by Filice, Marco, Guisan, Jose M, Terreni, Marco and Palomo, Jose M
Abstract:
This protocol describes the regioselective deprotection of single hydroxyls in peracetylated monosaccharides and disaccharides by enzymatic or chemoenzymatic strategies. The introduction of a one-pot enzymatic step by using immobilized biocatalysts obviates the requirement to carry out tedious workups and time-consuming purifications. By using this straightforward protocol, different per-O-acetylated glycopyranosides (mono- or disaccharides, 1-substituted or glycals) can be transformed into a whole set of differentially monodeprotected 1-alcohols, 3-alcohols, 4-alcohols and 6-alcohols in high yields. These tailor-made glycosyl acceptors can then be used for stereoselective glycosylation for oligosaccharide and glycoderivative synthesis. They have been successfully used as building blocks to synthesize tailor-made di- and trisaccharides involved in the structure of lacto-N-neo-tetraose and precursors of the tumor-associated carbohydrate antigen T and the antitumoral drug peracetylated β-naphtyl-lactosamine. We are able to prepare a purified monoprotected carbohydrate in between 1 and 4 d. With this protocol, the small library of monodeprotected products can be synthesized in 1-2 weeks.
Reference:
Regioselective monodeprotection of peracetylated carbohydrates. (Filice, Marco, Guisan, Jose M, Terreni, Marco and Palomo, Jose M), In Nature Protocols, volume 7, 2012.
Bibtex Entry:
@article{filice_regioselective_2012,
	title = {Regioselective monodeprotection of peracetylated carbohydrates.},
	volume = {7},
	url = {http://www.nature.com/doifinder/10.1038/nprot.2012.098},
	doi = {10.1038/nprot.2012.098},
	abstract = {This protocol describes the regioselective deprotection of single hydroxyls in peracetylated monosaccharides and disaccharides by enzymatic or chemoenzymatic strategies. The introduction of a one-pot enzymatic step by using immobilized biocatalysts obviates the requirement to carry out tedious workups and time-consuming purifications. By using this straightforward protocol, different per-O-acetylated glycopyranosides (mono- or disaccharides, 1-substituted or glycals) can be transformed into a whole set of differentially monodeprotected 1-alcohols, 3-alcohols, 4-alcohols and 6-alcohols in high yields. These tailor-made glycosyl acceptors can then be used for stereoselective glycosylation for oligosaccharide and glycoderivative synthesis. They have been successfully used as building blocks to synthesize tailor-made di- and trisaccharides involved in the structure of lacto-N-neo-tetraose and precursors of the tumor-associated carbohydrate antigen T and the antitumoral drug peracetylated β-naphtyl-lactosamine. We are able to prepare a purified monoprotected carbohydrate in between 1 and 4 d. With this protocol, the small library of monodeprotected products can be synthesized in 1-2 weeks.},
	language = {English},
	number = {10},
	journal = {Nature Protocols},
	author = {Filice, Marco and Guisan, Jose M and Terreni, Marco and Palomo, Jose M},
	month = oct,
	year = {2012},
	pmid = {22955694},
	note = {Publisher: Nature Publishing Group},
	pages = {1783--1796}
}