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HuagongsheHuagongshe Chemistry Print Report · For research reference only
HRID 883576Generated: October 30, 2026

Hydrochloric Acid → Methyl 5-({2-amino-5-[(4-methyl-1-piperazinyl)methyl]phenyl}amino)-3-({(1R)-1-[2-(trifluoromethyl)phenyl]ethyl}oxy)-2-thiophenecarboxylate

https://huagongshe.com/reaction/883576

Reaction equation

Participants

RoleNameHCIDCharge
ReactantHydrochloric AcidHCID 313—
ReactantTrimethyl orthoformateHCID 9005—
Reactant(R)-Methyl 5-((5-((4-methylpiperazin-1-yl)methyl)-2-nitrophenyl)amino)-3-(1-(2-(trifluoromethyl)phenyl)ethoxy)thiophene-2-carboxylateHCID 44185548—
CatalystPalladiumHCID 23938—
SolventTolueneHCID 1140—
ProductMethyl 5-({2-amino-5-[(4-methyl-1-piperazinyl)methyl]phenyl}amino)-3-({(1R)-1-[2-(trifluoromethyl)phenyl]ethyl}oxy)-2-thiophenecarboxylateHCID 57538942—

Reaction Steps

A mixture of methyl 5-({5-[(4-methyl-1-piperazinyl)methyl]-2-nitrophenyl}amino)-3-({(1R)-1-[2-(trifluoromethyl)phenyl]ethyl}oxy)-2-thiophenecarboxylate (0.24 g, 0.415 mmol), 5% Pd/C (0.144 g), HCl (1.25 M in MeOH, 0.034 mL, 0.043 mmol), trimethylorthoformate (1.66 mL, 15.2 mmol) in toluene (0.58 mL) was hydrogenated under a H2 atmosphere at 1.1 bar pressure overnight. The vessel was purged with N2 and the reaction mixture was analysed by HPLC to confirm presence of the title compound which was not purified, but used crude in the next step. LRMS found m/z [ES+] 549.

Provenance & Evidence

DOI10.6084/m9.figshare.5104873.v1
Patent numberUS08236954B2
Source datasetuspto-grants-2012_08
ORD IDord-8b5f1db41e784fa4804b6a06661a95ed
Source noteuspto-grants-2012_08