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HuagongsheHuagongshe Chemistry Print Report · For research reference only
HRID 2237643Generated: October 29, 2026

1-(4-Amino-3-fluorophenyl)pyrazin-2(1H)-one → 3-{[(5-chloro-thiophene-2-carbonyl)-amino]-methyl}-[1,2,4]oxadiazole-5-carboxylic acid [2-fluoro-4-(2-oxo-2H-pyrazine-1-yl)-phenyl]-amide

https://huagongshe.com/reaction/2237643

Reaction equation

Participants

RoleNameHCIDCharge
Reactant1-(4-Amino-3-fluorophenyl)pyrazin-2(1H)-oneHCID 23086774—
Reactant3-{[(5-Chloro-thiophene-2-carbonyl)-amino]-methyl}-[1,2,4]oxadiazole-5-carboxylic acid ethyl esterHCID 59302956—
Product3-{[(5-chloro-thiophene-2-carbonyl)-amino]-methyl}-[1,2,4]oxadiazole-5-carboxylic acid [2-fluoro-4-(2-oxo-2H-pyrazine-1-yl)-phenyl]-amideHCID 24967630—

Reaction Steps

In analogy to example 1E 3-{[(5-chloro-thiophene-2-carbonyl)-amino]-methyl}-[1,2,4]oxadiazole-5carboxylic acid ethyl ester (example 1D) was reacted with 1-(4-amino-3-fluoro-phenyl)-pyrazine-2-one (CAS 863015-77-4) to give 3-{[(5-chloro-thiophene-2-carbonyl)-amino]-methyl}-[1,2,4]oxadiazole-5-carboxylic acid [2-fluoro-4-(2-oxo-2H-pyrazine-1-yl)-phenyl]-amide. Yellow solid. MS 475.0 ([M+H]−)

Provenance & Evidence

DOI10.6084/m9.figshare.5104873.v1
Patent numberUS07718679B2
Source datasetuspto-grants-2010_05
ORD IDord-4b7f658ec16048299aca9d0f0231a21b
Source noteuspto-grants-2010_05