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0 °C

To a stirred solution of 3-nitro-quinolin-4-ol (5 g) in DCM (70 mL) was added DMF (2.3 mL) then thionyl chloride (2.1 mL) and the reaction mixture was refluxed for 3 h. The solution was cooled to 0° C. and 3-{[tert-butyl(dimethyl)silyl]oxy}propan-1-amine (6 g) was added followed by dropwise addition of Et3N (12 mL). The reaction mixture was stirred at rt for 2 h, then partitioned between DCM and saturated NaHCO3 solution. The organic layer was washed with water, dried, and the solvent evaporated under reduced pressure. The residue was triturated with iso-hexane to leave the subtitle compound (8.7 g).

1. custompartitioned between DCM and saturated NaHCO3 solution
2. washThe organic layer was washed with water
3. customdried
4. customthe solvent evaporated under reduced pressure
5. customThe residue was triturated with iso-hexane