4-difluoro-2-methoxy phenol ester,
4 '-(4 "-trans-pentadecyl cyclohexyl)-phenylformic acid-3, the 4-difluoro-2-methoxy phenol ester.
Embodiment 3, preparation 4 '-trans-propyl group-hexahydrobenzoic acid-3, the 4-difluoro-2-methoxy phenol ester
In the 100ml there-necked flask, add 4g (0.025mol) embodiment 1 gained 3,4-difluoro-2-methoxy phenol, 4.25g (0.025mol) 4-trans-propyl group-hexahydrobenzoic acid and 50ml methylene dichloride, make it after the stirring to dissolve fully, add 0.5g (0.004mol) 4-N again, N-dimethyl aminopyridine and 6.7g (0.0325mol) N, N '-dicyclohexyl carbon two acyl Asias are dizzy, 0 ℃ of following stirring reaction 20 hours, filtering solid then, obtain 4 '-trans-propyl group-hexahydrobenzoic acid-3,4-difluoro-2-methoxy phenol ester crude product 7.8g after each gained organic phase is spin-dried for solvent.With the 30ml volume ratio is the mixed solvent recrystallization of 4: 1 dehydrated alcohol and sherwood oil, obtains 7.0g4 '-trans-propyl group-hexahydrobenzoic acid-3, the 4-difluoro-2-methoxy phenol ester, and gas chromatographic purity is 99.5%, yield is 88%.
DSC：Cr43.5℃?I
IR：3030，2924，2854，1751，1630，1498，1444，1381，1321，1315，1236，1173，1150，1132，1061，1001，935，823，673，573
MS：312(M
+)，160，153，145，125，113，101，88，83，81，79，67，57，55，53，43
Proof gained compound is correct.
The dielectric anisotropy of this compound (Δ ε) is: 4.5.
Can obtain with identical method:
4 '-trans-methyl-cyclohexyl base formic acid-3, the 4-difluoro-2-methoxy phenol ester,
4 '-trans-ethyl-hexahydrobenzoic acid-3, the 4-difluoro-2-methoxy phenol ester,
4 '-trans-butyl-hexahydrobenzoic acid-3, the 4-difluoro-2-methoxy phenol ester,
4 '-trans-amyl group-hexahydrobenzoic acid-3, the 4-difluoro-2-methoxy phenol ester,
4 '-trans-hexyl-hexahydrobenzoic acid-3, the 4-difluoro-2-methoxy phenol ester,
4 '-trans-heptyl-hexahydrobenzoic acid-3, the 4-difluoro-2-methoxy phenol ester,
4 '-trans-octyl group-hexahydrobenzoic acid-3, the 4-difluoro-2-methoxy phenol ester,
4 '-trans-nonyl-hexahydrobenzoic acid-3, the 4-difluoro-2-methoxy phenol ester,
4 '-trans-decyl-hexahydrobenzoic acid-3, the 4-difluoro-2-methoxy phenol ester,
4 '-trans-undecyl-hexahydrobenzoic acid-3, the 4-difluoro-2-methoxy phenol ester,
4 '-trans-dodecyl-hexahydrobenzoic acid-3, the 4-difluoro-2-methoxy phenol ester,
4 '-trans-tridecyl-hexahydrobenzoic acid-3, the 4-difluoro-2-methoxy phenol ester,
4 '-trans-tetradecyl-hexahydrobenzoic acid-3, the 4-difluoro-2-methoxy phenol ester,
4 '-trans-pentadecyl-hexahydrobenzoic acid-3, the 4-difluoro-2-methoxy phenol ester.
Embodiment 4, preparation 4 '-trans-(4 "-trans-propyl group cyclohexyl)-hexahydrobenzoic acid-3, the 4-difluoro-2-methoxy phenol ester
In the 100ml there-necked flask, add 4g (0.025mol) embodiment 1 gained 3,4-difluoro-2-methoxy phenol, 6.3g (0.025mol) 4-trans-(4 '-trans-propyl group cyclohexyl)-hexahydrobenzoic acid and 50ml methylene dichloride, make it after the stirring to dissolve fully, add 0.5g (0.004mol) 4-N again, N-dimethyl aminopyridine and 6.7g (0.0325mol) N, N '-dicyclohexyl carbon imide, room temperature condition stirred 15 hours down, filtering solid then, to fall the gained organic phase is spin-dried for and obtains 4 ' behind the solvent-trans-(4 "-trans-propyl group cyclohexyl)-hexahydrobenzoic acid-3,4-difluoro-2-methoxy phenol ester crude product 8.0g.With the 30ml volume ratio is the mixed solvent recrystallization of 4: 1 dehydrated alcohol and sherwood oil, obtain 5.8g 4 '-trans-(4 "-trans-propyl group cyclohexyl)-hexahydrobenzoic acid-3; the 4-difluoro-2-methoxy phenol ester, gas phase city spectral purity is 99.7%, and yield is 59%.
