1,2-Dimethoxyethane → tert-Butyl 2-(5-(2-(Acetoxymethyl)-3-(1-oxo-3,4,6,7,8,9-hexahydro-pyrazino[1,2-a]indol-2(1H)-yl)phenyl)-1-methyl-2-oxo-1,2-dihydropyridin-3-ylamino)-7,8-dihydro-1,6-naphthyridine-6(5H)-carboxylate

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Reaction Steps

To a microwave tube equipped with a stirring bar, tert-butyl 2-(5-bromo-1-methyl-2-oxo-1,2-dihydropyridin-3-ylamino)-7,8-dihydro-1,6-naphthyridine-6(5H)-carboxylate 158c (300 mg, 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 (352 mg, 0.758 mmol), Pd(PPh3)4 (39.8 mg, 0.035 mmol), Na2CO3 aqueous solution (1.0 N, 2.27 mL, 2.27 mmol), and 1,2-dimethoxyethane (3.5 mL) were added. The mixture was reacted in microwave at 130° C. for 10 min. methylene chloride (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. Silica gel column chromatography (methanol:methylene chloride=5:95) gave 166a.

Provenance & Evidence