3,4,5-Trifluorophenylboronic acid

Bezeichnung:3,4,5-Trifluorophenylboronic acid

CAS-Nr143418-49-9

Englisch Name:3,4,5-Trifluorophenylboronic acid

CBNumberCB6481302

SummenformelC6H4BF3O2

Molgewicht175.9

MOL-Datei143418-49-9.mol

3,4,5-Trifluorophenylboronic acid physikalisch-chemischer Eigenschaften

Schmelzpunkt	290-295 °C (lit.)
Siedepunkt	263.6±50.0 °C(Predicted)
Dichte	1,087g/cm
Brechungsindex	1,423-1,425
storage temp.	Keep in dark place,Sealed in dry,Room Temperature
Löslichkeit	18.43g/l
pka	6.54±0.11(Predicted)
Aggregatzustand	Powder
Farbe	Tan
BRN	7371914
InChIKey	UHDDEIOYXFXNNJ-UHFFFAOYSA-N
CAS Datenbank	143418-49-9(CAS DataBase Reference)

Sicherheit

Kennzeichnung gefährlicher	N-Xn,Xi
R-Sätze:	51/53-36-22-36/37/38
S-Sätze:	61-26-37/39-36
RIDADR	3077
WGK Germany	3
HazardClass	IRRITANT
HS Code	29163990

Gefahreninformationscode (GHS)

3,4,5-Trifluorophenylboronic acid Chemische Eigenschaften,Einsatz,Produktion Methoden

R-Sätze Betriebsanweisung:
R51/53:Giftig für Wasserorganismen, kann in Gewässern längerfristig schädliche Wirkungen haben.
R36:Reizt die Augen.
R22:Gesundheitsschädlich beim Verschlucken.
R36/37/38:Reizt die Augen, die Atmungsorgane und die Haut.
S-Sätze Betriebsanweisung:
S61:Freisetzung in die Umwelt vermeiden. Besondere Anweisungen einholen/Sicherheitsdatenblatt zu Rate ziehen.
S26:Bei Berührung mit den Augen sofort gründlich mit Wasser abspülen und Arzt konsultieren.
S37/39:Bei der Arbeit geeignete Schutzhandschuhe und Schutzbrille/Gesichtsschutz tragen.
S36:DE: Bei der Arbeit geeignete Schutzkleidung tragen.
Beschreibung
3,4,5-Trifluorophenylboronic acid is an arylboronic acid compound used in organic synthesis and as a reaction reagent. It can be used as a catalyst to catalyse the direct amidation of amino acid derivatives and the direct polycondensation of carboxylic acids and amines; it can also be used in the formation of new 1:1 co-crystals with urea C6H4BF3O2-CH4N2O components.
Chemische Eigenschaften
Tan powder
Verwenden
Reactant involved in:
- Preparation of phenylboronic catechol esters and determination of Lewis acidity
- Synthesis of benzopyranone derivatives as GABAA receptor modulators
- Synthesis of multisubstituted olefins and conjugate dienes
- Suzuki cross-coupling reactions
- Preparation of fluorinated aromatic poly(ether-amide)s
Verwenden
suzuki reaction
Verwenden
Intermediates of Liquid Crystals
Synthese
Add 42mmol (10.08g) of magnesium chips into a 1000mL four-necked flask, add 2 pieces of iodine, and then add 200mL of anhydrous 2-methyltetrahydrofuran, heat the temperature to 50°C, and then slowly let it cool down to 40°C. And then drip 4-5mL of 3,4,5-trifluorobromobenzene 84.4g (0.4mol) and 50mL 2-methyltetrahydrofuran mixed solution, trigger the Grignard reaction, the temperature will rise rapidly after the reaction is initiated, use The temperature is lowered to 10-15°C in an ice-water bath, and a mixture (1) composed of 3,4,5-trifluorobromobenzene 84.4g (0.4mol) and 50mL 2-methyltetrahydrofuran (1), trimethyl borate is added dropwise. A mixture of 44 grams (0.42 mol) of ester and 50 mL of 2-methyltetrahydrofuran (2).The speed of the mixed solution (1) and the mixed solution (2) is kept the same, the dropping speed is controlled, and the dropping temperature is kept at 10-15°C . After the dropping is completed, the reaction is continued at room temperature for 8 hours.After the reaction is over, the reaction solution is slowly poured into dilute hydrochloric acid, and after the addition is complete, stir for 0.5-1.5h, separate the liquids, and then extract the aqueous phase twice, combine the organic phases, dry with anhydrous sodium sulfate, spin dry, and Recrystallization of ethyl chloride gave 3,4,5-Trifluorophenylboronic acid with a yield of 78% and a content of 99.6%.

3,4,5-Trifluorophenylboronic acid Upstream-Materialien And Downstream Produkte

3,4,5-Trifluorophenylboronic acid Anbieter Lieferant Produzent Hersteller Vertrieb Händler.

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