Diisopropylamine → HCID 69279612, compound

Participants

Reaction Conditions

Reaction Steps

n-Butyllithium (1.6M in hexanes, 0.164 mol) was added dropwise at −30° C. under N2 flow to a mixture of N-(1-methylethyl)-2-propanamine (0.164 mol) in THF (70 ml). The mixture was cooled to −70° C. A mixture of 1-methyl-1H-imidazo[4,5-b]pyridine (0.0751 mol) in THF (70 ml) was added dropwise. The mixture was stirred for 1 hour. A mixture of hexahydro-1-(phenylmethyl)-4H-azepin-4-one (0.0787 mol) in THF (60 ml) was added at −70° C. The mixture was stirred at −70° C. for 2 hours, brought to 0° C., poured out into water and NH4Cl and extracted with DCM and a small amount of methanol. The organic layer was separated, dried, filtered and evaporated to dryness. The residue was purified by column chromatography over silica gel (eluent: CH2Cl2/CH3OH/NH4OH 97/3/0.5). The desired fractions were collected and the solvent was evaporated, yielding 8.8 g of (±)-hexahydro-4-(1-methyl-1H-imidazo[4,5-b]pyridin-2-yl)-1-(phenylmethyl)-1H-azepin-4-ol (compound 152).

Provenance & Evidence