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Title:
A METHOD FOR PREPARATION OF HEXASACCHARIDE
Document Type and Number:
WIPO Patent Application WO/2001/023397
Kind Code:
A1
Abstract:
This invention relates to a method for the preparation of the phytoalexin elicitor hexasaccharide that can be used as pesticide. 1,2:5,6-Di-O-isopropylidene-glucoturanose is used as the glycosyl acceptor and 1,3-$g(b)-linked disaccharide is obtained first. Selective hydrolysis of the 5,6-O-isopropylidene affords the disaccharide with 5,6-free hydroxyl groups. The disaccharide with 5,6-free hydroxyl groups is used as the glycosyl acceptor and acylated glucosyl derivative is used as the glycosyl donor, their coupling gives trisaccharide. Hydrolysis, acetylation, selective removal of acetyl in the 1-position gives the trisaccharide donor. The trisaccharide acceptor is similarly prepared. Coupling of the trisaccharide donor with the trisaccharide acceptor followed by deprotection affords the required hexasaccharide. The invented method has advantages such as simple procedure and cheap cost etc.

Inventors:
KONG FANZUO (CN)
NING JUN (CN)
Application Number:
PCT/CN2000/000225
Publication Date:
April 05, 2001
Filing Date:
August 07, 2000
Export Citation:
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Assignee:
RES CT ECO ENVIRONMENTAL SCIEN (CN)
KONG FANZUO (CN)
NING JUN (CN)
International Classes:
C07H3/06; C07H9/04; (IPC1-7): C07H3/04; C07H3/06
Foreign References:
CN1188770A1998-07-29
CN1242372A2000-01-26
CN1242371A2000-01-26
Other References:
CARBOHYDRATE RESEARCH, vol. 315, 1999, pages 117 - 127
TETRAHEDRON LETTERS, vol. 39, 1998, pages 1937 - 1940
Attorney, Agent or Firm:
LUNG TIN INTERNATIONAL PATENT & TRADEMARK AGENT LTD. (Tower B. Grand Place No.5 Huizhong Roa, Chaoyang District Beijing 1, CN)
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