反应详情

温度

70 °C

(2S,3S,4S,5R,6S)-3,4,5-tribenzyloxy-6-[3-[[5-(4-fluorophenyl)-2-thienyl]methyl]-4-methyl-phenyl]-6-methoxy-tetrahydropyran-2-carbaldehyde 9h (1.53 g, 2.1 mmol) was dissolved in 15 mL 1,4-dioxane, followed by addition of 3.4 mL 37% formaldehyde solution and 6.3 mL 1 M sodium hydroxide. The reaction mixture was stirred for 16 hour at 70° C., and was partitioned after 50 mL saturated sodium chloride solution were added. The aqueous phase was extracted with ethyl acetate (50 mL×3) and the organic extracts were combined, dried over anhydrous magnesium sulfate, and filtered. The filtrate was concentrated under reduced pressure to obtain the title compound (2S,3S,4S,5R,6S)-3,4,5-tribenzyloxy-6-[3-[[5-(4-fluorophenyl)-2-thienyl]methyl]-4-methyl-phenyl]-2-(hydroxymethyl)-6-methoxy-tetrahydropyran-2-carbaldehyde 91 (2.0 g, pale yellow grease), which was used directly in the next step without purification.

1. customwas partitioned after 50 mL saturated sodium chloride solution
2. additionwere added
3. extractionThe aqueous phase was extracted with ethyl acetate (50 mL×3)
4. dry with materialdried over anhydrous magnesium sulfate
5. filtrationfiltered
6. concentrationThe filtrate was concentrated under reduced pressure