(R)-1-(2,6-Dichloro-3-fluorophenyl)ethanol Chemical Properties

Melting point:

41.0 to 45.0 °C

Boiling point:

261 °C

Density 

1.406

Flash point:

112 °C

storage temp. 

2-8°C

solubility 

soluble in Methanol

form 

powder to crystal

pka

13.30±0.20(Predicted)

color 

White to Almost white

InChI

InChI=1/C8H7Cl2FO/c1-4(12)7-5(9)2-3-6(11)8(7)10/h2-4,12H,1H3/t4-/s3

InChIKey

JAOYKRSASYNDGH-SCSAIBSYSA-N

SMILES

C1([C@@H](C)O)=C(Cl)C=CC(F)=C1Cl |&1:1,r|

Safety Information

HS Code 

2906.29.6000

HazardClass 

IRRITANT

(R)-1-(2,6-Dichloro-3-fluorophenyl)ethanol Usage And Synthesis

Description

(R)-1-(2,6-Dichloro-3-fluorophenyl)ethanol is an alcohol derivative and can be used as a pharmaceutical intermediate.

Uses

(R)-1-(2,6-Dichloro-3-fluorophenyl)ethanol is used in the synthesis of anti-tumor molecular targeted drug of Crizotinib (C785000).

Synthesis

1. Primary crystallization: 30 g of 1-(2,6-dichloro-3-fluorophenyl)ethanol was dissolved in 105 mL of petroleum ether and heated and stirred under argon protection for 40 minutes until complete dissolution. (R)-1-(2,6-dichloro-3-fluorophenyl)ethanol crystal seed was added, and the crystal seed was observed to become smaller after 45 min; the crystal seed completely disappeared after 1 h; a white solid precipitate precipitated after 3.5 h (precipitated to the bottom); the reaction was stopped after 10 h, and no further separation was required. Filtration and drying gave 22 g of product in 73.3% yield. The enantiomeric excess (ee) was 62.5% as detected by chiral chromatography. 2. Secondary crystallization: 30 g of the primary crystallization product was dissolved in 105 mL of petroleum ether and heated and stirred under argon protection for 45 min until complete dissolution. Add (R)-1-(2,6-dichloro-3-fluorophenyl)ethanol crystalline seed, after 45 minutes, the crystalline seed was observed to become smaller; after 1 hour, the crystalline seed completely disappeared; after 3.5 hours, a white solid precipitate precipitated (precipitated to the bottom); after 10 hours, the reaction was stopped, and there was no need for further separation. Filtration and drying gave 22 g of product in 73.3% yield. The enantiomeric excess (ee) was 95.0% by chiral chromatography. 3. Tertiary crystallization: 30 g of the secondary crystallization product was dissolved in 105 mL of petroleum ether and heated and stirred under argon protection for 40 min until complete dissolution. 45 min later, (R)-1-(2,6-dichloro-3-fluorophenyl)ethanol crystals were added; the crystals disappeared completely after 1 h; a white solid precipitate precipitated (to the bottom of the precipitate) after 3.5 h; the reaction was stopped after 10 h, and there was no need for further separation. The reaction was stopped after 10 hours without further separation. The reaction was stopped after 10 hours without further separation. 23 g of the product was obtained by filtration and drying, with a yield of 76.7%. The enantiomeric excess (ee) was 99.6% by chiral chromatography.

References

[1] Patent: CN105237346, 2016, A. Location in patent: Paragraph 0062; 0063; 0064; 0065; 0066; 0067; 0068-0069
[2] Patent: WO2012/48259, 2012, A2. Location in patent: Page/Page column 37
[3] Patent: WO2012/48258, 2012, A2. Location in patent: Page/Page column 30
[4] Patent: WO2013/17989, 2013, A1

(R)-1-(2,6-Dichloro-3-fluorophenyl)ethanol(330156-50-8)Related Product Information

• Ethanol
• Dichlorodiphenylsilane
• 2-Fluoroethanol
• Phenethyl alcohol
• Ethyl acetate
• 2,2,2-TRIFLUOROETHANOL-D3
• Dichloromethylphenylsilane
• Dichlorofluoroethane
• 2,6-Dichloro-3-fluoroacetophenone
• (S)-1-(2,6-Dichloro-3-fluorophenyl)ethanol
• 1-(2,6-DICHLOROPHENYL)ETHANOL
• 1-(2,6-DICHLORO-3-FLUOROPHENYL)ETHANOL
• (R)-1-(2,6-Dichloro-3-fluorophenyl)ethanol