Tetrahydrofuran → HCID 54245694, compound

Participants

Reaction Conditions

Reaction Steps

1.55 g (10 mmol) of 2-amino-4,6-dimethoxypyrimidine was dissolved in 40 ml of dry tetrahydrofuran, and 1.42 g (10 mmol) of chlorosulfonyl isocyanate was dropwise added thereto at -40° C. The reaction temperature was raised to 0° C., and then the reaction mixture was cooled again to--60° C. Then, 1.90 g (12 mmol) of 2-imino-3-n-butylthiazolidine suspended in 40 ml of dry tetrahydrofuran containing 1.33 g (13 mmol) of triethylamine, was added thereto. The reaction temperature was raised to room temperature, and the mixture was further stirred at the same temperature for one hour. Then, the solvent was distilled off under reduced pressure. Then, water was added to the residue, and the mixture was extracted three times with chloroform. The chloroform layer was washed sequentially with water and a saturated sodium chloride aqueous solution, and then dried over anhydrous sodium sulfate. Then, the solvent was distilled off under reduced pressure. The obtained crystals were washed with ethyl ether to obtain 2.8 g of desired 1-(3-n-butylthiazolidine-2-sulfonylimino)-3-(4,6-dimethoxypyrimidin-2-yl)urea. Melting point: 139°-140° C.

Provenance & Evidence