1,4-Dioxane → 2-(5-(5-(Azetidin-3-yl)pyridin-2-ylamino)-1-methyl-6-oxo-1,6-dihydropyridin-3-yl)-6-(1-oxo-3,4,6,7,8,9-hexahydropyrazino[1,2-a]indol-2(1H)-yl)benzyl Acetate

Participants

Reaction Conditions

Reaction Steps

In a 44-mL sealed tube equipped with a magnetic stirring bar were placed 3-(5-(azetidin-3-yl)pyridin-2-ylamino)-5-bromo-1-methylpyridin-2(1H)-one 155n (60 mg, 0.18 mmol), 2-(1-oxo-3,4,6,7,8,9-hexahydropyrazino[1,2-a]indol-2(1H)-yl)-6-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)benzyl acetate 114a (110 mg, 0.23 mmol), Pd(PPh3)4 (21 mg, 0.0.18 mmol) in 2 N Na2CO3 (3 mL), DME (2 mL), and dioxane (3 mL). After the reaction mixture was stirred at 100° C. for 14 h., it was partitioned between dichloromethane (5 mL) and water (5 mL), and the organic phase was extracted with dichloromethane (5 mL×3). The combined organic phases were washed with water (5 mL×2) and brine (5 mL×1), dried (Na2SO4), and concentrated. The crude product was purified by flash chromatography (dichloromethane:MeOH, 85:15) to give 40% (40 mg) of 2-(5-(5-(azetidin-3-yl)pyridin-2-ylamino)-1-methyl-6-oxo-1,6-dihydropyridin-3-yl)-6-(1-oxo-3,4,6,7,8,9-hexahydropyrazino[1,2-a]indol-2(1H)-yl)benzyl acetate 151a as a solid.

Provenance & Evidence