反应详情

Triethylamine (3.7 mL) and sulfur trioxide•pyridine complex (1.7 g) were added to a dimethyl sulfoxide(4.0 mL)/ethyl acetate(8.0 mL) solution of ethyl 2-({2-[(1R,2S,5S)-2-(acetyloxy)-5-(hydroxymethyl)cyclopentyl]ethyl}thio)-1,3-thiazole-4-carboxylate (500 mg) (see compound 7 described in the pamphlet of International Publication No. WO 2006/129788) at 10° C., followed by stirring at room temperature for 30 min. To the reaction solution, 1 N hydrochloric acid was added, followed by extraction with ethyl acetate. The organic layer was washed with water and saturated brine; dried with anhydrous sodium sulfate; and concentrated to obtain the title compound (497 mg) having the following physical properties:

1. customat 10° C.
2. extractionfollowed by extraction with ethyl acetate
3. washThe organic layer was washed with water and saturated brine
4. dry with materialdried with anhydrous sodium sulfate
5. concentrationand concentrated