Triethylamine → HCID 67195867, compound

Participants

Reaction Steps

A suspension of aluminium chloride (1.053 g, 7.89 mmol) in DCM (10 mL) at room temperature under nitrogen was treated with 1-methylethyl {(2S,4R)-1-acetyl-2-methyl-6-[4-(1-piperidinylmethyl)phenyl]-1,2,3,4-tetrahydro-4-quinolinyl}carbamate (for a preparation see intermediate 67) (0.915 g, 1.974 mmol) as a solution in DCM (2.5 mL) and the resulting mixture was stirred at room temperature for 1 h then cooled using an ice bath and treated with triethylamine (3.30 ml, 23.68 mmol) in methanol (2 mL) producing a thick precipitate. AcOEt (25 mL) was added to the thick precipitate formed and the mixture was stirred for 30 min. The precipitate was filtered off and partitioned between a saturated NaHCO3 aqueous solution (50 mL) and AcOEt (50 mL). The resulting biphasic mixture was stirred at room temperature for 30 min and then the layers were separated. The aqueous layer was stirred with 1:1 DCM:AcOEt (50 mL) and the organic layer was collected using a hydrophobic frit. This was repeated twice. The first AcOEt phase was also eluted through the hydrophobic frit and the combined organics concentrated in vacuovacuo. Purification of the residue by flash chromatography on silica gel using a 100 G silica cartridge (gradient:1 to 10% (2N NH3 in MeOH) in DCM) gave (2S,4R)-1-acetyl-2-methyl-6-[4-(1-piperidinylmethyl)phenyl]-1,2,3,4-tetrahydro-4-quinolinamine (150 mg, 0.358 mmol, 18.12% yield) as a yellow oil.

Provenance & Evidence