Ammonium Hydroxide → (1SR,2RS)-3-amino-1-(5-fluoro-3-methyl-1H-indol-1-yl)-1-phenylpropan-2-ol

Participants

Reaction Steps

To a solution of (2S,3S)-toluene-4 sulfonic acid 3-(5-fluoro-3-methyl-indol-1-yl)-2-hydroxy-3-phenyl-propyl ester (Intermediate in EXAMPLE 117, step 6, 0.15 g, 0.33 mmol) in methanol (10 mL) was added concentrated ammonium hydroxide (20 mL), and the reaction was stirred for 12 hours. Upon completion, the reaction was partitioned between water (25 mL) and ethyl acetate (25 mL). The organic layer was separated, dried over anhydrous sodium sulfate, filtered, and concentrated in vacuo. The crude product was purified via Biotage chromatography (FlasH40i, silica, 25% MeOH/dichloromethane) to give (1SR,2RS)-3-amino-1-(5-fluoro-3-methyl-1H-indol-1-yl)-1-phenylpropan-2-ol as a clear oil. The free base was dissolved in a minimum amount of ethanol and treated with a 4N solution of hydrochloric acid in dioxane and stirred for 1 hour s. The ethanol was removed in vacuo and the clear oil was triturated with ether/dichloromethane to give (1SR,2RS)-3-amino-1-(5-fluoro-3-methyl-1H-indol-1-yl)-1-phenylpropan-2-ol hydrochloride as a white solid. MS (ES) m/z 299.0

Provenance & Evidence