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HuagongsheHuagongshe Chemistry Print Report · For research reference only
HRID 968320Generated: October 29, 2026

Dichloromethane → 5-(5-amino-2-thienyl)-1-methyl-3-trifluoromethyl-1H-pyrazole hydrochloride

https://huagongshe.com/reaction/968320

Reaction equation

Participants

RoleNameHCIDCharge
ReactantDichloromethaneHCID 6344—
ReactantTrifluoroacetic acidHCID 6422—
Reactanttert-butyl 5-(1-methyl-3-trifluoromethyl-1H-pyrazol-5-yl)thiophene-2-carbamateHCID 22288380—
Product5-(5-amino-2-thienyl)-1-methyl-3-trifluoromethyl-1H-pyrazole hydrochlorideHCID 22288392—

Reaction Steps

A mixture of tert-butyl 5-(1-methyl-3-trifluoromethyl-1H-pyrazol-5-yl)thiophene-2-carbamate, trifluoroacetic acid and dichloromethane was stirred at room temperature for 2 days and then subjected to purification and salt formation in the usual way to give 5-(5-amino-2-thienyl)-1-methyl-3-trifluoromethyl-1H-pyrazole hydrochloride as light yellow powder crystals.

Provenance & Evidence

DOI10.6084/m9.figshare.5104873.v1
Patent numberUS06958339B2
Source datasetuspto-grants-2005_10
ORD IDord-e87430892d764656801414f138b6f863
Source noteuspto-grants-2005_10