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    <title>Depth-First: Tag axialchirality</title>
    <link>http://depth-first.com/articles/tag/axialchirality</link>
    <language>en-us</language>
    <ttl>40</ttl>
    <description>Walking the Web of Chemical Informatics</description>
    <item>
      <title>Extending InChI Stereochemistry</title>
      <description>&lt;p&gt;&lt;a href="http://www.reuters.com/article/pressRelease/idUS195509+17-Jun-2008+BW20080617"&gt;As covered by Reuters&lt;/a&gt; and many other wire services, &lt;a href="http://artuslabs.com"&gt;ArtusLabs&lt;/a&gt; and Boston University's &lt;a href="http://depth-first.com/articles/2007/06/18/yet-another-free-chemical-database-reaction-searching-with-cmld-bu"&gt;CMLD&lt;/a&gt; have teamed up to extend InChI's stereochemistry support:&lt;/p&gt;

&lt;blockquote&gt;
    &lt;p&gt;DURHAM, N.C.--(Business Wire)--
    ArtusLabs, Inc., a leading provider of life science software tools
    and data management solutions, has entered into a partnership with
    Boston University's Center for Chemical Methodology and Library
    Development (CMLD) to develop a way to standardize and expand the way
    in which stereochemistry, and ultimately a three-dimensional
    structures, are represented in the International Chemical Identifier
    (InChI(TM)).&lt;/p&gt;
&lt;/blockquote&gt;

&lt;p&gt;With the increasing use of molecules containing &lt;a href="http://depth-first.com/articles/2007/01/08/the-axial-chirality-problem"&gt;axial chirality&lt;/a&gt; , &lt;a href="http://depth-first.com/articles/2007/01/22/a-molecular-language-for-modern-chemistry-flexmol-and-planar-chiral-metacyclophanes"&gt;planar chirality&lt;/a&gt; and other forms of non-tetrahedral stereogenicity in chemistry, the move by ArtusLabs and CMLD could be significant.&lt;/p&gt;

&lt;p&gt;Put simply, the ability of cheminformatics to represent certain kinds of compounds has fallen way behind the ability of chemistry to make them. While molecules once considered mere oddities 30 years ago continue to pour into corporate compound collections, laboratory notebooks, and product catalogs, cheminformatics has been stuck with a form of molecular representation that hasn't changed significantly in several decades.&lt;/p&gt;

&lt;p&gt;InChI isn't alone. All three of the most widely-used molecular representation systems now in use (Molfile, SMILES, and CML) suffer from fundamental limitations in representing axial chirality, planar chirality, and &lt;a href="http://depth-first.com/articles/2006/12/19/ferrocene-and-beyond-a-solution-to-the-molecular-representation-problem"&gt;multicenter bonding&lt;/a&gt;.&lt;/p&gt;

&lt;p&gt;The kind of work being undertaken by ArtusLabs and CMLD is essential if cheminformatics is to continue to keep pace with new developments in chemistry.&lt;/p&gt;</description>
      <pubDate>Wed, 09 Jul 2008 10:18:00 +0000</pubDate>
      <guid isPermaLink="false">urn:uuid:4c49e622-4ad4-47de-85b6-d62bb88773dc</guid>
      <author>Rich Apodaca</author>
      <link>http://depth-first.com/articles/2008/07/09/extending-inchi-stereochemistry</link>
      <category>Tools</category>
      <category>flexmol</category>
      <category>axialchirality</category>
      <category>planarchirality</category>
      <category>artuslabs</category>
      <category>inchi</category>
      <category>molfile</category>
      <category>smiles</category>
      <category>cmld</category>
    </item>
    <item>
      <title>How Would Your Cheminformatics Tool Do This?</title>
      <description>&lt;p&gt;&lt;center&gt;&lt;img src="http://depth-first.com/demo/20080217/abstract.png"&gt;&lt;/img&gt;&lt;/center&gt;&lt;/p&gt;

&lt;p&gt;&lt;em&gt;Source: Lunazzi, Mancinelli, and Mazzanti &lt;a href="http://dx.doi.org/10.1021/jo702502n"&gt;J. Org. Chem.&lt;/a&gt;&lt;/em&gt;&lt;/p&gt;</description>
      <pubDate>Mon, 18 Feb 2008 10:03:00 +0000</pubDate>
      <guid isPermaLink="false">urn:uuid:26f4839a-81c3-48a8-9ea3-031d7daf5957</guid>
      <author>Rich Apodaca</author>
      <link>http://depth-first.com/articles/2008/02/18/how-would-your-cheminformatics-tool-do-this</link>
      <category>Tools</category>
      <category>flexmol</category>
      <category>axialchirality</category>
    </item>
    <item>
      <title>How Would Your Cheminformatics Tool Do This?</title>
      <description>&lt;p&gt;&lt;center&gt;&lt;a href="http://dx.doi.org/10.1021/ol702952n"&gt;&lt;img src="http://depth-first.com/demo/20080205/abstract.png"&gt;&lt;/img&gt;&lt;/a&gt;&lt;/center&gt;&lt;/p&gt;

