Novel Molecular Clamp Method for Anomeric Stereocontrol of Glycosylation
作者:Masahiro Wakao、Koichi Fukase、Shoichi Kusumoto
DOI:10.1055/s-1999-2997
日期:1999.12
Stereocontrolled glycosylation is described by using a molecular clamp, which binds a glycosyl donor to an acceptor and controls their spatial arrangement. An α(1 → 4) glycosidic linkage was formed in a good yield with high selectivity by the use of phthaloyl bridge bound to both 6-positions of a glycosyl donor and an acceptor. β-Selective glycosylation was effected by the use of a silyl bridge attached to the same 6-positions of the same glycosyl donor and acceptor. Application of this method to the synthesis of a maltotetraose derivative is also described.