Dimethyl Disulfide → 2-Chloro-5-(methylthio)pyrimidine

A solution of 1.00 g (5.17 mmol) of 5-bromo-2-chloropyrimidine and 551 μl (6.20 mmol) of dimethyl disulfide in 26 ml of tetrahydrofuran was cooled to −78° C. and 1.89 ml (5.17 mmol) of 2.73 N n-butyl lithium/n-hexane solution was added thereto, and the reaction solution was stirred for 2 hours. After completion of the reaction, saturated ammonium chloride aqueous solution was added to the reaction solution and the reaction solution was extracted with ethyl acetate. The organic layer was washed with saturated sodium chloride aqueous solution and dried with anhydrous sodium sulfate, and then the solvent was distilled off under reduced pressure. The obtained residue was subjected to silica gel column chromatography [n-hexane/ethyl acetate=90/10 (V/V)] and the fraction including the desired compound was concentrated under reduced pressure to provide 149 mg of the title compound as a white solid (yield: 18%).

1. additionwas added to the reaction solution
2. extractionthe reaction solution was extracted with ethyl acetate
3. washThe organic layer was washed with saturated sodium chloride aqueous solution
4. dry with materialdried with anhydrous sodium sulfate
5. distillationthe solvent was distilled off under reduced pressure
6. concentrationwas concentrated under reduced pressure

ORD-Eintrag

ord-796ea8d6c4474d02b1083efd32a43173

Quelldatensatz

uspto-grants-2015_11

DOI

10.6084/m9.figshare.5104873.v1

Patentnummer

US09187450B2