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Synthesis of a trisaccharide repeating unit of the O-antigen from Burkholderia anthina and its dimer.
- Source :
-
Carbohydrate Research . Jun2016, Vol. 427, p13-20. 8p. - Publication Year :
- 2016
-
Abstract
- A trisaccharide repeating unit of the O-antigen from Burkholderia anthina, α-L-Rha-(1→2)-α-L-Rha-(1→2)-β-D-Gal-O(CH 2 ) 3 NH 2 ( 1 ), and its dimer, α-L-Rha-(1→2)-α-L-Rha-(1→2)-α-D-Gal-(1→3)-α-L-Rha-(1→2)-α-L-Rha-(1→2)-β-D-Gal-O(CH 2 ) 3 NH 2 ( 2 ), were synthesized via a highly convergent and efficient assembly strategy. Sequential glycosylation of galactosyl acceptor 6 with rhamnosyl thioglycoside 7 , followed by condensation of the resulting disaccharide acceptor 9 with rhamnosyl imidate donor 10 , gave the title molecule 1 after global deprotection. The title hexasaccharide 2 was assembled in a convergent [2+2+2] manner, in which α-1,2-linked disaccharide 12 was initially obtained by the coupling reaction of disarmed thiorhamnoside acceptor 15 with armed thiogalactoside donor 14 . Sequential glycosylation of disaccharide acceptor 9 with thioglycoside donors 12 and 13 afforded the target compound 2 after global deprotection. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 00086215
- Volume :
- 427
- Database :
- Academic Search Index
- Journal :
- Carbohydrate Research
- Publication Type :
- Academic Journal
- Accession number :
- 115216237
- Full Text :
- https://doi.org/10.1016/j.carres.2016.03.023