2628-17-3

Basic information

• Product Name: 4-Hydroxystyrene
• Synonyms: 4-Vinylphenol solution 10 wt. % in propylene glycol;4-Vinylphenol,10%soln.inpropyleneglycol;4-vinylphenol,4-ethenyl-phenol,p-hydroxystyrene;PARA-VINYLPHENOL;4-VINYLPHENOL, CA 10% SOLN. IN PROPYLENE GLYCOL;4-VINYLPHENOL (10% SOLUTION IN PROPYLENE GLYCOL);4-VINYL PHENOL 10% IN PROPYLENE GLYCOL;p-Oxystyrene
• CAS NO: 2628-17-3
• Molecular Formula: C₈H₈O
• Molecular Weight: 120.15
• EINECS: 220-103-6
• Product Categories: Aromatic Phenols
• Mol File: 2628-17-3.mol
• Article Data: 146

Chemical Properties

• Melting Point: 73 °C
• Boiling Point: 228.85°C (estimate)
• Flash Point: >230 °F
• Appearance: Clear colorless to orange/Liquid
• Density: 1.04
• Vapor Pressure: 9.38hPa at 25℃
• Refractive Index: 1.4440
• Storage Temp.: under inert gas (nitrogen or Argon) at 2-8°C
• Solubility: Chloroform (Sparingly), DMSO (Slightly)
• PKA: 9.95±0.26(Predicted)
• Water Solubility: Slightly miscible with water.
• Sensitive: Hygroscopic
• Stability: Light Sensitive
• BRN: 506844
• CAS DataBase Reference: 4-Hydroxystyrene(CAS DataBase Reference)
• NIST Chemistry Reference: 4-Hydroxystyrene(2628-17-3)
• EPA Substance Registry System: 4-Hydroxystyrene(2628-17-3)

Safety Data

• Hazard Codes: Xn
• Statements: 22-41
• Safety Statements: 26-39
• WGK Germany: 2
• RTECS: SN3800000
• Hazardous Substances Data: 2628-17-3(Hazardous Substances Data)

Usage

Chemical Properties

Different sources of media describe the Chemical Properties of 2628-17-3 differently. You can refer to the following data:
1. Colorless liquid
2. p-Vinylphenol has a vanilla extract odor.

Occurrence

4-Vinylphenol is found in wine and beer. It is produced by the spoilage yeast Brettanomyces. When it reaches concentrations greater than the sensory threshold, it can give the wine aromas described as barnyard, medicinal, band-aids, and mousy. In wine, 4-vinylphenol can react with other molecules, such as anthocyanidins, to produce new chemical compounds. In white wines vinylphenols are dominant (4-vinylphenol 70-1 150 μg/l, 4-vinylguaiacol 10-490 μg/l) whereas, in red wines, it is the corresponding ethyl phenols.Reported found in apple, cooked asparagus, dried bonito fish, cloudberries, cooked corn, roasted peanuts, rice bran, sandalwood, wild strawberries, vetiver oil, cooked apple, black currant, red wine, white wine, rose wine, coffee, green tea cognac, tomato, partially fermented tea, microbial fermented tea, black tea, heated soybean, coriander seeds, beer, cognac, peanut butter, soybean, beans, mushrooms, starfruit, tamarind, mango, rice, sweet corn, corn oil, malt, wort, rosemary and Bourbon vanilla.

Uses

4-Vinylphenol, 10 wt.% In Propylene Glycol can be used as a perfume oil mixture.

Definition

ChEBI: 4-hydroxystyrene is a member of the class of phenols that is styrene carrying a hydroxy substituent at position 4. It has a role as a human urinary metabolite and a human xenobiotic metabolite. It derives from a hydride of a styrene.

Aroma threshold values

Detection: 10 to 85 ppb

Taste threshold values

Taste characteristics at 60 ppm: phenolic, medicinal with sweet musty and meaty nuances.

