Triethylamine → HCID 53241832, compound

Participants

Reaction Conditions

Reaction Steps

(2R)-2-amino-N-(6-{[3-(1-methylethyl)phenyl]oxy}-3-pyridinyl)butanamide (Intermediate 70, 930 mg) was dissolved in dry dichloromethane (100 mL). The reaction mixture, under argon, was cooled down in an ice bath. Triethylamine (2.482 mL, 17.81 mmol) was added. Then a solution of triphosgene in dry dichloromethane (352 mg, 1.187 mmol dissolved in 40 mL of dichloromethane) was added dropwise. The reaction mixture was stirred at 0° C., under argon, during 10 min. A saturated aqueous solution of NaHCO3 was added (100 mL) and the aqueous layer was extracted with dichloromethane 4 times (4×80 mL). After drying over sodium sulphate, the solvent was removed under vacuum. The residue obtained was purified by silica gel chromatography (Companion system, 120 g silica cartridge), with a gradient cyclohexane/ethyl acetate 100/0 to 55/45. The title compound (5R)-5-ethyl-3-(6-{[3-(1-methylethyl)phenyl]oxy}-3-pyridinyl)-2,4-imidazolidinedione was obtained as a beige powder (768 mg).

Provenance & Evidence