2-(Methylamino)ethanol → HCID 23729488, compound

Participants

Reaction Conditions

Reaction Steps

4-[(8-Bromooctanoyl)amino]-N-{[1,6-diethyl-4-(tetrahydro-2H-pyran-4-ylamino)-1H-pyrazolo[3,4-b]pyridin-5-yl]methyl}benzamide (100 mg, 0.16 mmol, e.g. which can optionally be as prepared in Intermediate 11) was dissolved in N,N-dimethylformamide (4 ml). To one-quarter of this solution, i.e. containing 4-[(8-bromooctanoyl)amino]-N-{[1,6-diethyl-4-(tetrahydro-2H-pyran-4-ylamino)-1H-pyrazolo[3,4-b]pyridin-5-yl]methyl}benzamide (25 mg, 0.04 mmol) in N,N-dimethylformamide (1 ml), was added 2-(methylamino)ethanol (0.0064 ml (6.4 microliters), 0.08 mmol, 2 equivalents, commercially available e.g. from Aldrich) followed by N,N-diisopropylethylamine (0.04 ml, about 6 equivalents). The reaction mixture was heated at 85° C. for 16 hours. The solvent was evaporated and the residue was purified by eluting through a 5 g silica SPE cartridge, with dichloromethane containing 20% methanol and 1% triethylamine as the eluent, to give the title compound (18.7 mg), in the form of a cream foam, initially thought to be in the form of the “free base”. LCMS showed MH+=622; TRET=2.20 min. However, later re-inspection of the 1H NMR spectrum suggests that the product was isolated as a salt e.g. a mono-salt (presumed to be a hydrobromide salt), e.g. from the signals of protons adjacent to the (2-hydroxyethyl)(methyl)amino group.

Provenance & Evidence