## Abstract The fast, selective and mild removal of levulinoyl groups with hydrazine from galactose, which also carries hydroxyl functions protected with acetyl groups, enabled us, under Koenigs‐Knorr conditions, to synthesize tri‐ and tetrasaccharides containing β‐linked galactose and glucose unit
Synthesis of oligosaccharides by using levulinic ester as an hydroxyl protecting group
✍ Scribed by H.J. Koeners; J. Verhoeven; J.H. van Boom
- Publisher
- Elsevier Science
- Year
- 1980
- Tongue
- French
- Weight
- 142 KB
- Volume
- 21
- Category
- Article
- ISSN
- 0040-4039
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## Abstract magnified image A new synthetic methodology towards substituted 2‐amino‐5‐chlorothiophenes is described. Compounds of this type are important as building blocks for oligomers used in polymer research. Easily available 2‐aminothiophenes underwent Paal‐Knorr reaction to protect the free