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HuagongsheHuagongshe Chemistry Print Report · For research reference only
HRID 1758918Generated: November 3, 2026

Hydrochloric Acid → 6-Amino-1-ethyl-5-nitroso-1,3-dihydropyrimidine-2,4-dione

https://huagongshe.com/reaction/1758918

Reaction equation

Participants

RoleNameHCIDCharge
ReactantHydrochloric AcidHCID 313—
Reactant6-Amino-1-ethyl-1,2,3,4-tetrahydropyrimidine-2,4-dioneHCID 853899—
ReactantSodium NitriteHCID 23668193—
SolventWaterHCID 962—
Product6-Amino-1-ethyl-5-nitroso-1,3-dihydropyrimidine-2,4-dioneHCID 300509—

Reaction Steps

To 100 g (0.65 mol) of 6-amino-1-ethyl-2,4-(1H,3H)-pyrimidinedione (II), dissolved in 1 liter hot water, was added 145 ml of 5 N HCl and 50 g of NaNO2 (0.72 mol) which was dissolved in water. After cooling the red crystals were filtered off and washed with water. Yield 97.7 g (83%) (III) NMR.

Provenance & Evidence

DOI10.6084/m9.figshare.5104873.v1
Patent numberUS04338319
Source datasetuspto-grants-1982_07
ORD IDord-86551b63bed64c08a05597d55afd581e
Source noteuspto-grants-1982_07