&lt;p&gt;&lt;center&gt;&lt;em&gt;Source: Hughes, Prieto-Davo, Jensen, and Fenical &lt;a href="http://dx.doi.org/10.1021/ol702952n"&gt;Org. Lett.&lt;/a&gt;&lt;/em&gt;&lt;/center&gt;&lt;/p&gt;</description>
      <pubDate>Tue, 05 Feb 2008 11:15:00 +0000</pubDate>
      <guid isPermaLink="false">urn:uuid:2b91bf7c-8504-4a57-b37c-391932523eaf</guid>
      <author>Rich Apodaca</author>
      <link>http://depth-first.com/articles/2008/02/05/how-would-your-cheminformatics-tool-do-this</link>
      <category>Tools</category>
      <category>axialchirality</category>
      <category>bispyrrole</category>
      <category>flexmol</category>
    </item>
    <item>
      <title>How Would Your Cheminformatics Tool Do This?</title>
      <description>&lt;p&gt;&lt;center&gt;&lt;a href="http://dx.doi.org/10.1021/ol702783v"&gt;&lt;img src="http://depth-first.com/demo/20080118/abstract.png"&gt;&lt;/img&gt;&lt;/a&gt;&lt;/center&gt;&lt;/p&gt;

&lt;p&gt;&lt;em&gt;Reference:  Ishikawa, Shimasaki, Skashi, and Toyota &lt;a href="http://dx.doi.org/10.1021/ol702783v"&gt;Organic Letters&lt;/a&gt;&lt;/em&gt;&lt;/p&gt;</description>
      <pubDate>Fri, 18 Jan 2008 09:32:00 +0000</pubDate>
      <guid isPermaLink="false">urn:uuid:2f0a6860-bab8-4f15-9ca2-99c166fef9ba</guid>
      <author>Rich Apodaca</author>
      <link>http://depth-first.com/articles/2008/01/18/how-would-your-cheminformatics-tool-do-this</link>
      <category>Tools</category>
      <category>flexmol</category>
      <category>planarchirality</category>
      <category>axialchirality</category>
    </item>
    <item>
      <title>How Would Your Cheminformatics Tool Do This?</title>
      <description>&lt;p&gt;&lt;center&gt;&lt;a href="http://dx.doi.org/10.1016/j.tetlet.2007.09.079"&gt;&lt;img src="http://depth-first.com/demo/20071217/abstract.png"&gt;&lt;/img&gt;&lt;/a&gt;&lt;/center&gt;&lt;/p&gt;

&lt;p&gt;&lt;em&gt;Reference: Lyubimov, Tyutyunov, Kalinin, Said-Galiev, Khokhlov, Petrovskii, and Davankov - &lt;a href="http://dx.doi.org/10.1016/j.tetlet.2007.09.079"&gt;Tetrahedron Lett.&lt;/a&gt;&lt;/em&gt;&lt;/p&gt;</description>
      <pubDate>Mon, 17 Dec 2007 10:00:00 +0000</pubDate>
      <guid isPermaLink="false">urn:uuid:771e42b0-ce36-4ab3-8eb9-633bb7d62f3d</guid>
      <author>Rich Apodaca</author>
      <link>http://depth-first.com/articles/2007/12/17/how-would-your-cheminformatics-tool-do-this</link>
      <category>flexmol</category>
      <category>axialchirality</category>
      <category>carborane</category>
      <category>aromaticity</category>
    </item>
    <item>
      <title>How Would Your Cheminformatics Tool Do This?</title>
      <description>&lt;p&gt;&lt;center&gt;&lt;a href="http://dx.doi.org/10.1021/np070269x"&gt;&lt;img src="http://depth-first.com/demo/20071123/abstract.png"&gt;&lt;/img&gt;&lt;/a&gt;&lt;/center&gt;&lt;/p&gt;

