Water → [3-methyl-4-((1S,4S)-2-methyl-2,5-diazabicyclo[2.2.1]heptan-5-yl)phenyl][N,N-bis(tert-butoxycarbonyl)]guanidine

Participants

Reaction Steps

On a larger scale, 3-methyl-4-[(1S,4S)-5-methyl-2,5-diazabicyclo[2.2.1]hept-2-yl]aniline (10.0 g, 45.8 mmol) and 1-(tert-butoxycarbonylamino(tert-butoxycarbonylimino)methyl)pyrazole (15.0 g, 48.2 mmol) were combined in DMF (25 mL) and stirred at ambient temperature. The progress of homogenous reaction was monitored by LC/MS. After 36 h, the reaction mixture was added slowly to water (300 mL) in a beaker with vigorous stirring, whereupon a precipitate formed. The reaction flask was rinsed with DMF (2×5 mL) and transferred to the beaker. Suction filtration of the suspension, further washing of the resulting filter cake with water (200 mL) and air drying under suction provided 20.5 g (97%) of [3-methyl-4-((1S,4S)-2-methyl-2,5-diazabicyclo[2.2.1]heptan-5-yl)phenyl][N,N-bis(tert-butoxycarbonyl)]guanidine (Ja) as a off-white purple solid; LCMS: purity: 96%; MS (m/e): 449 (MH+).

Provenance & Evidence