direct 2,3-o-isopropylidenation of α-d-mannopyranosides and the preparation of 3,6-branched mannose trisaccharides
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ID: 221229
2014
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Abstract
A highly efficient, regioselective method for the direct 2,3-O-isopropylidenation of α-D-mannopyranosides is reported. Treatment of various α-D-mannopyranosides with 0.12 equiv of the TsOH·H2O and 2-methoxypropene at 70 °C gave 2,3-O-isopropylidene-α-D-mannopyranosides directly in 80%~90% yields. Based on this method, a 3,6-branched α-D-mannosyl trisaccharide was prepared in 50.4% total yield using p-nitrophenyl 2,3-O-isopropylidene-α-D-mannopyranoside as the starting material.
| Reference Key |
jiang2014moleculesdirect
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|---|---|
| Authors | ;Rui Jiang;Guanghui Zong;Xiaomei Liang;Shuhui Jin;Jianjun Zhang;Daoquan Wang |
| Journal | Journal of ethnopharmacology |
| Year | 2014 |
| DOI |
10.3390/molecules19056683
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| URL | |
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