DSC：Cr68.9℃?N122.4℃?I
IR：3010，2926，2850，1761，1628，1502，1435，1375，1309，1238，1157，1120，1063，1003，951，827，798，671，563
MS：394(M+)，235，217，207，165，160，151，145，137，125，123，111，109，97，95，83，81，79，69，55。
Proof gained compound is correct.
The dielectric anisotropy of this compound (Δ ε) is: 7.2.
Can obtain with identical method:
4 '-trans-(4 "-trans-methylcyclohexyl)-hexahydrobenzoic acid-3, the 4-difluoro-2-methoxy phenol ester,
4 '-trans-(4 "-trans-ethyl cyclohexyl)-hexahydrobenzoic acid-3, the 4-difluoro-2-methoxy phenol ester,
4 '-trans-(4 "-trans-butyl cyclohexyl)-hexahydrobenzoic acid-3, the 4-difluoro-2-methoxy phenol ester,
4 '-trans-(4 "-trans-amyl group cyclohexyl)-hexahydrobenzoic acid-3, the 4-difluoro-2-methoxy phenol ester,
4 '-trans-(4 "-trans-hexyl cyclohexyl)-hexahydrobenzoic acid-3, the 4-difluoro-2-methoxy phenol ester,
4 '-trans-(4 "-trans-heptyl cyclohexyl)-hexahydrobenzoic acid-3, the 4-difluoro-2-methoxy phenol ester,
4 '-trans-(4 "-trans-octyl group cyclohexyl)-hexahydrobenzoic acid-3, the 4-difluoro-2-methoxy phenol ester,
4 '-trans-(4 "-trans-nonyl cyclohexyl)-hexahydrobenzoic acid-3, the 4-difluoro-2-methoxy phenol ester,
4 '-trans-(4 "-trans-decyl cyclohexyl)-hexahydrobenzoic acid-3, the 4-difluoro-2-methoxy phenol ester,
4 '-trans-(4 "-trans-undecyl cyclohexyl)-hexahydrobenzoic acid-3, the 4-difluoro-2-methoxy phenol ester,
4 '-trans-(4 "-trans-dodecyl cyclohexyl)-hexahydrobenzoic acid-3, the 4-difluoro-2-methoxy phenol ester,
4 '-trans-(4 "-trans-tridecyl cyclohexyl)-hexahydrobenzoic acid-3, the 4-difluoro-2-methoxy phenol ester,
4 '-trans-(4 "-trans-tetradecyl cyclohexyl)-hexahydrobenzoic acid-3, the 4-difluoro-2-methoxy phenol ester,
4 '-trans-(4 "-trans-pentadecyl cyclohexyl)-hexahydrobenzoic acid-3, the 4-difluoro-2-methoxy phenol ester.
Claims (6)
1,3,4-difluoro-2-methoxy phenol ester derivative, its structural formula are formula I,
Wherein, R is that carbonatoms is the alkyl of 1-15;
A, B are
Or
M, n are 0 or 1, and m and n are not 0 simultaneously.
