Methyl iodide → (S)-4-(tert-butoxycarbonylamino)-5-methoxy-N,N,N-trimethyl-5-oxopentan-1-aminium iodide

Participants

Reaction Steps

To a solution of (S)-methyl 2-(tert-butoxycarbonylamino)-5-(dimethylamino)pentanoate (5.62 g, 20.5 mmol, 1.0 eq) in THF (40 mL), was added iodomethane (1.4 mL, 22.5 mmol, 1.1 eq). The mixture was stirred at room temperature for 1 h, until the starting material was consumed as determined by LCMS analysis. The reaction mixture was concentrated and then dried under high vacuum to provide (S)-4-(tert-butoxycarbonylamino)-5-methoxy-N,N,N-trimethyl-5-oxopentan-1-aminium iodide as a white solid, which was used in the next step without purification. MS (EI) m/z 289 (M+).

Provenance & Evidence