b-D-Glcp-(13)-[b-D-Glcp-(16)-]a-D-Manp-(13)-b-D-Glcp-(13)-[b-D-Glcp-(16)-]D-Glcp (18) and b-D-Glcp-(13)-[b-D-Glcp-(16)-]a-D-Manp-(13)-b-D-Glcp-(13)-[b-D-Glcp-(16)-]b-D-Glcp-D-(13)-Glcp-1OMe (29) were synthesized as th...b-D-Glcp-(13)-[b-D-Glcp-(16)-]a-D-Manp-(13)-b-D-Glcp-(13)-[b-D-Glcp-(16)-]D-Glcp (18) and b-D-Glcp-(13)-[b-D-Glcp-(16)-]a-D-Manp-(13)-b-D-Glcp-(13)-[b-D-Glcp-(16)-]b-D-Glcp-D-(13)-Glcp-1OMe (29) were synthesized as the analogues of the immunomodulator b-D-Glcp-(13)-[b-D-Glcp- (16)-]a-D-Glcp-(13)-b-D-Glcp-(13)-[b-D-Glcp-(16)-]D-Glcp through coupling of trisaccharide donors 9 with trisaccharide acceptor 16 and tetrasaccharide acceptor 27 followed by deprotection, respectively.展开更多
The phytoalexin elicitor β-(1→3)-branched β-(1→6)-linked glucohexatose has been regie- and stereospeciflcally synthesized by coupling of the 3, 6-branched gluco-trisaccharide Schmidt reagent 10 with a mixture of m...The phytoalexin elicitor β-(1→3)-branched β-(1→6)-linked glucohexatose has been regie- and stereospeciflcally synthesized by coupling of the 3, 6-branched gluco-trisaccharide Schmidt reagent 10 with a mixture of multiol 3,6-branched gluco-trisac-charides 13 which consists of free 5,6'-OH trisaccharide, free 5,2' ,6'-OH trisaccharide, free 5,3' ,6'-OH trisaccharide and so on. The compounds 10 and 13 were prepared from 1,2:5,6-di-O-isopropylidene-α-D-glucofuranose, 2, 3, 4, 6-tetra-O-ben-zoyl-α-D-glucopyranosyl trichloroacetimidate, and 2,3,4,6-te-tra-O-acetyl-α-D-glucopyranosyl trichloroacetimidate through re-gio- and stereoselective manners.展开更多
基金Project supported by Chinese Academy of Sciences (No. KZCX3-J-08) and the National Science Foundation of China (Nos. 30070185 and 39970964).
文摘b-D-Glcp-(13)-[b-D-Glcp-(16)-]a-D-Manp-(13)-b-D-Glcp-(13)-[b-D-Glcp-(16)-]D-Glcp (18) and b-D-Glcp-(13)-[b-D-Glcp-(16)-]a-D-Manp-(13)-b-D-Glcp-(13)-[b-D-Glcp-(16)-]b-D-Glcp-D-(13)-Glcp-1OMe (29) were synthesized as the analogues of the immunomodulator b-D-Glcp-(13)-[b-D-Glcp- (16)-]a-D-Glcp-(13)-b-D-Glcp-(13)-[b-D-Glcp-(16)-]D-Glcp through coupling of trisaccharide donors 9 with trisaccharide acceptor 16 and tetrasaccharide acceptor 27 followed by deprotection, respectively.
基金Project supported by the Beijing Natural Science Foundation(No.6021004)and the Ministry of Science and Technology(No.2001AA246014).
文摘The phytoalexin elicitor β-(1→3)-branched β-(1→6)-linked glucohexatose has been regie- and stereospeciflcally synthesized by coupling of the 3, 6-branched gluco-trisaccharide Schmidt reagent 10 with a mixture of multiol 3,6-branched gluco-trisac-charides 13 which consists of free 5,6'-OH trisaccharide, free 5,2' ,6'-OH trisaccharide, free 5,3' ,6'-OH trisaccharide and so on. The compounds 10 and 13 were prepared from 1,2:5,6-di-O-isopropylidene-α-D-glucofuranose, 2, 3, 4, 6-tetra-O-ben-zoyl-α-D-glucopyranosyl trichloroacetimidate, and 2,3,4,6-te-tra-O-acetyl-α-D-glucopyranosyl trichloroacetimidate through re-gio- and stereoselective manners.
