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).
Stereo- and regioselective synthesis of spacer armed α2-6 sialooligosaccharides
作者:Galina V. Pazynina、Svetlana V. Tsygankova、Marina A. Sablina、Alexander S. Paramonov、Alexander B. Tuzikov、Nicolai V. Bovin
DOI:10.1016/j.mencom.2016.09.004
日期:2016.9
A simple protocol for the preparation of alpha 2-6 sialooligosaccharides including SiaTn, SiaTF, 6'SL and 6'SLN in moderate yields involves room temperature glycosylation of 4,6-diol acceptors with routine sialic donor and one step isolation.