Cesium carbonate → 5-Bromo-3-(5-(4-Ethylpiperazin-1-yl)pyridin-2-ylamino)-1-methylpyridin-2(1H)-one

https://huagongshe.com/reaction/1918873

Participants

Role	Name	HCID	Charge
Reactant	Cesium carbonate	HCID 10796	—
Reactant	1,1'-(9,9-Dimethyl-9H-xanthene-4,5-diyl)bis(1,1-diphenylphosphine)	HCID 636044	—
Reactant	3,5-Dibromo-1-methylpyridin-2(1H)-one	HCID 3614350	—
Reactant	5-(4-Ethylpiperazin-1-yl)pyridin-2-amine	HCID 28411599	—
Catalyst	Bis(dibenzylideneacetone)palladium	HCID 9811564	—
Solvent	Dichloromethane	HCID 6344	—
Solvent	1,4-Dioxane	HCID 31275	—
Product	5-Bromo-3-(5-(4-Ethylpiperazin-1-yl)pyridin-2-ylamino)-1-methylpyridin-2(1H)-one	HCID 58043646	—

Reaction Conditions

Temperature	100 °C

Reaction Steps

To a round-bottomed flask equipped with a stirring bar, 138b (2.52 g, 12.22 mmol), 3,5-dibromo-1-methylpyridin-2(1H)-one (4.89 g, 18.32 mmol), Pd2(dba)3 (1.12 g, 1.22 mmol), XantPhos (1.13 mg, 1.96 mmol), Cs2CO3 (13.14 g, 40.33 mmol) and dioxane (50 mL) were added. The reaction mixture was heated at 100° C. overnight. CH2Cl2 (200 mL) was added to the resulting mixture was washed with water (30 mL×3). CH2Cl2 (200 mL) was added and the resulting mixture was washed with water (30 mL×3), brine (30 mL×1), dried over MgSO4, filtered, and removed solvent in vacuo. CH2Cl2/ether (1:2, 5 mL) was added followed by sonication, the precipitation was filtered as 138c, a yellow solid, 2.718 g (57%).

Provenance & Evidence

DOI	10.6084/m9.figshare.5104873.v1
Patent number	US08618107B2
Source dataset	uspto-grants-2013_12
ORD ID	ord-a91ff44924d944828948e72bed728689
Source note	uspto-grants-2013_12