Flammability and Explosibility

Notclassified

InChI:InChI=1/C8H8O/c1-2-7-3-5-8(9)6-4-7/h2-6,9H,1H2

Synthetic route

para-coumaric acid (7400-08-0) → 4-Vinylphenol (2628-17-3)

Conditions	Yield
With sodium hydroxide at 160℃; for 5h;	99.3%
With cucumber juice at 30 - 35℃; for 24h; Inert atmosphere; Green chemistry;	94%
With aluminum oxide; 1,8-diazabicyclo[5.4.0]undec-7-ene; hydroquinone In methanol for 0.333333h; microwave irradiation;	85%

Methyltriphenylphosphonium bromide (1779-49-3) + 4-hydroxy-benzaldehyde (123-08-0) → 4-Vinylphenol (2628-17-3)

Conditions	Yield
Stage #1: Methyltriphenylphosphonium bromide With potassium tert-butylate In tetrahydrofuran at 20℃; for 0.166667h; Stage #2: 4-hydroxy-benzaldehyde In tetrahydrofuran at 20℃; for 1h; Wittig Olefination;	98%
Stage #1: Methyltriphenylphosphonium bromide With potassium tert-butylate; sodium hydride In tetrahydrofuran at 20℃; for 0.166667h; Stage #2: 4-hydroxy-benzaldehyde In tetrahydrofuran at 20℃; for 19h;	95%
Stage #1: Methyltriphenylphosphonium bromide With n-butyllithium In tetrahydrofuran; hexane at 0℃; for 2h; Schlenk technique; Stage #2: 4-hydroxy-benzaldehyde In tetrahydrofuran at 0 - 20℃;	89%

malonic acid (141-82-2) + 4-hydroxy-benzaldehyde (123-08-0) → 4-Vinylphenol (2628-17-3)

Conditions	Yield
With ethylenediamine In N,N-dimethyl-formamide at 150℃; for 6h; Reagent/catalyst; Solvent; Large scale;	98%
With piperidine; 4-methoxy-phenol In hexane; 2-methoxy-ethanol at 65℃; for 24h; Reagent/catalyst; Temperature; Solvent;	87.4%
With piperidine In pyridine at 115℃; for 4h; Knoevenagel condensation reaction;	86%

p-Coumaric Acid (7400-08-0) → 4-Vinylphenol (2628-17-3)

Conditions	Yield
With 4-methoxy-phenol In water; N,N-dimethyl-formamide at 150℃; for 4h; Solvent;	97%
With 1-methyl-1H-imidazole; sodium hydrogencarbonate for 0.333333h; Heating; microwave irradiation;	94%
With bis(1-oxyl-2,2,6,6-tetramethylpiperidin-4-yl)sebacate; potassium acetate In DMF (N,N-dimethyl-formamide) at 150℃; for 1.5h; Product distribution / selectivity;	94%

N,N-dimethyl-L-tyrosine N-oxide (19704-86-0) → 4-Vinylphenol (2628-17-3)

Conditions	Yield
potassium acetate In N,N-dimethyl acetamide at 123℃; for 2.4h; Product distribution / selectivity;	97%

p-acetoxystyrene (2628-16-2) → 4-Vinylphenol (2628-17-3)

Conditions	Yield
With ethanol; sodium hydroxide at 20℃; for 4h; Inert atmosphere;	96%
With sodium hydroxide In tetrahydrofuran; water at 20℃; for 4h; Cooling with ice; Inert atmosphere; Schlenk technique;	96%
With ethanol; sodium hydroxide at 20℃; for 4h; Inert atmosphere;	96%

N,N-dimethyl-L-tyrosine N-oxide (19704-86-0) → p-Coumaric Acid (7400-08-0) + 4-Vinylphenol (2628-17-3)

Conditions	Yield
potassium acetate In N,N-dimethyl acetamide at 123℃; for 2.5h; Product distribution / selectivity;	A 4% B 96%

4-Vinylphenylboronic acid (2156-04-9) → 4-Vinylphenol (2628-17-3)

Conditions	Yield
With N,N-dimethyl-p-toluidine N-oxide In dichloromethane at 20℃; for 0.0166667h;	95%
With urea hydrogen peroxide adduct In acetonitrile at 27 - 29℃; for 0.75h; Temperature; Solvent; Green chemistry; chemoselective reaction;	95%
With copper(II) sulfate hydrate; potassium hydroxide In water at 20℃; for 24h;	91%

4-hydroxy-benzaldehyde (123-08-0) → 4-Vinylphenol (2628-17-3)

