1,5-Dideoxy-1,5-iminoalditols of various configurations as well as isofagomine were N-alkylated with non-polar straight chain spacer-arms by a set of simple standard procedures. The spacer-arms' terminal functional groups, primary amines, were employed to introduce fluorescent tags such as dansyl and dapoxyl moieties. Resulting derivatives in the D-xylo, D-gluco, D-galacto as well as GlcNAc series showed distinctly improved glycosidase inhibitory activities compared to parent compounds and are designed to be useful analytical tools. (C) 2006 Elsevier Ltd. All rights reserved.
N-Alkylated Derivatives of 1,5-Dideoxy-1,5-iminoxylitol as Β-Xylosidaseand Β-Glucosidase Inhibitors
摘要:
A range of lipophilic derivatives of the D-xylosidase inhibitor 1,5-dideoxy-1,5-iminoxylitol was synthesized by N-alkylation of the parent compound with different alkyl halides. Inhibitory activities of the products obtained were measured with beta-glucosidase from Agrobacterium sp., a family I enzyme, as well as with beta-xylosidase from Thermoanaerobacterium saccharolyticum belonging to family 39 of the glycohydrolases. Whereas the former enzyme, which has low beta-xylosidase activity, was only moderately inhibited, with K-i values in the millimolar range, good inhibition was observed with the latter one. Inhibitors with terminally functionalized N-alkyl chains open up opportunities for novel applications as affinity ligands as well as for various types of tagging for diagnostic purposes.