Diphosphate formation using cyanuric chloride or triisopropylbenzenesulfonyl chloride as the activating agents
摘要:
By using cyanuric chloride or 2,4,6-triisopropylbenzenesulfonyl chloride (TIPSCl) as the condensing agent and magnesium bromide as the promoter, the phosphate cross-coupling reactions are effectively carried out to give lipid-saccharide and pyrrolidine-guanosine diphosphates. Under optimized conditions, the TIPSCl-facilitated cross-coupling reactions complete in a short reaction time (similar to 5 h) without the complication of possible self-coupling reactions. (c) 2011 Elsevier Ltd. All rights reserved.
Diphosphate formation using cyanuric chloride or triisopropylbenzenesulfonyl chloride as the activating agents
作者:Teng-Chi Lin、Jim-Min Fang
DOI:10.1016/j.tetlet.2011.01.034
日期:2011.4
By using cyanuric chloride or 2,4,6-triisopropylbenzenesulfonyl chloride (TIPSCl) as the condensing agent and magnesium bromide as the promoter, the phosphate cross-coupling reactions are effectively carried out to give lipid-saccharide and pyrrolidine-guanosine diphosphates. Under optimized conditions, the TIPSCl-facilitated cross-coupling reactions complete in a short reaction time (similar to 5 h) without the complication of possible self-coupling reactions. (c) 2011 Elsevier Ltd. All rights reserved.
Biochemical characterization of the novel α-1, 3-galactosyltransferase WclR from Escherichia coli O3
formation of regio- and stereo-specific glycosidic linkages between specific sugar donors and recipients. In this study, the function of the gene wclR from the Escherichiacoli O3 O-antigen gene cluster that encodes an alpha 1, 3-galactosyltransferase (GalT) that acts on the linkage Gal alpha 1, 3-GlcNAc was biochemically characterized. WclR was expressed in E. coli BL21 (DE3), and the enzymatic product