Conditions	Yield
With potassium tert-butylate; Methyltriphenylphosphonium bromide In tetrahydrofuran at 0 - 20℃; for 16h;	95%
Multi-step reaction with 2 steps 1: pyridine; glycine / 3 h / 80 °C / Sealed tube 2: pyridine; glycine / 8 h / 140 °C View Scheme
Multi-step reaction with 3 steps 1: potassium carbonate / dichloromethane / 2 h / 20 °C 2: potassium carbonate / tetrahydrofuran / 24 h / 70 °C 3: sodium hydroxide; methanol / 0.5 h / 20 °C View Scheme

4-bromo-phenol (106-41-2) + vinyl magnesium bromide (1826-67-1) → 4-Vinylphenol (2628-17-3)

Conditions	Yield
(1,1'-bis(diphenylphosphino)ferrocene)palladium(II) dichloride In tetrahydrofuran -78 deg C, 10 min, reflux, 0.5 h;	91%

4-hydroxy-benzaldehyde (123-08-0) + diethyl malonate (105-53-3) → 4-Vinylphenol (2628-17-3)

Conditions	Yield
With morpholine; 4-methoxy-phenol In N,N-dimethyl-formamide at 70℃; for 12h;	89.4%

1-bromo-4-ethenyl-benzene (2039-82-9) → 4-Vinylphenol (2628-17-3)

Conditions	Yield
With dicyclohexyl-(2′,4′,6′-triisopropyl-3,6-dimethoxy-[1,1′-biphenyl]-2-yl)phosphine; boric acid; palladium diacetate; caesium carbonate In 1-methyl-pyrrolidin-2-one at 80℃; for 24h; Schlenk technique; Inert atmosphere;	89%

4-bromo-phenol (106-41-2) + tri-n-butyl(vinyl)tin (7486-35-3) → 4-Vinylphenol (2628-17-3)

Conditions	Yield
With tris(dibenzylideneacetone)dipalladium (0); tri-tert-butyl phosphine In diethyl ether at 20℃; for 48h; Stille cross-coupling;	84%

p-acetoxystyrene (2628-16-2) → (R)-(+)-4-hydroxyphenyloxirane (1176829-46-1) + 4-Vinylphenol (2628-17-3)

Conditions	Yield
With dikegulac; water; urea hydrogen peroxide adduct In dichloromethane at 20℃; for 10h; Enzymatic reaction;	A 5% B 78%

4-hydroxy-benzaldehyde (123-08-0) + diazomethyl-trimethyl-silane (18107-18-1) → 4-Vinylphenol (2628-17-3)

Conditions	Yield
With tris(triphenylphosphine)rhodium(l) chloride; triphenylphosphine; isopropyl alcohol In tetrahydrofuran at 25℃; for 8h; Reagent/catalyst; chemoselective reaction;	78%

Cl-Mo(O)=CH2 (84809-63-2) + 4-hydroxy-benzaldehyde (123-08-0) → 4-Vinylphenol (2628-17-3) + 2-allylphenol (695-84-1)

Conditions	Yield
With salicylaldehyde In tetrahydrofuran	A 21% B 77%

Cl-Mo(O)=CH2 (84809-63-2) + salicylaldehyde (90-02-8) → 4-Vinylphenol (2628-17-3) + 2-allylphenol (695-84-1)

Conditions	Yield
With 4-hydroxy-benzaldehyde In tetrahydrofuran	A 21% B 77%

4-Hydroxyacetophenone (99-93-4) → 4-Vinylphenol (2628-17-3)

Conditions	Yield
With potassium hydroxide In isopropyl alcohol at 200℃; for 1.33333h; Reagent/catalyst; Time;	76%
Multi-step reaction with 3 steps 1: 100 percent / N,N-diisopropylethylamine / CH2Cl2 / 4 h 2: 97 percent / NaBH4 / aq. ethanol 3: 59 percent / 2-bromo-1,3,2-benzodioxaborole, N,N-diisopropylethylamine / CH2Cl2 / 3 h View Scheme
Multi-step reaction with 4 steps 1: aqueous NaOH 2: palladium/charcoal; methanol / 30 °C / 5884.06 Torr / Hydrogenation 3: acetic acid; Al2O3 / 350 °C / 25 Torr 4: aqueous KOH View Scheme

4-Iodophenol (540-38-5) + vinyl magnesium bromide (1826-67-1) → 4-Vinylphenol (2628-17-3)

