4-Vinylanisol

Bezeichnung:4-Vinylanisol

CAS-Nr637-69-4

Englisch Name:4-Methoxystyrene

CBNumberCB5246416

SummenformelC9H10O

Molgewicht134.18

MOL-Datei637-69-4.mol

Synonyma

4-Vinylanisol

4-Vinylanisol physikalisch-chemischer Eigenschaften

Schmelzpunkt	2°C
Siedepunkt	41-42 °C/0.5 mmHg (lit.)
Dichte	1.009 g/mL at 25 °C (lit.)
Brechungsindex	n20/D 1.562
Flammpunkt	170 °F
storage temp.	Store at <= 20°C.
Löslichkeit	Slightly miscible with methanol.
Aggregatzustand	Liquid
Wichte	1.009
Farbe	Clear colorless to yellow
Geruch (Odor)	sweet
BRN	1098935
LogP	2.874 (est)
CAS Datenbank	637-69-4(CAS DataBase Reference)
NIST chemische Informationen	Benzene, 1-ethenyl-4-methoxy-(637-69-4)
EPA chemische Informationen	Benzene, 1-ethenyl-4-methoxy- (637-69-4)

Sicherheit

S-Sätze:	23-24/25
WGK Germany	3
HS Code	29093090

Gefahreninformationscode (GHS)

4-Methoxystyrene Chemische Eigenschaften,Einsatz,Produktion Methoden

S-Sätze Betriebsanweisung:
S23:Gas/Rauch/Dampf/Aerosol nicht einatmen(geeignete Bezeichnung(en) vom Hersteller anzugeben).
S24/25:Berührung mit den Augen und der Haut vermeiden.
Beschreibung
4-Methoxystyrene (Para-methoxystyrene) is an important chemical raw material, can replace styrene compounds, and is widely applied to various fields such as a light polymerization inhibitor, a material, a medical intermediate, a pesticide, an adhesive, a coating, a sun-screening agent and the like. Besides, the p-methoxystyrene can be used as a polymerization monomer to synthesize polymers with different structures, and the synthesized polymer contains a protecting group which is easily subjected to acidolysis by light so that the p-methoxystyrene can be used as an excellent corrosion-resistant material to be applied to the electronic information industry.
Chemische Eigenschaften
CLEAR COLOURLESS LIQUID
Verwenden
4-Methoxystyrene is employed in the ferric chloride-catalyzed addition of activated methylenes to styrenes. It acts as a monomer in polymerization reactions. Further, it is used to prepare 1,1,2,2-Tetracyano-3-(p-methoxyphenyl)cyclobutane by reacting with ethenetetracarbonitrile.
Synthesis Reference(s)
Chemistry Letters, 13, p. 1897, 1984
The Journal of Organic Chemistry, 52, p. 422, 1987 DOI: 10.1021/jo00379a020
Tetrahedron Letters, 35, p. 8773, 1994 DOI: 10.1016/S0040-4039(00)78494-2
Synthese
The current methods for synthesizing 4-Methoxystyrene mainly comprise:
P-methoxy styrene is prepared by taking p-methoxy benzyl alcohol as a raw material and reacting with triphenylphosphine, formaldehyde and hydrobromic acid through the Wittig reaction.
P-methoxyacetophenone is used as a raw material, reduced to 1- (4-methoxyphenyl) ethanol by potassium borohydride, esterified with excessive potassium bisulfate in cyclohexane to generate sulfonic acid-1- (4-methoxyphenyl) ethyl ester, and finally subjected to elimination reaction to obtain 4-Methoxystyrene.
In 2021, an invention discloses a method for synthesizing 4-methoxystyrene, which comprises the steps of using p-methoxyacetophenone as a raw material, firstly carrying out hydrogenation reduction to generate 1- (4-methoxyphenyl) ethanol, then carrying out dehydration elimination reaction to obtain a crude product, and finally rectifying to obtain the 4-methoxystyrene. The invention adopts a catalytic hydrogenation method to get the intermediate 1- (4-methoxyphenyl) ethanol. The reaction selectivity of the step is excellent and can reach 98-99%, and meanwhile, hydrogen is used as a cleaning gas so that environmental pollution is avoided and industrial production is facilitated.

4-Methoxystyrene Upstream-Materialien And Downstream Produkte

4-Vinylanisol Anbieter Lieferant Produzent Hersteller Vertrieb Händler.

637-69-4, 4-Methoxystyrene Verwandte Suche:

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