Pyridine → 2-[3-(3,3-Diethyl-ureido)-phenyl]-3,3-dimethyl-1,2,3,4-tetrahydro-quinoline-6-carboxylic acid ethyl ester

Participants

Reaction Conditions

Reaction Steps

To a solution of 2-(3-amino-phenyl)-3,3-dimethyl-1,2,3,4-tetrahydro-quinoline-6-carboxylic acid ethyl ester (648 mg, 2 mmol) in dichloromethane (5 mL) and pyridine (1 mL, 12 mmol) was added a solution of diethylcarbamyl chloride (0.28 mL, 2.2 mmol) in dichloromethane (2 mL) dropwise at 0° C. The reaction mixture was stirred at 25° C. for 16 h. Then the reaction mixture was extracted with dichloromethane (2×50 mL), washed with water, dried over anhydrous sodium sulfate and concentrated in vacuo to afford 2-[3-(3,3-diethyl-ureido)-phenyl}-3,3-dimethyl-1,2,3,4-tetrahydro-quinoline-6-carboxylic acid ethyl ester (846 mg, 100%) as a brown oil which was used for next step without further purification: LC/MS m/e calcd for C25H33N3O3 (M+H)+: 424.56, observed: 424.2.

Provenance & Evidence