Conditions	Yield
(1,1'-bis(diphenylphosphino)ferrocene)palladium(II) dichloride In tetrahydrofuran for 1.16667h;	75%
(1,1'-bis(diphenylphosphino)ferrocene)palladium(II) dichloride In tetrahydrofuran for 0.166667h; further catalyst; Yield given;

N,N-dimethyl-L-tyrosine N-oxide (19704-86-0) → N,N-dimethylhydroxylamine (5725-96-2) + p-Coumaric Acid (7400-08-0) + 4-Vinylphenol (2628-17-3)

Conditions	Yield
In N,N-dimethyl acetamide at 130℃; Product distribution / selectivity; Cope Elimination;	A n/a B 75% C 3.3%

4-Methoxystyrene (637-69-4) → 4-Vinylphenol (2628-17-3)

Conditions	Yield
With sodium thioethylate In N,N-dimethyl-formamide for 0.5h; Heating;	70%

4-vinylbenzyl chloride (1073-67-2) → 4-Vinylphenol (2628-17-3)

Conditions	Yield
With dicyclohexyl-(2′,4′,6′-triisopropyl-3,6-dimethoxy-[1,1′-biphenyl]-2-yl)phosphine; boric acid; palladium diacetate; caesium carbonate In 1-methyl-pyrrolidin-2-one at 100℃; for 14h; Schlenk technique; Inert atmosphere;	67%

1-(4-iodophenyl)ethanol (68120-56-9, 104013-25-4, 53207-29-7) → 4-Vinylphenol (2628-17-3)

Conditions	Yield
With copper(l) iodide; 8-quinolinol; potassium hydroxide In water; dimethyl sulfoxide; tert-butyl alcohol at 100℃; for 48h; Inert atmosphere;	60%

(RS)-1-<4-(2-methoxyethoxy)methoxyphenyl>ethanol (135921-81-2) → 4-Vinylphenol (2628-17-3)

Conditions	Yield
With bromocatecholborane; N-ethyl-N,N-diisopropylamine In dichloromethane for 3h;	59%
With bromocatecholborane; N-ethyl-N,N-diisopropylamine In dichloromethane for 3h; Mechanism;	59%

methyl-triphenylphosphonium iodide (2065-66-9) + 4-hydroxy-benzaldehyde (123-08-0) → 4-Vinylphenol (2628-17-3)

Conditions	Yield
Stage #1: methyl-triphenylphosphonium iodide With potassium tert-butylate In tetrahydrofuran for 1h; Inert atmosphere; Stage #2: 4-hydroxy-benzaldehyde In tetrahydrofuran at 25℃; for 24h; Wittig reaction; Inert atmosphere;	58%
With potassium tert-butylate In tetrahydrofuran Wittig Olefination;

4-((3H-diazirin-3-yl)methyl)phenol → 4-Vinylphenol (2628-17-3)

Conditions	Yield
In dichloromethane at 20℃; for 2h; UV-irradiation;	52%

3-(4-acetoxyphenyl)acrylic acid (27542-85-4, 50363-92-3, 15486-19-8) → 4-Vinylphenol (2628-17-3)

Conditions	Yield
With aluminum oxide; potassium hydroxide; ammonium acetate In water for 0.166667h; microwave irradiation;	49%

methyl phenylphosphonium bromide + 4-hydroxy-benzaldehyde (123-08-0) → 4-Vinylphenol (2628-17-3)

Conditions	Yield
With n-butyllithium In tetrahydrofuran; hexane at 0 - 20℃; for 12h; Inert atmosphere;	47%

4-hydroxy-benzaldehyde (123-08-0) + Methylenetriphenylphosphorane (19493-09-5) → 4-Vinylphenol (2628-17-3)

Conditions	Yield
With potassium tert-butylate In tetrahydrofuran at 20℃; for 24h; Wittig Olefination; Green chemistry;	47%

4-Vinylphenol (2628-17-3) + H,ethyl (1-(N-tert-butoxycarbonylamino)-2-phenyl)ethylphosphonate (289506-29-2) → ethyl,4-ethenylphenyl (1-(N-tert-butoxycarbonylamino)-2-phenyl)ethylphosphonate (289506-30-5)

Conditions	Yield
With (benzotriazo-1-yloxy)tris(dimethylamino)phosphonium hexafluorophosphate; triethylamine In dichloromethane Condensation;	100%

perfluoro(2-propoxypropionyl) fluoride (2062-98-8, 125037-08-3) + 4-Vinylphenol (2628-17-3) → C14H7F11O3

