Use of Polystyrene-Supported DBU in the Synthesis and α-Selective Glycosylation Study of the Unstable Schmidt Donor of <scp>l</scp>-Kedarosamine
作者:Isao Ohashi、Martin J. Lear、Fumihiko Yoshimura、Masahiro Hirama
DOI:10.1021/ol036353v
日期:2004.3.1
In the alpha-glycosylation study of the unusual, 2-deoxy amino sugar of kedarcidin, polystyrene-supported DBU (PDBU) was found to be invaluable to the clean preparation of the highly labile Schmidt donor of L-kedarosamine. By further recognition that the C4-alcohol should be left free for favorable acceptor reactivity, we could for the first time successfully assemble the C13-O-alpha-glycoside of the ansamacrolicle substructure of the kedarcidin chromophore.