2, according to claim 13, the 4-difluoro-2-methoxy phenol ester derivative is characterized in that: described 3, the 4-difluoro-2-methoxy phenol ester derivative is:
4 '-methyl-phenylformic acid-3, the 4-difluoro-2-methoxy phenol ester,
4 '-ethyl-phenylformic acid-3, the 4-difluoro-2-methoxy phenol ester,
4 '-propyl group-phenylformic acid-3, the 4-difluoro-2-methoxy phenol ester,
4 '-butyl-phenylformic acid-3, the 4-difluoro-2-methoxy phenol ester,
4 '-amyl group-phenylformic acid-3, the 4-difluoro-2-methoxy phenol ester,
4 '-hexyl-phenylformic acid-3, the 4-difluoro-2-methoxy phenol ester,
4 '-heptyl-phenylformic acid-3, the 4-difluoro-2-methoxy phenol ester,
4 '-octyl group-phenylformic acid-3, the 4-difluoro-2-methoxy phenol ester,
4 '-nonyl-phenylformic acid-3, the 4-difluoro-2-methoxy phenol ester,
4 '-decyl-phenylformic acid-3, the 4-difluoro-2-methoxy phenol ester,
4 '-undecyl-phenylformic acid-3, the 4-difluoro-2-methoxy phenol ester,
4 '-dodecyl-phenylformic acid-3, the 4-difluoro-2-methoxy phenol ester,
4 '-tridecyl-phenylformic acid-3, the 4-difluoro-2-methoxy phenol ester,
4 '-tetradecyl-phenylformic acid-3, the 4-difluoro-2-methoxy phenol ester,
4 '-pentadecyl-phenylformic acid-3, the 4-difluoro-2-methoxy phenol ester,
4 '-(4 "-trans-methylcyclohexyl)-phenylformic acid-3, the 4-difluoro-2-methoxy phenol ester,
4 '-(4 "-trans-ethyl cyclohexyl)-phenylformic acid-3, the 4-difluoro-2-methoxy phenol ester,
4 '-(4 "-trans-propyl group cyclohexyl)-phenylformic acid-3, the 4-difluoro-2-methoxy phenol ester,
4 '-(4 "-trans-butyl cyclohexyl)-phenylformic acid-3, the 4-difluoro-2-methoxy phenol ester,
4 '-(4 "-trans-amyl group cyclohexyl)-phenylformic acid-3, the 4-difluoro-2-methoxy phenol ester,
4 '-(4 "-trans-hexyl cyclohexyl)-phenylformic acid-3, the 4-difluoro-2-methoxy phenol ester,
4 '-(4 "-trans-heptyl cyclohexyl)-phenylformic acid-3, the 4-difluoro-2-methoxy phenol ester,
4 '-(4 "-trans-octyl group cyclohexyl)-phenylformic acid-3, the 4-difluoro-2-methoxy phenol ester,
4 '-(4 "-trans-nonyl cyclohexyl)-phenylformic acid-3, the 4-difluoro-2-methoxy phenol ester,
4 '-(4 "-trans-decyl cyclohexyl)-phenylformic acid-3, the 4-difluoro-2-methoxy phenol ester,
4 '-(4 "-trans-undecyl cyclohexyl)-phenylformic acid-3, the 4-difluoro-2-methoxy phenol ester,
4 '-(4 "-trans-dodecyl cyclohexyl)-phenylformic acid-3, the 4-difluoro-2-methoxy phenol ester,
4 '-(4 "-trans-tridecyl cyclohexyl)-phenylformic acid-3, the 4-difluoro-2-methoxy phenol ester,
4 '-(4 "-trans-tetradecyl cyclohexyl)-phenylformic acid-3, the 4-difluoro-2-methoxy phenol ester,
4 '-(4 "-trans-pentadecyl cyclohexyl)-phenylformic acid-3, the 4-difluoro-2-methoxy phenol ester,
4 '-trans-methyl-cyclohexyl base formic acid-3, the 4-difluoro-2-methoxy phenol ester,
4 '-trans-ethyl-hexahydrobenzoic acid-3, the 4-difluoro-2-methoxy phenol ester,
4 '-trans-propyl group-hexahydrobenzoic acid-3, the 4-difluoro-2-methoxy phenol ester,
4 '-trans-butyl-hexahydrobenzoic acid-3, the 4-difluoro-2-methoxy phenol ester,
4 '-trans-amyl group-hexahydrobenzoic acid-3, the 4-difluoro-2-methoxy phenol ester,
4 '-trans-hexyl-hexahydrobenzoic acid-3, the 4-difluoro-2-methoxy phenol ester,
4 '-trans-heptyl-hexahydrobenzoic acid-3, the 4-difluoro-2-methoxy phenol ester,
4 '-trans-octyl group-hexahydrobenzoic acid-3, the 4-difluoro-2-methoxy phenol ester,
4 '-trans-nonyl-hexahydrobenzoic acid-3, the 4-difluoro-2-methoxy phenol ester,
4 '-trans-decyl-hexahydrobenzoic acid-3, the 4-difluoro-2-methoxy phenol ester,
