Ethoxyacetyl chloride → 1-{[3-Amino-6-(benzyloxy)quinolin-4-yl]amino}-2-methylpropan-2-ol

Participants

Reaction Steps

1-{[3-Amino-6-(benzyloxy)quinolin-4-yl]amino}-2-methylpropan-2-ol was prepared according to the general methods described in Parts A and B of Example 54 using 6-benzyloxy-4-chloro-3-nitroquinoline in lieu of 7-benzyloxy-4-chloro-3-nitroquinoline in Part A. Ethoxyacetyl chloride (5.37 g, 43.8 mmol) was added to a solution of 1-{[3-amino-6-(benzyloxy)quinoline-4-yl]amino}-2-methylpropan-2-ol (7.45 g, 22.1 mmol) in acetonitrile (230 mL), and the reaction was stirred overnight. The solvent was removed under reduced pressure, and the residue was dissolved in dichloromethane. The resulting solution was washed with aqueous sodium bicarbonate, dried over magnesium sulfate, filtered, and concentrated under reduced pressure. The residue was purified by column chromatography on a HORIZON HPFC system (an automated, modular high-performance flash purification product available from Biotage, Inc, Charlottesville, Va., USA) (silica gel cartridge, eluting with dichloromethane:methanol ranging in ratios from 98:2 to 95:5) to provide N-{6-benzyloxy-4-[(2-hydroxy-2-methylpropyl)amino]quinolin-3-yl}-2-ethoxyacetamide hydrochloride.

Provenance & Evidence