中文名称 | 英文名称 | CAS号 | 化学式 | 分子量 |
---|---|---|---|---|
—— | 5-(Methoxycarbonyl)pentyl 2,3,4,6-tetra-O-acetyl-1-thio-β-D-mannopyranoside | 77346-30-6 | C21H32O11S | 492.544 |
—— | 5-(Methoxycarbonyl)pentyl 2,3,4,6-tetra-O-acetyl-1-thio-α-D-mannopyranoside | 77346-25-9 | C21H32O11S | 492.544 |
—— | 2,3,4,6-tetra-O-acetyl-1-thio-β-D-mannopyranose | 208341-38-2 | C14H20O9S | 364.373 |
—— | Heptyl 1-thio-β-D-mannopyranoside | 349535-91-7 | C13H26O5S | 294.412 |
Disaccharides 1-3 corresponding to the antigenic determinants of Salmonella serotypes A, B, and D1were synthesized in a form suited for use in biosensors. The disaccharide determinants each contain a unique 3,6-dideoxyhexose, namely abequose (3,6-dideoxy-D-xylo-hexose), paratose (3,6-dideoxy-D-ribohexose), and tyvelose (3,6-dideoxy-D-arabino-hexose), are α-linked to the 3-position of D-mannopyranose. The disaccharides were further derivatized with a linear aglycon that has a terminal amino group, and can be readily coupled to pertinent chains carrying a terminal thiol for the construction of self-assembled monolayers (SAMs). Efficient routes that employed a single 3,6-dideoxygenation step were developed for the synthesis of paratoside 15 and tyveloside 22.Key words: Salmonella O-antigens, lipopolysaccharide, abequose, paratose, tyvelose, 3,6-dideoxyhexose, deoxygenation, glycoside tethers, immobilization via pentenyl glycosides.