Synthesis of trisaccharide 6’ SiaLec and its 6-O-Su derivative
摘要:
The synthetic approach to 6'SiaLe(c) and its 6-O-Su derivative comprised alpha-sialylation of a protected Le(c) derivative, 2,3-di-OAcGal beta 1-3(3-OAc-6-OBn)GlcNAc beta 1-Osp (68% yield) as the key stage. Deprotection of the obtained trisaccharide (three stages, 79% overall yield) led to Neu5Ac alpha 2-6Gal beta 1-3GlcNAc beta 1-Osp; partial deprotection followed by selective sulfation and total deprotection - to Neu5Ac alpha 2-6Gal beta 1-3(6-O-Su)GlcNAc beta 1-Osp (four stages, 72% overall yield).
Synthesis of trisaccharide 6’ SiaLec and its 6-O-Su derivative
摘要:
The synthetic approach to 6'SiaLe(c) and its 6-O-Su derivative comprised alpha-sialylation of a protected Le(c) derivative, 2,3-di-OAcGal beta 1-3(3-OAc-6-OBn)GlcNAc beta 1-Osp (68% yield) as the key stage. Deprotection of the obtained trisaccharide (three stages, 79% overall yield) led to Neu5Ac alpha 2-6Gal beta 1-3GlcNAc beta 1-Osp; partial deprotection followed by selective sulfation and total deprotection - to Neu5Ac alpha 2-6Gal beta 1-3(6-O-Su)GlcNAc beta 1-Osp (four stages, 72% overall yield).