Potassium Phosphate, Tribasic → (2-{4,4-Dimethyl-9-oxo-1,10-diazatricyclo[6.4.0.02,6]dodeca-2(6),7-dien-10-yl}-4-(5-{[5-(2-methoxyethyl)-4H,5H,6H,7H-pyrazolo[1,5-a]pyrazin-2-yl]amino}-1,2-dimethyl-6-oxo-1,6-dihydropyridin-3-yl)pyridin-3-yl)methyl Acetate

Participants

Role	Name	HCID	Charge
Reactant	Potassium Phosphate, Tribasic	HCID 62657	—
Reactant	Sodium Acetate	HCID 517045	—
Reactant	(2-(7,7-dimethyl-1-oxo-3,4,7,8-tetrahydro-1H-cyclopenta[4,5]pyrrolo[1,2-a]pyrazin-2(6H)-yl)-4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)pyridin-3-yl)methyl acetate	HCID 86684419	—
Reactant	5-Bromo-3-(5-(2-methoxyethyl)-4,5,6,7-tetrahydropyrazolo[1,5-a]pyrazin-2-ylamino)-1,6-dimethylpyridin-2(1H)-one	HCID 86684590	—
Catalyst	Bis(cyclopenta-1,4-dien-1-yl(diphenyl)phosphane);dichloropalladium;iron(2+)	HCID 178418228	—
Solvent	Acetonitrile--water (1/1)	HCID 18373917	—
Product	(2-{4,4-Dimethyl-9-oxo-1,10-diazatricyclo[6.4.0.02,6]dodeca-2(6),7-dien-10-yl}-4-(5-{[5-(2-methoxyethyl)-4H,5H,6H,7H-pyrazolo[1,5-a]pyrazin-2-yl]amino}-1,2-dimethyl-6-oxo-1,6-dihydropyridin-3-yl)pyridin-3-yl)methyl Acetate	HCID 86684591	45%

Reaction Conditions

Temperature	95 °C

Reaction Steps

A 25-mL single-neck round-bottomed flask equipped with a magnetic stirrer and a reflux condenser was charged with 327e (158 mg, 0.40 mmol), {3-[(acetyloxy)methyl]-2-{4,4-dimethyl-9-oxo-1,10-diazatricyclo[6.4.0.02,6]dodeca-2(6),7-dien-10-yl}pyridin-4-yl}boronic acid 199e (159 mg, 0.40 mmol), K3PO4 (170 mg, 0.80 mmol), sodium acetate (66 mg, 0.80 mmol), Pd(dppf)Cl2 (15 mg, 0.020 mmol), and acetonitrile/water (7/0.5 mL). After three cycles of vacuum/N2 flush, the mixture was heated at 95° C. for 1 h. LCMS analysis showed complete conversion to the desired product. The reaction mixture was cooled to room temperature, and diluted with dichloromethane (50 mL) and water (30 mL). The water layer was extracted with dichloromethane (2×30 mL). The combined organic extract was dried over Na2SO4, filtered, and concentrated under reduced pressure. The dark residue was purified by silica-gel column chromatography eluting with dichloromethane/methanol (80:1 to 30:1) to afford 327f (120 mg, 45%) as a yellow solid. MS-ESI: [M+H]+ 668.8

Provenance & Evidence

DOI	10.6084/m9.figshare.5104873.v1
Patent number	US08921353B2
Source dataset	uspto-grants-2014_12
ORD ID	ord-8aa182d33f5048ddb484909e9d8da249
Source note	uspto-grants-2014_12