Sodium Carbonate → 4-Ethyl-6-(4-(4-(tetrahydro-2H-pyran-2-yl)-4H-1,2,4-triazol-3-yl)phenyl)-3,4-dihydro-pyrazino[2,3-b]pyrazin-2(1H)-one

Participants

Role	Name	HCID	Charge
Reactant	Sodium Carbonate	HCID 10340	—
Reactant	4-(tetrahydro-2H-pyran-2-yl)-3-(4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)phenyl)-4H-1,2,4-triazole	HCID 58298305	—
Reactant	6-Bromo-4-ethyl-3,4-dihydropyrazino[2,3-b]pyrazin-2(1H)-one	HCID 86644654	—
Catalyst	Bis(cyclopenta-1,4-dien-1-yl(diphenyl)phosphane);dichloropalladium;iron(2+)	HCID 178418228	—
Solvent	Water	HCID 962	—
Solvent	1,4-Dioxane	HCID 31275	—
Product	4-Ethyl-6-(4-(4-(tetrahydro-2H-pyran-2-yl)-4H-1,2,4-triazol-3-yl)phenyl)-3,4-dihydro-pyrazino[2,3-b]pyrazin-2(1H)-one	HCID 66607150	45%

Reaction Conditions

Temperature	120 °C

Reaction Steps

6-Bromo-4-ethyl-3,4-dihydropyrazino[2,3-b]pyrazin-2(1H)-one (1.1 equiv), 4-(tetrahydro-2H-pyran-2-yl)-3-(4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)phenyl)-4H-1,2,4-triazole (1 equiv) and dichloro[1,1′-bis(diphenylphosphino)ferrocene]palladium (II) dichloromethane (0.05 equiv) were combined in 1,4-dioxane followed by the addition of sodium carbonate (3 equiv) in water. The solution was heated in a Biotage Emrys Optimizer microwave reactor to 120° C. for 30 min. The solution was condensed under reduced pressure and purified using column chromatography (0-10% methanol in ethyl acetate) to afford the title compound in 45% yield. MS (ESI) m/z 406.6 [M+1]+.

Provenance & Evidence

DOI	10.6084/m9.figshare.5104873.v1
Patent number	US08507492B2
Source dataset	uspto-grants-2013_08
ORD ID	ord-074e5f3581a348d0be230ac8906922bf
Source note	uspto-grants-2013_08