<?xml version="1.0" encoding="ISO-8859-1"?><article xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
<front>
<journal-meta>
<journal-id>1870-249X</journal-id>
<journal-title><![CDATA[Journal of the Mexican Chemical Society]]></journal-title>
<abbrev-journal-title><![CDATA[J. Mex. Chem. Soc]]></abbrev-journal-title>
<issn>1870-249X</issn>
<publisher>
<publisher-name><![CDATA[Sociedad Química de México A.C.]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S1870-249X2011000400007</article-id>
<title-group>
<article-title xml:lang="en"><![CDATA[Preparation and Some Reactions with 3-(Quinolin-3-yl)-3-Oxopropanoic Acid]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Abass]]></surname>
<given-names><![CDATA[Mohamed]]></given-names>
</name>
<xref ref-type="aff" rid="A01"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Mohamed]]></surname>
<given-names><![CDATA[Elhossain A.]]></given-names>
</name>
<xref ref-type="aff" rid="A01"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Ismail]]></surname>
<given-names><![CDATA[Mostafa M.]]></given-names>
</name>
<xref ref-type="aff" rid="A01"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Mayas]]></surname>
<given-names><![CDATA[Aisha S.]]></given-names>
</name>
<xref ref-type="aff" rid="A02"/>
</contrib>
</contrib-group>
<aff id="A01">
<institution><![CDATA[,Ain Shams University Faculty of Education Department of Chemistry]]></institution>
<addr-line><![CDATA[Cairo ]]></addr-line>
<country>Egypt</country>
</aff>
<aff id="A02">
<institution><![CDATA[,Sana University Faculty of Education Department of Chemistry]]></institution>
<addr-line><![CDATA[Sana ]]></addr-line>
<country>Yemen</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>12</month>
<year>2011</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>12</month>
<year>2011</year>
</pub-date>
<volume>55</volume>
<numero>4</numero>
<fpage>224</fpage>
<lpage>232</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S1870-249X2011000400007&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S1870-249X2011000400007&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S1870-249X2011000400007&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="en"><p><![CDATA[Preparation of quinolinyl-3-oxopropanoic acid 2 was accomplished by hydrolysis of pyranoquinolinedione 1 in aqueous alkaline medium. The chemical behavior of this &#946;-keto acid 2 towards nitrosation, coupling with a diazonium salt, esterification, condensation with 2,2-dimethoxyethanamine, hydrazinolysis, Knoevenagel condensation with isatine, salisyaldehyde, 3-formylquinolones, and 3-formylchromone, was investigated. Also many of the products of these reactions were found obtainable using either pyranoquinolinedione 1 or &#946;-keto acid 2, under the same conditions.]]></p></abstract>
<abstract abstract-type="short" xml:lang="es"><p><![CDATA[La preparación del ácido quinolinil-3-oxopropanoico 2 se realizó por hidrólisis de la piranoquinolindiona 1 en medio acuoso alcalino. Se investigó el comportamiento químico de este &#946;-cetoácido 2 en reacciones de nitrosación, acoplamiento con sales de diazonio, esterificación, condensación con 2,2-dimethoxyethanamine, hidrazinólisis, condensación de Knoevenagel con isatina, salicilaldehido, 3-formilquinolones y 3-formilchromonas. Muchos de los productos de estas reacciones pueden obtenerse mediante el uso ya sea de la piranoquinolindiona 1 o del &#946;-cetoácido 2, bajo las mismas condiciones.]]></p></abstract>
<kwd-group>
<kwd lng="en"><![CDATA[Quinolin-2(1H)-one]]></kwd>
<kwd lng="en"><![CDATA[&#946;-Keto-carboxylic acid]]></kwd>
<kwd lng="en"><![CDATA[Pyrano[3,2-c&#093]]></kwd>
<kwd lng="en"><![CDATA[quinoline]]></kwd>
<kwd lng="en"><![CDATA[Knoevenagel condensation]]></kwd>
<kwd lng="en"><![CDATA[heterocyclization reactions]]></kwd>
<kwd lng="es"><![CDATA[Quinolin-2(1H)-ona]]></kwd>
<kwd lng="es"><![CDATA[ácido &#946;-ceto-carboxílico]]></kwd>
<kwd lng="es"><![CDATA[pirano [3,2-c&#093]]></kwd>
<kwd lng="es"><![CDATA[quinolina]]></kwd>
