✦ LIBER ✦
All-α-d-linked tetra- and penta-saccharide substructures of Trestatin A by block syntheses with triflic anhydride as promoter
✍ Scribed by Hans Peter Wessel; Beatrice Mayer; Gerhard Englert
- Publisher
- Elsevier Science
- Year
- 1993
- Tongue
- English
- Weight
- 791 KB
- Volume
- 242
- Category
- Article
- ISSN
- 0008-6215
No coin nor oath required. For personal study only.
✦ Synopsis
The perbenzylated maltosyl and maltotriosyl fluorides 6 and 16 were treated with 2,3,2',3',6'-penta-O-benzyl-4,6-O-benzylidene-alpha,alpha-trehalose (7) using triflic anhydride as a promoter to give all-alpha-D-linked tetra- and penta-saccharides which were finally deblocked to the free oligosaccharides 4-O-alpha-maltosyl-9 and 4-O-alpha-maltotriosyl-alpha,alpha-trehaloses 18. The 1H NMR spectra of some of the compounds were fully analyzed by 1D TOCSY and ROESY experiments.