反应详情

The L-gulose benzylphenylhydrazone was refluxed for three hours with 100 ml. of water and 20 ml. of ethanol containing 7.5 ml. of benzaldehyde and 0.8 grams of benzoic acid. After cooling, the solution was decanted from the crystals of benzaldehyde benzylphenylhydrazone and extracted several times with ether to remove the benzaldehyde and benzoic acid. The solution was then decolorized with activated carbon and concentrated under reduced pressure to a colorless syrup to yield 3.4 grams of syrupy L-gulose.

1. temperatureAfter cooling
2. customthe solution was decanted from the crystals of benzaldehyde benzylphenylhydrazone
3. extractionextracted several times with ether
4. customto remove the benzaldehyde and benzoic acid
5. concentrationconcentrated under reduced pressure to a colorless syrup