4 '-trans-undecyl-hexahydrobenzoic acid-3, the 4-difluoro-2-methoxy phenol ester,
4 '-trans-dodecyl-hexahydrobenzoic acid-3, the 4-difluoro-2-methoxy phenol ester,
4 '-trans-tridecyl-hexahydrobenzoic acid-3, the 4-difluoro-2-methoxy phenol ester,
4 '-trans-tetradecyl-hexahydrobenzoic acid-3, the 4-difluoro-2-methoxy phenol ester,
4 '-trans-pentadecyl-hexahydrobenzoic acid-3, the 4-difluoro-2-methoxy phenol ester,
4 '-trans-(4 "-trans-methylcyclohexyl)-hexahydrobenzoic acid-3, the 4-difluoro-2-methoxy phenol ester,
4 '-trans-(4 "-trans-ethyl cyclohexyl)-hexahydrobenzoic acid-3, the 4-difluoro-2-methoxy phenol ester,
4 '-trans-(4 "-trans-propyl group cyclohexyl)-hexahydrobenzoic acid-3, the 4-difluoro-2-methoxy phenol ester,
4 '-trans-(4 "-trans-butyl cyclohexyl)-hexahydrobenzoic acid-3, the 4-difluoro-2-methoxy phenol ester,
4 '-trans-(4 "-trans-amyl group cyclohexyl)-hexahydrobenzoic acid-3, the 4-difluoro-2-methoxy phenol ester,
4 '-trans-(4 "-trans-hexyl cyclohexyl)-hexahydrobenzoic acid-3, the 4-difluoro-2-methoxy phenol ester,
4 '-trans-(4 "-trans-heptyl cyclohexyl)-hexahydrobenzoic acid-3, the 4-difluoro-2-methoxy phenol ester,
4 '-trans-(4 "-trans-octyl group cyclohexyl)-hexahydrobenzoic acid-3, the 4-difluoro-2-methoxy phenol ester,
4 '-trans-(4 "-trans-nonyl cyclohexyl)-hexahydrobenzoic acid-3, the 4-difluoro-2-methoxy phenol ester,
4 '-trans-(4 "-trans-decyl cyclohexyl)-hexahydrobenzoic acid-3, the 4-difluoro-2-methoxy phenol ester,
4 '-trans-(4 "-trans-undecyl cyclohexyl)-hexahydrobenzoic acid-3, the 4-difluoro-2-methoxy phenol ester,
4 '-trans-(4 "-trans-dodecyl cyclohexyl)-hexahydrobenzoic acid-3, the 4-difluoro-2-methoxy phenol ester,
4 '-trans-(4 "-trans-tridecyl cyclohexyl)-hexahydrobenzoic acid-3, the 4-difluoro-2-methoxy phenol ester,
4 '-trans-(4 "-trans-tetradecyl cyclohexyl)-hexahydrobenzoic acid-3, the 4-difluoro-2-methoxy phenol ester,
4 '-trans-(4 "-trans-pentadecyl cyclohexyl)-hexahydrobenzoic acid-3, the 4-difluoro-2-methoxy phenol ester.
3, claim 1 described 3, the preparation method of 4-difluoro-2-methoxy phenol ester derivative, comprise the steps: 1) preparation 3,4-difluoro-2-methoxy phenol: with 3,4-difluoro-2-methoxyl bromobenzene and MAGNESIUM METAL reaction generate Grignard reagent, with the trimethyl borate reaction, obtain structural formula after the hydrolysis suc as formula 3 of II, 4-difluoro-2-methoxy phenol then; 2) preparation 3, the 4-difluoro-2-methoxy phenol ester derivative: with structural formula suc as formula 3 of II, the compound of 4-difluoro-2-methoxy phenol and structural formula such as formula III carries out condensation reaction under catalyzer and dewatering agent effect, obtain described 3, the 4-difluoro-2-methoxy phenol ester derivative; Described catalyzer is 4-N, and N-dimethyl aminopyridine, described dewatering agent are N, N '-dicyclohexyl carbon imide;
Wherein, R is that carbonatoms is the alkyl of 1-15;
A, B are
Or
M, n are 0 or 1, and m and n are not 0 simultaneously.
4, preparation method according to claim 3 is characterized in that: step 2) temperature of described condensation reaction is 0-60 ℃, reaction solvent is a methylene dichloride.
5, described 3 with claim 1, the 4-difluoro-2-methoxy phenol ester derivative is the liquid crystal display material of main component.
6, liquid crystal display material according to claim 5 is characterized in that: described liquid crystal display material is twisted nematic liquid crystals material or super-twist nematic liquid crystal material.
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