反应详情

12.9 ml of triethylamine cooled to 0° to 5° C. were added to 10 g of mercapto-thiazoline in solution in 200 ml of methylene chloride, then 12 ml of benzyl chloroformate in solution in 60 ml of methylene chloride were added dropwise. After stirring for 3 hours at ambient temperature, the mixture was poured into an iced solution of N hydrochloric acid and the aqueous phase was extracted with methylene chloride. The organic phase was dried and concentrated to dryness and the residue was chromatographed on silica (eluant: hexane-ethyl acetate 7-3) to obtain 17.9 g of the expected product melting at 72° C.

1. extractionthe aqueous phase was extracted with methylene chloride
2. customThe organic phase was dried
3. concentrationconcentrated to dryness
4. customthe residue was chromatographed on silica (eluant: hexane-ethyl acetate 7-3)