3-CHLORO-4-HYDROXYBENZONITRILE

3-CHLORO-4-HYDROXYBENZONITRILE Property

Melting point:

150 °C

Boiling point:

266℃

Density 

1.41

Flash point:

115℃

storage temp. 

Inert atmosphere,Room Temperature

form 

powder to crystal

pka

6.37±0.18(Predicted)

color 

White to Light yellow

InChI

InChI=1S/C7H4ClNO/c8-6-3-5(4-9)1-2-7(6)10/h1-3,10H

InChIKey

CRYPJUOSZDQWJZ-UHFFFAOYSA-N

SMILES

C(#N)C1=CC=C(O)C(Cl)=C1

CAS DataBase Reference

2315-81-3(CAS DataBase Reference)

Safety

Hazard Codes 

Xi

Risk Statements 

20/21/22-36/37/38

Safety Statements 

26-36/37/39

RIDADR 

3276

Hazard Note 

Irritant

HazardClass 

6.1

PackingGroup 

III

HS Code 

2926907090

Hazard and Precautionary Statements (GHS)

Symbol(GHS)

Signal word

Warning

Hazard statements

H302Harmful if swallowed

H315Causes skin irritation

H319Causes serious eye irritation

H335May cause respiratory irritation

Precautionary statements

P305+P351+P338IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continuerinsing.

3-CHLORO-4-HYDROXYBENZONITRILE Chemical Properties,Usage,Production

Chemical Properties

off-white crytalline

Synthesis

General procedure for the synthesis of 3-chloro-4-hydroxybenzonitrile from 3-chloro-4-methoxybenzonitrile: To a solution of 3-chloro-4-methoxybenzonitrile (4.25 g) in dichloromethane (DCM, 85 mL) was added slowly and dropwise at -78 °C a dichloromethane solution (50.7 mL) of 1 M boron tribromide (BBr3). The reaction mixture was stirred at -78 °C for 10 min and then moved to room temperature to continue stirring overnight. Subsequently, the reaction mixture was heated to 40 °C and stirred for 4.5 days, during which time additional boron tribromide solution (26 mL) was added on the first, second and third days, respectively. Upon completion of the reaction, the reaction mixture was carefully quenched with water and the solid precipitate was collected by filtration. The aqueous and organic layers were separated, the aqueous layer was washed with dichloromethane and the organic phases were combined. The organic layer was dried with anhydrous magnesium sulfate (MgSO4), filtered and concentrated under reduced pressure. The crude product was purified by column chromatography (Büchi Sepacore system, 50 g silica gel column, solvent A: heptane, solvent B: ethyl acetate (EA), gradient elution (solvent B was increased from 0% to 40%) at a flow rate of 30 mL/min), yielding 3.17 g of brown oily product. Liquid chromatography-mass spectrometry (LC-MS) analysis (Condition A): retention time (tR) = 0.68 min; [M + H]+ peak was not detected.

References

[1] Patent: WO2015/75025, 2015, A1. Location in patent: Page/Page column 93
[2] Patent: WO2015/75023, 2015, A1. Location in patent: Page/Page column 139