Potassium Carbonate → HCID 89851613, compound

Participants

Reaction Conditions

Reaction Steps

The mixture of 5-benzyl-4,5,6,7-tetrahydro-2H-pyrazolo[4,3-c]pyridine (1.0 g, 4.69 mmol), ethyl 2-chloronicotinate (1.55 g, 8.35 mmol), K2CO3 (1.7 g, 12.30 mmol), 18-CROWN-6 (0.2 g, 0.757 mmol) and KI (0.13 g, 0.783 mmol) in N,N-dimethylformamide (15 mL) was heated to 140° C. under stirring. After completion of the reaction the mixture was concentrated, the remainder dissolved in 250 mL of dichloromethane, washed subsequently with water (3×30 mL) and brine, dried (MgSO4), filtered and concentrated to give 2.21 g of a brown oil, which was purified by chromatography over silica gel (eluent CH2Cl2/methanol). 200 mg of the title compound was obtained as a white amorphous solid; ESI-MS [M+H]+: 363.2.

Provenance & Evidence