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Synlett 1990; 1990(6): 311-313
DOI: 10.1055/s-1990-21073
DOI: 10.1055/s-1990-21073
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Iodonium Ion Promoted Cyclization: A Convenient Approach to Glycosyl Donors of 3-Deoxy-D-manno-2-octulosonic Acid (KDO)
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Publikationsverlauf
Publikationsdatum:
08. März 2002 (online)
Cyclization of methyl 3-deoxy-4,5:7,8-di-O-isopropylidene-D-manno-octulonate diethyl dithioacetal with iodonium sym-dicollidine perchlorate or N-iodosuccinimide yields methyl 2,3-dideoxy-4,5:7,8-di-O-isopropylidene-D-manno-oct-2-enulosonate (KDO-glycal) or the ethyl 2-thio-α-glycoside of 3-deoxy-D-manno-2-octulosonic acid, respectively. The latter compounds can be employed as glycosyl donors of 3-deoxy-D-manno-2-octulosonic acid.