Hydrochloric Acid → (S)-4-amino-5-methoxy-N,N,N-trimethyl-5-oxopentan-1-aminium chloride hydrochloride

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Reaction Steps

To a solution of (S)-4-(tert-butoxycarbonylamino)-5-methoxy-N,N,N-trimethyl-5-oxopentan-1-aminium iodide (20.5 mmol, 1.0 eq) in anhyd dioxane (10 mL), was added HCl (51 mL, 205 mmol, 10 eq, 4M in dioxane). The orange slurry was stirred at room temperature for 1 h, the solids were broken up, then stirred vigorously for another 1 h. The suspension was allowed to settle before cannulating off the dioxane layer. The remaining yellow slurry was rinsed with Et2O, stirred and cannulated out the ether layer (4×). The solids were dried under high vacuum to give the title compound (5.68 g) as a light yellow powder. 1H NMR (400 MHz, DMSO) δ 8.75 (s, 3H), 4.03-3.93 (m, 1H), 3.68 (s, 3H), 3.30-3.20 (m, 2H), 2.98 (s, 9H), 1.89-1.69 (m, 4H); MS (EI) m/z 189 (M+).

Provenance & Evidence