Azaglycosylation of complex stannyl alkoxides with glycal-derived iodo sulfonamides: a straightforward synthesis of sialyl-Lewis X antigen and other oligosaccharide domains
Stereocontrolled synthesis of sialyl Lex, the oligosaccharide binding ligand to ELAM-1 (sialyl =N-acetylneuramin)
作者:K. C. Nicolaou、C. W. Hummel、N. J. Bockovich、C.-H. Wong
DOI:10.1039/c39910000870
日期:——
Sialyl Lex1 the oligosaccharide binding ligand to ELAM-1 is synthesized from building blocks 2–5via a short route featuring the principle of a neighbouring PhS group as an auxiliary to facilitate and stereochemically control the formation of the desired glycoside bond in the target molecule.
Inhibitors of E-, P- and L-selectin binding are synthesized by an aldol addition reaction between a glycoside aldehyde precursor and dihydroxyacetone phosphate or a derivative thereof. The addition reaction is catalyzed by aldolase. The inhibitors exhibit an activity comparable to sialyl Lewis X with respect to the E-selectin binding assay and high activities in the P- and L-selectin binding assays. The inhibitors are employable for blocking neutrophil inflamatory conditions.
E-, P- 和 L- 选择素结合的抑制剂是通过糖苷醛前体和二羟基丙酮磷酸盐或其衍生物之间的醛缩加反应合成的。醛缩加反应由醛缩酶催化。这些抑制剂在 E- 选择素结合试验中表现出与唾液酸 Lewis X 相当的活性,并且在 P- 和 L- 选择素结合试验中具有高活性。这些抑制剂可用于阻止中性粒细胞炎症病症。
Azaglycosylation of complex stannyl alkoxides with glycal-derived iodo sulfonamides: a straightforward synthesis of sialyl-Lewis X antigen and other oligosaccharide domains
作者:Samuel J. Danishefsky、Koshi Koseki、David A. Griffith、Jacquelyn Gervay、John M. Peterson、Frank E. McDonald、Takeshi Oriyama