Conditions	Yield
With triethylamine In dichloromethane; N,N-dimethyl-formamide at 40℃; for 4h; Inert atmosphere;	99.5%

4-Vinylphenol (2628-17-3) → 4-ethylcyclohexanol (4534-74-1)

Conditions	Yield
With hydrogen In water at 70℃; under 7500.75 Torr; for 8h; Autoclave;	99.2%

4-Vinylphenol (2628-17-3) → 4-Ethylphenol (123-07-9)

Conditions	Yield
With hydrazine hydrate In acetonitrile at 30℃; for 24h;	99%
With hydrogen In methanol at 20℃; for 24h; chemoselective reaction;	93%
Multi-step reaction with 2 steps 1: 1 percent / Nocardia resting cells / aq. phosphate buffer / 48 h / 28 °C / pH 7.0 / Enzymatic reaction 2: Nocardia resting cells / aq. phosphate buffer / 24 h / 28 °C / pH 7.0 / Enzymatic reaction View Scheme

tert-butyldimethylsilyl chloride (18162-48-6) + 4-Vinylphenol (2628-17-3) → 1-[[(1,1-dimethylethyl)dimethylsilyl]oxy]-4-ethenyl benzene (84494-81-5)

Conditions	Yield
With triethylamine In dichloromethane; N,N-dimethyl-formamide at 20℃; for 3h;	99%
In N,N-dimethyl-formamide at 0 - 20℃; for 24h;	34 g

1-bromo-2-(2-methoxyethoxy)ethane (54149-17-6) + 4-Vinylphenol (2628-17-3) → 1-(2-(2-methoxyethoxy)ethoxy)-4-vinylbenzene

Conditions	Yield
Stage #1: 4-Vinylphenol With potassium tert-butylate In acetonitrile for 1h; Reflux; Stage #2: 2-bromoethyl 2-methoxyethyl ether In acetonitrile for 6h; Reflux; Inert atmosphere;	96%
Stage #1: 4-Vinylphenol With potassium tert-butylate In acetonitrile for 1h; Reflux; Stage #2: 2-bromoethyl 2-methoxyethyl ether In acetonitrile for 6h; Inert atmosphere; Reflux;	96%

1-bromo dodecane (112-29-8) + 4-Vinylphenol (2628-17-3) → 1-(decyloxy)-4-vinylbenzene (134322-24-0)

Conditions	Yield
With potassium carbonate In acetone at 60℃; for 12h; Inert atmosphere; Schlenk technique;	96%

2-chloroethyl methyl ether (627-42-9) + 4-Vinylphenol (2628-17-3) → 1-(2-methoxyethoxy)-4-vinylbenzene

Conditions	Yield
Stage #1: 4-Vinylphenol With potassium tert-butylate In acetonitrile for 1h; Reflux; Stage #2: 2-chloroethyl methyl ether In acetonitrile for 6h; Reflux; Inert atmosphere;	95%
Stage #1: 4-Vinylphenol With potassium tert-butylate In acetonitrile for 1h; Stage #2: 2-chloroethyl methyl ether In acetonitrile for 6h; Inert atmosphere;	95%

(trifluoromethyl)trimethylsilane (81290-20-2) + 4-Vinylphenol (2628-17-3) → (4-(2,2-difluorocyclopropyl)phenoxy)trimethylsilane

Conditions	Yield
With sodium iodide In tetrahydrofuran at 65℃; Inert atmosphere;	95%

5-bromoresorcinol (106120-04-1) + 4-Vinylphenol (2628-17-3) → (E)-5-[2-4-(hydroxyphenyl)ethenyl]-1,3-benzenediol (501-36-0)

Conditions	Yield
With {1,3-bis[2,6-bis(propan-2-yl)phenyl]-1,3-dihydro-2H-imidazol-2-ylidene}dichloro(pyridine)palladium; caesium carbonate In neat (no solvent) at 100℃; for 12h; Heck Reaction;	93%

methyl(phenyl)(divinyl)silane (17983-32-3) + 4-Vinylphenol (2628-17-3) → methylphenyl-bis(4-hydroxystyryl)silane

