Lithium Chloride → 6-(4-chlorophenyl)-1-methyl-8-(pyrimidin-2-yl)-5,6-dihydro-4H-benzo[b][1,2,4]triazolo[4,3-d][1,4]diazepine

Participants

Reaction Conditions

Reaction Steps

Into a 25 mL sealed-tube evacuated and brimmed with nitrogen, was charged with a mixture of 8-bromo-6-(4-chlorophenyl)-1-methyl-5,6-dihydro-4H-benzo[b][1,2,4]triazolo[4,3-d][1,4]diazepine (Compound 13; 40 mg, 0.10 mmol), 2-(tributylstannyl)pyrimidine (56.8 g, 0.15 mmol), [1,1′-bis(diphenylphosphino)ferrocene]dichloropalladium(II) (7.2 mg, 0.01 mmol), lithium chloride (6.5 mg, 0.15 mmol) and toluene (2 mL). The mixture was heated for 12 hours at 100° C. The mixture was concentrated in vacuo, partitioned with ethyl acetate (10 mL) and water (5 mL). The organic layer was separated, washed with brine, dried over anhydrous sodium sulfate and concentrated to give a residue. The residue was purified by prep-HPLC (Phenomenex C18 (150 mm*21.2 mm*5 um), acetonitrile/water=1:100 (0.1% formic acid), flow rate: 30 mL/min) to yield 6-(4-chlorophenyl)-1-methyl-8-(pyrimidin-2-yl)-5,6-dihydro-4H-benzo[b][1,2,4]triazolo[4,3-d][1,4]diazepine as a white solid (2 mg, 5%).

Provenance & Evidence