反应详情

3.81 g of 3-hydroxy-thiophene-2-carbaldehyde, 30.5 g of (4,5-diacetoxy-6-acetoxymethyl-2-[5-isopropyl-2-(4-methoxy-benzoyl)-thiophen-3-yloxy]-tetrahydro-pyran-3-yl) actate, 37.0 g of potassium carbonate and 9.2 g of benzyltributylammonium chloride were dissolved in 850 ml of dichloromethane. 7.5 ml of water were added, and the reaction mixture was stirred for 60 h. The solution was extraced with water and saturated sodium chloride solution, and the organic phase was dried over sodium sulfate and evaporated. 60 ml of ethanol:water (9:1) were added to the resulting brownish foam, and the resulting fine precipitate was filtered off with suction. The product with the molecular weight: 458.44 (C19H22O11S), MS (ESI): 476 (M+NH4+) was obtained.

1. dry with materialthe organic phase was dried over sodium sulfate
2. customevaporated
3. addition60 ml of ethanol:water (9:1) were added to the resulting brownish foam
4. filtrationthe resulting fine precipitate was filtered off with suction
5. customThe product with the molecular weight: 458.44 (C19H22O11S), MS (ESI): 476 (M+NH4+) was obtained