Conditions	Yield
Stage #1: methyl(phenyl)(divinyl)silane; 4-Vinylphenol In dichloromethane at 40℃; for 0.25h; Inert atmosphere; Green chemistry; Stage #2: With Grubbs catalyst first generation In dichloromethane for 8h; Inert atmosphere; Green chemistry;	92.5%

4-Vinylphenol (2628-17-3) + chloroacetyl chloride (79-04-9) → 4-chloroacetoxystyrene (861446-20-0)

Conditions	Yield
With triethylamine In diethyl ether for 2h;	92%
With triethylamine In diethyl ether for 2h;	92%

tert-butyl (4,4-dimethoxycyclohexa-2,5-dien-1-ylidene)carbamate (106501-78-4) + 4-Vinylphenol (2628-17-3) → tert-butyl {3-[2-(4-hydroxyphenyl)-2-methoxyethyl]-4-methoxyphenyl}carbamate

Conditions	Yield
With 1,1'-binaphthyl-2,2'-diyl hydrogenphosphate In toluene at 30℃; for 12h; regioselective reaction;	92%

chloroform (67-66-3) + 4-Vinylphenol (2628-17-3) + acetone (67-64-1) → 2-methyl-2-(4-vinylphenoxy)propionic acid

Conditions	Yield
With tetrabutylammomium bromide; sodium hydroxide at 40℃; Temperature; Reagent/catalyst; Green chemistry;	91.6%

1,2,3-trimethoxybenzene (621-23-8) + 4-Vinylphenol (2628-17-3) → 4-(1-(2,4,6-trimethoxyphenyl)ethyl)phenol

Conditions	Yield
With diphenyl hydrogen phosphate In 1,2-dichloro-ethane at 100℃; for 16h; regiospecific reaction;	91%
With diphenyl hydrogen phosphate In dichloromethane at 100℃; for 22h;	1.22 g

2,2,4,4,6,6-hexachloro-1,3,5-triaza-2,4,6-triphosphorine (940-71-6) + 4-Vinylphenol (2628-17-3) → 2,2,4,4,6,6-hexakis-(4-vinyl-phenoxy)-2λ5,4λ5,6λ5-[1,3,5,2,4,6]triazatriphosphinine

Conditions	Yield
With potassium carbonate In tetrahydrofuran at 20 - 60℃; for 23h;	91%

Upstream product

• 123-07-9 4-Ethylphenol 
• 2628-16-2 p-acetoxystyrene 
• 7400-08-0 p-Coumaric Acid 
• 32568-59-5 4-vinylphenyl benzoate 
• 2446-69-7 p-hexylphenol 
• 100-42-5 styrene 
• 80037-90-7 1,1,3,3-tetramethyl-2,3-dihydro-1H-isoindol-2-yloxoyl radical 
• 637-69-4 4-Methoxystyrene 
• 74-85-1 ethene 
• 540-38-5 p-Iodophenol 
• 1826-67-1 vinyl magnesium bromide 
• 54669-43-1 potassium ethanethiolate 
• 78619-09-7 1-vinylbenzene 3,4-oxide 
• 917-54-4 methyllithium 

Downstream Products

• 32568-59-5 4-vinylphenyl benzoate 
• 16215-47-7 3-(4-vinylphenyloxy)-1-propene 
• 637-69-4 4-Methoxystyrene 
• 289506-30-5 ethyl,4-ethenylphenyl (1-(N-tert-butoxycarbonylamino)-2-phenyl)ethylphosphonate 
• 93781-59-0 (S)-(-)-1-(4'-hydroxyphenyl)ethanol 
• 129830-97-3 (R)-(-)-1-(4'-hydroxyphenyl)ethanol 
• 99-93-4 4-Hydroxyacetophenone 
• 480430-53-3 4-(7-hydroxyheptyloxy)styrene 
• 480430-51-1 4-(5-hydroxypentyloxy)styrene 
• 480430-52-2 4-(6-hydroxyhexyloxy)styrene 
• 170968-59-9 4-(11-hydroxyundecyloxy)styrene 
• 480430-54-4 4-(8-hydroxyoctyloxy)styrene 
• 148652-72-6 4-[4-(4-vinylphenyloxy)butyloxy]-4'-cyanobiphenyl 
• 148652-82-8 4-[9-(4-vinylphenyloxy)nonyloxy]-4'-cyanobiphenyl 

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