反应详情

Combine (S)-1-benzyl-3-(2-methylsulfanyl-ethyl)-piperazine (0.900 g, 3.59 mmol) and 37% formaldehyde solution (0.4 mL, 5.39 mmol) in methylene chloride (15 mL). Stir for 10 minutes and add sodium triacetoxy borohydride (3.05 g, 14.4 mmol). Stir an additional 90 minutes and then pour solution onto 1N sodium hydroxide solution. Extract with methylene chloride to give 0.947 g of the crude product. Silica gel chromatography, eluting with methylene chloride:2N ammonia/methanol (100:2), gives 0.906 g of the title compound as a colorless oil; mass spectrum (ion spray): m/z =265 (M+1).

1. stirringStir an additional 90 minutes
2. extractionExtract with methylene chloride
3. customto give 0.947 g of the crude product
4. washSilica gel chromatography, eluting with methylene chloride