exo-Imino to endo-Iminocyclitol Rearrangement. A General Route to Five-Membered Antiviral Azasugars
摘要:
A facile synthesis is reported for five-membered iminocyclitols which allows for variation in stereochemistry at all the chiral centers, diverse C-1- and N-substitution, and the potential for a three-component combinatorial process. The key step is inversion at the C-4 stereocenter (L-lyxo sugar -> D-ribono azasugar). The exo-imino to endo-iminocyclitol process was extended to the D-lyxo and the D- and L-hexose series. Some analogues were found to be more potent than N-butyl DNJ and N-nonyl DNJ in antiviral activity.
exo-Imino to endo-Iminocyclitol Rearrangement. A General Route to Five-Membered Antiviral Azasugars
摘要:
A facile synthesis is reported for five-membered iminocyclitols which allows for variation in stereochemistry at all the chiral centers, diverse C-1- and N-substitution, and the potential for a three-component combinatorial process. The key step is inversion at the C-4 stereocenter (L-lyxo sugar -> D-ribono azasugar). The exo-imino to endo-iminocyclitol process was extended to the D-lyxo and the D- and L-hexose series. Some analogues were found to be more potent than N-butyl DNJ and N-nonyl DNJ in antiviral activity.
Combinatorial library approach to iminocyclitols with biological activity
申请人:Moriarity M. Robert
公开号:US20070088164A1
公开(公告)日:2007-04-19
A method of synthesizing stereochemically defined iminocyclitol comprises replacing an intraring oxygen in a cyclic sugar by an intraring imine to form an iminocyclitol, wherein said iminocyclitol has a defined stereochemical configuration different from a stereochemical configuration of the cyclic sugar. The invention also provides combinatorial libraries of iminocyclitol compounds, allowing for diverse C1 and N-substitution. In addition, provided are methods of treating viral infections with iminocyclitols compounds.
Inhibition of LuxS by S-ribosylhomocysteine analogues containing a [4-aza]ribose ring
作者:Venkata L.A. Malladi、Adam J. Sobczak、Tiffany M. Meyer、Dehua Pei、Stanislaw F. Wnuk
DOI:10.1016/j.bmc.2011.07.043
日期:2011.9
LuxS (S-ribosylhomocysteinase) catalyzes the cleavage of the thioether linkage of S-ribosylhomocysteine (SRH) to produce homocysteine and 4,5-dihydroxy-2,3-pentanedione (DPD), the precursor to a small signaling molecule that mediates interspecies bacterial communication called autoinducer 2 (AI-2). Inhibitors of LuxS should interfere with bacterial interspecies communication and potentially provide a novel class of antibacterial agents. In this work, SRH analogues containing substitution of a nitrogen atom for the endocyclic oxygen as well as various deoxyriboses were synthesized and evaluated for LuxS inhibition. Two of the [4-aza] SRH analogues showed modest competitive inhibition (K-I similar to 40 mu M), while most of the others were inactive. One compound that contains a hemiaminal moiety exhibited time-dependent inhibition, consistent with enzyme-catalyzed ring opening and conversion into a more potent species (K-I* = 3.5 mu M). The structure-activity relationship of the designed inhibitors highlights the importance of both the homocysteine and ribose moieties for high-affinity binding to LuxS active site. (C) 2011 Elsevier Ltd. All rights reserved.
<i>exo</i>-Imino to <i>endo</i>-Iminocyclitol Rearrangement. A General Route to Five-Membered Antiviral Azasugars
作者:Robert M. Moriarty、Carmen I. Mitan、Norica Branzǎ-Nichita、Kenneth R. Phares、Damon Parrish
DOI:10.1021/ol061071r
日期:2006.8.1
A facile synthesis is reported for five-membered iminocyclitols which allows for variation in stereochemistry at all the chiral centers, diverse C-1- and N-substitution, and the potential for a three-component combinatorial process. The key step is inversion at the C-4 stereocenter (L-lyxo sugar -> D-ribono azasugar). The exo-imino to endo-iminocyclitol process was extended to the D-lyxo and the D- and L-hexose series. Some analogues were found to be more potent than N-butyl DNJ and N-nonyl DNJ in antiviral activity.