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HuagongsheHuagongshe Chemistry Print Report · For research reference only
HRID 926379Generated: November 2, 2026

Potassium Carbonate → HCID 83826394, compound

https://huagongshe.com/reaction/926379

Reaction equation

Participants

RoleNameHCIDCharge
ReactantPotassium CarbonateHCID 11430—
ReactantAmmonium ChlorideHCID 25517—
ReactantSodium borohydrideHCID 4311764—
Reactant5-Methoxypyrazine-2-carbonitrileHCID 53438993—
ReactantHCID 178418573HCID 178418573—
SolventTetrahydrofuranHCID 8028—
ProductHCID 83826394HCID 838263944.4%

Reaction Conditions

Temperature25 °C

Reaction Steps

To a solution of 5-methoxy-pyrazine-2-carbonitrile (1.0 g, 7.4 mmol) in tetrahydrofuran at −78° C. was added dropwise 1 M methylmagnesium bromide (8.14 ml, 8.14 mmol) and the mixture was stirred for 1 h at 25° C. Sodium borohydride (250 mg, 6.62 mmol) was added at −78° C. and the mixture was allowed to warm to 25° C. Aqueous ammonium chloride was added and after addition of excess potassium carbonate the mixture was extracted 3 times with dichloromethane, solvents were evaporated to give 0.05 g (4%) of crude 1-(5-methoxy-pyrazin-2-yl)-ethylamine. LC/MS (method 5): Rt=1.26 min; m/z=154.15 (M+H+).

Provenance & Evidence

DOI10.6084/m9.figshare.5104873.v1
Patent numberUS09284333B2
Source datasetuspto-grants-2016_03
ORD IDord-51cec6153e5848f694da46ba6046785f
Source noteuspto-grants-2016_03