2-Amino-2-methyl-1-propanol → 4-tert-Butyl-N-(2-hydroxy-1,1-dimethyl-ethyl)-benzamide

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A solution of 101a in DCM (200 mL) was added to a solution of 2-amino-2-methyl-1-propanol (1000 g, 10.5 mol) in CH2Cl2 (2000 mL) dropwise at 0-10° C. A white precipitate formed 5 minutes after the initial addition. The resulting slurry was stirred at room temperature overnight. The solid was removed by filtration and washed with CH2Cl2 (1000 mL). The filtrate was concentrated on by rotary evaporation to give 101b as a light yellow resin which was used in the next step without further purification.

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