Potassium Acetate → 1-Methyl-5-(5-(morpholine-4-carbonyl)pyridin-2-ylamino)-6-oxo-1,6-dihydropyridazin-3-ylboronic Acid

Participants

Role	Name	HCID	Charge
Reactant	Potassium Acetate	HCID 517044	—
Reactant	Bis(pinacolato)diborane	HCID 2733548	—
Reactant	2-Dicyclohexylphosphino-2',4',6'-triisoprophylbiphenyl	HCID 11155794	—
Reactant	6-Chloro-2-methyl-4-({5-[(morpholin-4-yl)carbonyl]pyridin-2-yl}amino)-2,3-dihydropyridazin-3-one	HCID 57662778	—
Catalyst	Bis(cyclopenta-1,4-dien-1-yl(diphenyl)phosphane);dichloropalladium;iron(2+)	HCID 178418228	—
Solvent	1,4-Dioxane	HCID 31275	—
Product	1-Methyl-5-(5-(morpholine-4-carbonyl)pyridin-2-ylamino)-6-oxo-1,6-dihydropyridazin-3-ylboronic Acid	HCID 86684490	83%

Reaction Conditions

Temperature	50 °C

Reaction Steps

A 250-mL single-neck round-bottomed flask equipped with a magnetic stirrer and a reflux condenser was charged with 258a (2.0 g, 5.73 mmol, 1.0 eq.), 4,4,4′,4′,5,5,5′,5′-octamethyl-2,2′-bi(1,3,2-dioxaborolane) (7.56 g, 28.6 mmol, 5.0 eq.), Pd(dppf)Cl2 (465 mg, 0.57 mmol, 0.1 eq.), X-Phos (461 mg, 1.14 mmol, 0.2 eq.), potassium acetate (1.11 g, 11.4 mmol, 2.0 eq.), and dioxane (50 mL). After three cycles of vacuum/argon flush, the mixture was heated at 50° C. for 6 h. It was then cooled to room temperature and filtered. The filtrate was concentrated under reduced pressure and the resulting residue was washed with 1:3 ethyl acetate/petroleum ether to afford 258b (1.70 g, 83%) as a yellow solid, which was used in the next step without further purification. MS: [M+H]+ 360.1

Provenance & Evidence

DOI	10.6084/m9.figshare.5104873.v1
Patent number	US09238655B2
Source dataset	uspto-grants-2016_01
ORD ID	ord-2d9a79f26f384162a4eb9a383eabffd6
Source note	uspto-grants-2016_01