&lt;p&gt;&lt;em&gt;Reference: Li, Wang, Yang, and Kitanaka, &lt;a href="http://dx.doi.org/10.1021/np070269x"&gt;J. Nat. Prod.&lt;/a&gt;&lt;/em&gt;&lt;/p&gt;</description>
      <pubDate>Fri, 23 Nov 2007 09:44:00 +0000</pubDate>
      <guid isPermaLink="false">urn:uuid:8bb0365d-a90e-4574-a903-b99f7fc9c16c</guid>
      <author>Rich Apodaca</author>
      <link>http://depth-first.com/articles/2007/11/23/how-would-your-cheminformatics-tool-do-this</link>
      <category>Tools</category>
      <category>axialchirality</category>
      <category>flexmol</category>
    </item>
    <item>
      <title>How Would Your Cheminformatics Tool Do This?</title>
      <description>&lt;p&gt;&lt;center&gt;&lt;a href="http://dx.doi.org/10.1021/jo701764e"&gt;&lt;img src="http://depth-first.com/demo/20071108/abstract.png"&gt;&lt;/img&gt;&lt;/a&gt;&lt;/center&gt;&lt;/p&gt;

&lt;p&gt;&lt;em&gt;Reference: Shi, Ma, and Gao, &lt;a href="http://dx.doi.org/10.1021/jo701764e"&gt;J. Org. Chem.&lt;/a&gt;&lt;/em&gt;&lt;/p&gt;</description>
      <pubDate>Thu, 08 Nov 2007 08:51:00 +0000</pubDate>
      <guid isPermaLink="false">urn:uuid:66c10f62-1ee0-4be8-bc05-ece9ae85443c</guid>
      <author>Rich Apodaca</author>
      <link>http://depth-first.com/articles/2007/11/08/how-would-your-cheminformatics-tool-do-this</link>
      <category>Tools</category>
      <category>axialchirality</category>
      <category>flexmol</category>
    </item>
    <item>
      <title>How Would Your Cheminformatics Tool Do This?</title>
      <description>&lt;p&gt;&lt;center&gt;&lt;a href="http://dx.doi.org/10.1021/np070337f"&gt;&lt;img src="http://depth-first.com/demo/20071105/abstract.png"&gt;&lt;/img&gt;&lt;/a&gt;&lt;/center&gt;&lt;/p&gt;

&lt;p&gt;&lt;em&gt;Reference: Dai, Liu, Zhou, and Nagle &lt;a href="http://dx.doi.org/10.1021/np070337f"&gt;J. Nat. Prod.&lt;/a&gt;&lt;/em&gt;&lt;/p&gt;</description>
      <pubDate>Mon, 05 Nov 2007 08:27:00 +0000</pubDate>
      <guid isPermaLink="false">urn:uuid:1471ce6f-bb50-4a15-9b07-a19ddd881199</guid>
      <author>Rich Apodaca</author>
      <link>http://depth-first.com/articles/2007/11/05/how-would-your-cheminformatics-tool-do-this</link>
      <category>Meta</category>
      <category>flexmol</category>
      <category>axialchirality</category>
    </item>
    <item>
      <title>Can Your Cheminformatics Tool Do This?</title>
      <description>&lt;p&gt;&lt;a href="http://dx.doi.org/10.1021/ol071276f"&gt;&lt;center&gt;&lt;img src="http://depth-first.com/demo/20071002/binol.png"&gt;&lt;/img&gt;&lt;/center&gt;&lt;/a&gt;&lt;/p&gt;</description>
      <pubDate>Tue, 02 Oct 2007 10:10:00 +0000</pubDate>
      <guid isPermaLink="false">urn:uuid:6a257c65-0081-485d-b624-5aa282ba0e66</guid>
      <author>Rich Apodaca</author>
      <link>http://depth-first.com/articles/2007/10/02/can-your-cheminformatics-tool-do-this</link>
      <category>Tools</category>
      <category>axialchirality</category>
      <category>flexmol</category>
      <category>binol</category>
    </item>
    <item>
      <title>Can Your Cheminformatics Tool Do This?</title>
      <description>&lt;p&gt;&lt;center&gt;&lt;a href="http://dx.doi.org/10.1021/ol070936d"&gt;&lt;img src="http://depth-first.com/demo/20070613/allenes.gif" border="0"&gt;&lt;/img&gt;&lt;/a&gt;&lt;/center&gt;&lt;/p&gt;</description>
      <pubDate>Wed, 13 Jun 2007 08:36:00 +0000</pubDate>
      <guid isPermaLink="false">urn:uuid:6e600510-2b9a-46f1-8267-227cffedac99</guid>
      <author>Rich Apodaca</author>
      <link>http://depth-first.com/articles/2007/06/13/can-your-cheminformatics-tool-do-this</link>
      <category>Web</category>
      <category>flexmol</category>
      <category>octet</category>
      <category>axialchirality</category>
      <category>dietz</category>
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