title: Synthesis of polyhydroxy piperidines and their analogues: a novel approach towards selective inhibitors of alpha-glucosidase.
abstract: Various polyhydroxy piperidine azasugars have been synthesized from precursors 18a and 18b, obtained in both enantiomeric forms from d-ribose. Out of these polyhydroxy piperidine azasugars, 22, 39 and 20 were found to be potent as well as selective inhibitors of alpha-glucosidase with K(i) values ranging as low as 1.07 microM, 16.4 microM, and 88.2 microM, respectively. Replacement of the hydroxy methylene moiety of (K(i) 33% at 1 mM) by an amino methylene moiety (32, K(i) 36.8 microM) showed a remarkable increase in the activity (almost 30 times). Furthermore, increasing the lipophilicity of by N-alkylation with a dodecyl group (36) showed a three-fold enhancement in the activity (K(i) 217 microM to K(i) 72.3 microM).
authors.affiliation: Organic Chemistry Division, National Chemical Laboratory, Pune-411008, India. gp.pandey@ncl.res.in
authors.forename: Ganesh
authors.initials: G
authors.lastname: Pandey
authors.forename: Kishor Chandra
authors.initials: KC
authors.lastname: Bharadwaj
authors.forename: M Islam
authors.initials: MI
authors.lastname: Khan
authors.forename: K S
authors.initials: KS
authors.lastname: Shashidhara
authors.forename: Vedavati G
authors.initials: VG
authors.lastname: Puranik
mesh_terms: D001230:Aspergillus / Q000187:drug effects / Q000201:enzymology; D004791:Enzyme Inhibitors / Q000138:chemical synthesis* / Q000737:chemistry / Q000494:pharmacology*; D065089:Glycoside Hydrolase Inhibitors; D010880:Piperidines / Q000138:chemical synthesis* / Q000737:chemistry / Q000494:pharmacology*; D013379:Substrate Specificity
chemical_list: D004791:Enzyme Inhibitors; D065089:Glycoside Hydrolase Inhibitors; D010880:Piperidines