1-(Chloromethyl)-2,3,4,5,6-pentafluorobenzene

Name	Pentafluorobenzyl chloride
Synonyms	Pentafluorobenzyl chloride PENTAFLUOROBENZYL CHLORIDE (chloromethyl)pentafluorobenzene 2,3,4,5,6-Pentafluorobenzylchloride 2,3,4,5,6-PENTAFLUOROBENZYL CHLORIDE 2,3,4,5,6-Pentafluorobenzyl chloride à-chloro-2,3,4,5,6-pentafluorotoluene alpha-Chloro-2,3,4,5,6-pentafluorotoluene 1-Chloromethyl-2,3,4,5,6-Pentafluoro-Benzene 1-(Chloromethyl)-2,3,4,5,6-pentafluorobenzene
CAS	653-35-0
EINECS	211-501-0
InChI	InChI=1/C7H2ClF5/c8-7(12,13)3-1-2-4(9)6(11)5(3)10/h1-2H

Hazard Symbols	Xi - Irritant
Risk Codes	34 - Causes burns
Safety Description	S26 - In case of contact with eyes, rinse immediately with plenty of water and seek medical advice. S36/37/39 - Wear suitable protective clothing, gloves and eye/face protection. S45 - In case of accident or if you feel unwell, seek medical advice immediately (show the label whenever possible.)
UN IDs	2927
Hazard Note	Irritant/Lachrymatory
Hazard Class	6.1
Packing Group	II

use	2,3,4,5, 6-pentafluorobenzyl chloride can be used as an intermediate in pharmaceutical synthesis, can be prepared by the reaction of hexafluorobenzene and methyl lithium, and can be used to prepare 2,3,4,5, 6-pentafluorobenzyl cyanide.
preparation	add an ether solution of methyl lithium (70cc, containing 21g of methyl lithium) to hexafluorobenzene (20g) in the dry ether (20cc) at a rate sufficient to maintain mild reflux, stir, after adding and adding water (100cc), keep stirring for one hour. The ether layer was dried (MgSO4), filtered, and most of the ether was distilled off by a 6-inch column, and the residual liquid (17g) was separated, and 2,3,4,5, 6-pentafluorotoluene (138g) was obtained by gas chromatograph 100 (column 488 cmx75mm, filled with silicone rubber/diatomite 1:3, temperature 1000°C, no flow 451/hr). The methyl halogenation is then reacted with one molecular equivalent of sulfonyl chloride in the presence of 0005 molecular equivalent of dibenzoyl peroxide. The main product is 2,3,4,5, 6-pentafluorobenzyl chloride, boiling point 88-90°C, mercury pressure 69mm.
NIST chemical information	information provided by: webbook.nist.gov (external link)

Last Update：2024-04-09 02:00:00