Linked Life Data

12852759

Source:http://linkedlifedata.com/resource/pubmed/id/12852759

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
15
pubmed:dateCreated
2003-7-10
pubmed:abstractText
The synthesis and biological evaluation of a bicyclo[3.1.0]hexene nucleoside designed as a conformational mimic of the anti-HIV agent stavudine (1, D4T) is described. The unsaturated methanocarbocyclic pseudosugar of N-MCD4T (2) was constructed from an iodo-substituted precursor by a DBU-catalyzed olefination reaction. Mitsunobu coupling with N(3)-benzoylthymine afforded the desired target after deprotection. Both D4T and N-MCD4T are in the North (N) hemisphere of the pseudorotational cycle but 70 degrees away from a perfect N (P = 0 degrees ) conformation toward the East and West hemispheres, respectively. Despite this large difference, the double bond reduces the puckering amplitude (nu(max)) of N-MCD4T to 6.81 degrees, and the superposition of both structures showed a RMS deviation of only 0.039 A. The combined structural analysis of P and nu(max) shows that while the value of P may differ substantially, the low nu(max) resolves the differences and becomes the dominant pseudorotational parameter. N-MCD4T is active against HIV-1 and HIV-2 in CEM, MT-2, and MT-4 cells, and while it is somewhat less potent than D4T, it also appears to be less toxic. The triphosphate (N-MCD4TTP) inhibits HIV reverse transcriptase with a 10-fold higher IC(50) than D4TTP. By virtue of its carbocyclic nature, N-MCD4T (2) is a more robust molecule stable to conditions that would cleave D4T.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Jul
pubmed:issn
0022-2623
pubmed:author
pubmed:issnType
Print
pubmed:day
17
pubmed:volume
46
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
3292-9
pubmed:dateRevised
2007-11-15
pubmed:meshHeading
pubmed:year
2003
pubmed:articleTitle
A conformationally locked analogue of the anti-HIV agent stavudine. An important correlation between pseudorotation and maximum amplitude.
pubmed:affiliation
Laboratory of Medicinal Chemistry, Center for Cancer Research, National Cancer Institute-Frederick, National Institutes of Health, Frederick, Maryland 21702, USA.
pubmed:publicationType
Journal Article