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HuagongsheHuagongshe Chemistry Print Report · For research reference only
HRID 2086820Generated: October 30, 2026

Sodium Bicarbonate → 2-Methyl-4-(3-aminophenyl)-3-oxo-3,4-dihydropyrido[2,3-b]pyrazine

https://huagongshe.com/reaction/2086820

Reaction equation

Participants

RoleNameHCIDCharge
ReactantSodium BicarbonateHCID 516892—
Reactant2-Methyl-4-(3-acetamidophenyl)-3-oxo-3,4-dihydropyrido[2,3-b]pyrazineHCID 22724197—
SolventHydrochloric AcidHCID 313—
Product2-Methyl-4-(3-aminophenyl)-3-oxo-3,4-dihydropyrido[2,3-b]pyrazineHCID 22723994100.4%

Reaction Steps

The suspension of 2-methyl-4-(3-acetamidophenyl)-3-oxo-3,4-dihydropyrido[2,3-b]pyrazine (8.6 g) in 3N hydrochloric acid (50 ml) was refluxed for an hour. The mixture was made basic by sodium bicarbonate (15 g) to obtain 2-methyl-4-(3-aminophenyl)-3-oxo-3,4-dihydropyrido[2,3-b]pyrazine (7.4 g) in yellow powder.

Provenance & Evidence

DOI10.6084/m9.figshare.5104873.v1
Patent numberUS06727245B2
Source datasetuspto-grants-2004_04
ORD IDord-1ec11489a9c4418ca17b989498132347
Source noteuspto-grants-2004_04