Back
HuagongsheHuagongshe Chemistry Print Report · For research reference only
HRID 1983021Generated: October 30, 2026

Thionyl Chloride → 4-chloro-1-(chloromethyl)-1H-pyrazole hydrochloride

https://huagongshe.com/reaction/1983021

Reaction equation

Participants

RoleNameHCIDCharge
ReactantThionyl ChlorideHCID 24386—
Reactant(4-chloro-1H-pyrazol-1-yl)methanolHCID 7017837—
SolventDichloromethaneHCID 6344—
Product4-chloro-1-(chloromethyl)-1H-pyrazole hydrochlorideHCID 23149119—

Reaction Steps

2.73 g of 4-chloro-1H-pyrazole-1-ylmethanol was dissolved to 20 ml of dichloromethane. 4.4 ml of thionyl chloride was added to the solution, followed by stirring at room temperature for overnight. The reaction mixture was concentrated under reduced pressure to obtain 2.90 g of 4-chloro-1-(chloromethyl)-1H-pyrazole hydrochloride.

Provenance & Evidence

DOI10.6084/m9.figshare.5104873.v1
Patent numberUS07541374B2
Source datasetuspto-grants-2009_06
ORD IDord-4ba79de6830f453fbdf6b7841f6f2834
Source noteuspto-grants-2009_06