Synthesis and biological evaluation of N-(2-fluorophenyl)-2β-deoxyfuconojirimycin acetamide as a potent inhibitor for α-l-fucosidases
摘要:
In this study we revealed that the addition of an N-phenylacetamide substituent to the C-1 position of 1-deoxyfuconojirimycin (DFJ) can lead to highly potent inhibitors of alpha-L-fucosidases. A structure-activity relationship study showed that a fluoro group on the phenyl ring greatly increased its potency and selectivity. In contrast the addition of two or three fluoro groups decreased their inhibition potency. Consequently, N-(2-fluorophenyl)-2 beta-DFJ acetamide (18j) was found to display very potent and selective inhibition of bovine kidney, rat epididymis, and human lysosome alpha-L-fucosidases, with IC50 value of 0.012, 0.044, and 0.0079 mu M respectively. It is noteworthy that our designed N-phenyL-2 beta-DFJ acetamide derivative exhibited about 18-fold stronger effects on human lysosomal alpha-L-fucosidase than original DFJ and it occupied the active-site of this enzyme. We therefore expect that this compound may find applications in new therapeutic trials against genetic deficiency disorders. (C) 2013 Elsevier Ltd. All rights reserved.
Imino Glycals via Ruthenium-Catalyzed RCM and Isomerization
作者:Bernd Schmidt、Sylvia Hauke、Nino Mühlenberg
DOI:10.1055/s-0033-1338615
日期:——
enamides via a ruthenium-catalyzed assisted tandem catalytic ring-closing metathesis–isomerization sequence. The sequence relies on the in situ transformation of a metathesis active Ru–carbene into an isomerization active Ru–hydride by addition of hydroxide as a chemical trigger. N-Allyl-N-homoallylamines were converted in one step into cyclic enamides via a ruthenium-catalyzed assisted tandem catalytic
Diastereoselective C-2-elongation processes of N-mono- 1a-c and N,N-diprotected 1d-f L-alaninals, using vinylmagnesium bromide and chloride, are described. A substantial difference between effects of the N-protecting groups replacing either one or two amino protons was observed. (C) 1997 Elsevier Science Ltd. All rights reserved.