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HuagongsheHuagongshe Chemistry Print Report · For research reference only
HRID 230125Generated: October 25, 2026

Aminopyrazine → 5-(2-(1-methyl-1H-indol-3-yl)imidazo[1,2-a]pyrazin-3-ylamino)-2,3-dihydroinden-1-one

https://huagongshe.com/reaction/230125

Reaction equation

Participants

RoleNameHCIDCharge
ReactantAminopyrazineHCID 78747—
Reactant1-Methyl-1H-indole-3-carbaldehydeHCID 87894—
Reactant5-Isocyano-2,3-dihydroinden-1-oneHCID 18719813—
CatalystScandium(III) triflateHCID 2734571—
SolventDichloromethane methanolHCID 21226129—
Product5-(2-(1-methyl-1H-indol-3-yl)imidazo[1,2-a]pyrazin-3-ylamino)-2,3-dihydroinden-1-oneHCID 11965641—

Reaction Steps

5-Isocyano-2,3-dihydroinden-1-one (6) (60.0 mg, 379 μmol) was combined with pyrazin-2-amine (12) (36.1 mg, 379 μmol), 1-methyl-1H-indole-3-carbaldehyde (15) (60.4 mg, 379 μmol) and Sc(OTf)3 (18.7 mg, 37.9 μmol) in DCM/MeOH and stirred at room temperature overnight. The solvent was evaporated and purified by silica using 2% MeOH/EtOAc to provide 5-(2-(1-methyl-1H-indol-3-yl)imidazo[1,2-a]pyrazin-3-ylamino)-2,3-dihydroinden-1-one (16). MS (APCI) m/z (M+1)

Provenance & Evidence

DOI10.6084/m9.figshare.5104873.v1
Patent numberUS07566716B2
Source datasetuspto-grants-2009_07
ORD IDord-28ca106c0b57480d89a242c3d18c7b5f
Source noteuspto-grants-2009_07