Document Detail


WYE-120318, a ring contraction product of methylnaltrexone, and structure revision of coniothyrione.
MedLine Citation:
PMID:  23135875     Owner:  NLM     Status:  Publisher    
Abstract/OtherAbstract:
A contracted ring degradation product, WYE-120318 (compound 2), was discovered during the development phase for methylnaltrexone bromide (compound 1) drug substance. The compound was isolated by high-performance liquid chromatography fractionation, and its structure was determined by spectroscopic data analyses. WYE-120318 is formed from methylnaltrexone through a benzyl-benzilic acid type rearrangement reaction to yield an α-hydroxy-cyclopentanecarboxylic acid substructure. The proposed structure and the formation mechanism are confirmed by the synthesis of WYE-120318 from methylnaltrexone (compound 1). A similar benzyl-benzilic acid type rearrangement reaction can be envisioned as the biological origin of remisporine A (compound 3), a naturally occurring cyclopentadienyl compound that autocatalytically dimerizes to remisporine B (compound 4). The structure of remisporine A was deduced from its dimer 4. Coniothyione (compound 5) can be considered as the first example of a stable natural product bearing the remisporine A skeleton. However, the regiochemistry of the chlorosubstitution in the coniothyrione structure needs to be revised to compound 6 on the basis of the nuclear magnetic resonance data and biogenesis analysis. Copyright © 2012 John Wiley & Sons, Ltd.
Authors:
Fangming Kong; Tianmin Zhu; Weitao Pan; Russ Tsao; Thomas G Pagano; Bao Nguyen; Brian Marquez
Related Documents :
24740135 - Anti-oxidative defences are modulated differentially in three freshwater teleosts in re...
25093985 - An unusual piceatannol dimer from rheum austral d. don with antioxidant activity.
12413855 - Synthesis of silicon-containing azole derivatives with magnesium bromide diethyl ethera...
24012095 - Chemoenzymatic synthesis of α-l-rhamnosides using recombinant α-l-rhamnosidase from a...
2792845 - On the characteristics of the visible chemiluminescence following free radical lipid pe...
25238415 - Structure elucidation and cytotoxic evaluation of new polyacetylenes from a marine spon...
Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2012-11-8
Journal Detail:
Title:  Magnetic resonance in chemistry : MRC     Volume:  -     ISSN:  1097-458X     ISO Abbreviation:  Magn Reson Chem     Publication Date:  2012 Nov 
Date Detail:
Created Date:  2012-11-8     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  9882600     Medline TA:  Magn Reson Chem     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
Copyright Information:
Copyright © 2012 John Wiley & Sons, Ltd.
Affiliation:
Structure Elucidation Group, Pfizer Worldwide Research and Development, 445 East Point Road, Groton, CT, 06340, USA.
Export Citation:
APA/MLA Format     Download EndNote     Download BibTex
MeSH Terms
Descriptor/Qualifier:

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


Previous Document:  Antenatal management and outcomes of gastroschisis in the U.K.
Next Document:  Is fluorine-18-fluorodeoxyglucose positron emission tomography useful in monitoring the response to ...