<kwd lng="es"><![CDATA[condensación de Knoevenagel]]></kwd>
<kwd lng="es"><![CDATA[reacciones de heterociclización]]></kwd>
</kwd-group>
</article-meta>
</front><body><![CDATA[ <p align="justify"><font face="verdana" size="4">Article</font></p>     <p align="justify"><font face="verdana" size="4">&nbsp;</font></p>     <p align="center"><font face="verdana" size="4"><b>Preparation and Some Reactions with 3&#150;(Quinolin&#150;3&#150;yl)&#150;3&#150;Oxopropanoic Acid</b></font></p>     <p align="center"><font face="verdana" size="2">&nbsp;</font></p>     <p align="center"><font face="verdana" size="2"><b>Mohamed Abass,<sup>1</sup>* Elhossain A. Mohamed,<sup>1</sup> Mostafa M. Ismail,<sup>1</sup> and Aisha S. Mayas<sup>2</sup></b></font></p>     <p align="justify"><font face="verdana" size="2">&nbsp;</font></p>     <p align="justify"><font face="verdana" size="2"><i><sup>1</sup> Department of Chemistry, Faculty of Education, Ain Shams University, Roxy, Postal Code 11757, Cairo, Egypt. Tel.: +201093694622.</i> <a href="mailto:m.abass@chemist.com">m.abass@chemist.com</a></font></p>     <p align="justify"><font face="verdana" size="2"><i><sup>2</sup> Department of Chemistry, Faculty of Education, Sana University, Sana, Yemen.</i></font></p>     <p align="justify"><font face="verdana" size="2">&nbsp;</font></p>     <p align="justify"><font face="verdana" size="2">Received May 10, 2011.    ]]></body>
<body><![CDATA[<br> Accepted August 25, 2011.</font></p>     <p align="justify"><font face="verdana" size="2">&nbsp;</font></p>     <p align="justify"><font face="verdana" size="2"><b>Abstract</b></font></p>     <p align="justify"><font face="verdana" size="2">Preparation of quinolinyl&#150;3&#150;oxopropanoic acid <b>2 </b>was accomplished by hydrolysis of pyranoquinolinedione <b>1 </b>in aqueous alkaline medium. The chemical behavior of this &#946;&#150;keto acid <b>2 </b>towards nitrosation, coupling with a diazonium salt, esterification, condensation with 2,2&#150;dimethoxyethanamine, hydrazinolysis, Knoevenagel condensation with isatine, salisyaldehyde, 3&#150;formylquinolones, and 3&#150;formylchromone, was investigated. Also many of the products of these reactions were found obtainable using either pyranoquinolinedione <b>1 </b>or &#946;&#150;keto acid <b>2, </b>under the same conditions.</font></p>     <p align="justify"><font face="verdana" size="2"><b>Key words: </b>Quinolin&#150;2(1<i>H</i>)&#150;one, &#946;&#150;Keto&#150;carboxylic acid, Pyrano&#91;3,2&#150;<i>c</i>&#93;quinoline, Knoevenagel condensation, heterocyclization reactions.</font></p>     <p align="justify"><font face="verdana" size="2">&nbsp;</font></p>     <p align="justify"><font face="verdana" size="2"><b>Resumen</b></font></p>     <p align="justify"><font face="verdana" size="2">La preparaci&oacute;n del &aacute;cido quinolinil&#150;3&#150;oxopropanoico <b>2 </b>se realiz&oacute; por hidr&oacute;lisis de la piranoquinolindiona <b>1 </b>en medio acuoso alcalino. Se investig&oacute; el comportamiento qu&iacute;mico de este &#946;&#150;ceto&aacute;cido <b>2 </b>en reacciones de nitrosaci&oacute;n, acoplamiento con sales de diazonio, esterificaci&oacute;n, condensaci&oacute;n con 2,2&#150;dimethoxyethanamine, hidrazin&oacute;lisis, condensaci&oacute;n de Knoevenagel con isatina, salicilaldehido, 3&#150;formilquinolones y 3&#150;formilchromonas. Muchos de los productos de estas reacciones pueden obtenerse mediante el uso ya sea de la piranoquinolindiona <b>1 </b>o del &#946;&#150;ceto&aacute;cido <b>2, </b>bajo las mismas condiciones. </font></p>     <p align="justify"><font face="verdana" size="2"><b>Palabras clave: </b>Quinolin&#150;2(1<i>H</i>)&#150;ona, &aacute;cido &#946;&#150;ceto&#150;carbox&iacute;lico, pirano &#91;3,2<i>&#150;c</i>&#93; quinolina, condensaci&oacute;n de Knoevenagel, reacciones de heterociclizaci&oacute;n.</font></p>     <p align="justify"><font face="verdana" size="2">&nbsp;</font></p>     ]]></body>
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