Dimethylformamide → HCID 56959109, compound

Participants

Reaction Conditions

Reaction Steps

A mixture of methyl 8-chloro-1-cyclopropyl-9-methyl-4-oxo-4H-quinolizine-3-carboxylate (200 mg, 0.69 mmol), N-(tert-butoxycarbonyl)-piperazine (256 mg, 1.38 mmol) and NaHCO3 (259 mg, 14.64 mmol) in ACN (8.6 mL) was heated in a microwave at 120° C. for 20 min. DMF (2 mL) was added to the mixture and the reaction was heated in a microwave at 120° C. for 20 min. Then the reaction was heated in a microwave at 130° C. for 30 min twice. The reaction mixture was diluted with ethyl acetate (30 mL), and washed with water (30 mL). After extraction of the aqueous phase with ethyl acetate (2×30 mL), the organic phases were combined washed with brine, dried with magnesium sulfate, filtrated, and concentrated. The residue was dissolved in TFA (1 mL) and agitated for 1 hour prior to evaporation of the solvent. The residue was dissolved in THF (1 mL) and an aqueous 4M NaOH solution (0.79 mL) and heated in a microwave at 120° C. for 10 min. More aqueous 4M NaOH solution (0.5 mL) was added and the reaction was heated in a microwave at 120° C. for 10 min. The mixture was evaporated and the residue purified by preparative HPLC. The title compound EXAMPLE 34 was obtained after lyophilization (28 mg, 12.5%). High-Res MS: calculated 328.1656 (M+H)+. found 328.1642 (M+H)+.

Provenance & Evidence