<?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>S1870-249X2005000300008</article-id>
<title-group>
<article-title xml:lang="en"><![CDATA[Eco-friendly Conditions for the Production of 1,3-Dithianes Using Microwave Irradiation]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Ballesteros]]></surname>
<given-names><![CDATA[Lidia]]></given-names>
</name>
<xref ref-type="aff" rid="A01"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Noguez]]></surname>
<given-names><![CDATA[Olivia]]></given-names>
</name>
<xref ref-type="aff" rid="A01"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Arroyo]]></surname>
<given-names><![CDATA[Gabriel]]></given-names>
</name>
<xref ref-type="aff" rid="A01"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Velasco]]></surname>
<given-names><![CDATA[Benjamín]]></given-names>
</name>
<xref ref-type="aff" rid="A01"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Delgado]]></surname>
<given-names><![CDATA[Francisco]]></given-names>
</name>
<xref ref-type="aff" rid="A02"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Miranda]]></surname>
<given-names><![CDATA[René]]></given-names>
</name>
<xref ref-type="aff" rid="A01"/>
</contrib>
</contrib-group>
<aff id="A01">
<institution><![CDATA[,Universidad Nacional Autónoma de México Facultad de Estudios Superiores Cuautitlán 1 Departamento de Ciencias Químicas]]></institution>
<addr-line><![CDATA[México Distrito Federal]]></addr-line>
<country>México</country>
</aff>
<aff id="A02">
<institution><![CDATA[,Instituto Politécnico Nacional Escuela Nacional de Ciencias Biológicas Departamento de Química Orgánica]]></institution>
<addr-line><![CDATA[México Distrito Federal]]></addr-line>
<country>México</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>00</month>
<year>2005</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>00</month>
<year>2005</year>
</pub-date>
<volume>49</volume>
<numero>3</numero>
<fpage>302</fpage>
<lpage>306</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S1870-249X2005000300008&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S1870-249X2005000300008&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S1870-249X2005000300008&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="en"><p><![CDATA[The reaction of a number of aldehydes and ketones with 1,3-propanedithiol has been carried out in the absence of solvent, using microwave irradiation as the heat source. Under these conditions the corresponding 1,3-dithianes were obtained in short reaction times (5 min). In addition, a bentonitic clay was evaluated as promoter of this reaction.]]></p></abstract>
<abstract abstract-type="short" xml:lang="es"><p><![CDATA[La reacción entre varios aldehídos y cetonas con 1,3-propanditiol se llevó a cabo en la ausencia de disolvente, utilizando irradiación de microondas como fuente de calor. Bajo estas condiciones, se obtuvieron los correspondientes 1,3-ditianos, en tiempos cortos de reacción (5 min). Complementariamente, se evaluó la capacidad de una arcilla bentonitíca como promotora de esta reacción.]]></p></abstract>
<kwd-group>
<kwd lng="en"><![CDATA[Green chemistry]]></kwd>
<kwd lng="en"><![CDATA[1,3-dithianes]]></kwd>
<kwd lng="en"><![CDATA[bentonitic clay]]></kwd>
<kwd lng="en"><![CDATA[microwave irradiation]]></kwd>
<kwd lng="es"><![CDATA[Química verde]]></kwd>
<kwd lng="es"><![CDATA[1,3-ditianos]]></kwd>
<kwd lng="es"><![CDATA[arcilla bentonítica]]></kwd>
<kwd lng="es"><![CDATA[radiación de microondas]]></kwd>
</kwd-group>
</article-meta>
</front><body><![CDATA[  	    <p align="justify"><font face="verdana" size="4">Article</font></p>  	    <p align="justify">&nbsp;</p>  	    <p align="center"><font face="verdana" size="4"><b>Eco&#45;friendly Conditions for the Production of 1,3&#45;Dithianes Using Microwave Irradiation</b></font></p>     <p align="center">&nbsp;</p>  	    <p align="center"><font face="verdana" size="2"><b>Lidia Ballesteros,<sup>1</sup> Olivia Noguez,<sup>1</sup> Gabriel Arroyo,<sup>1</sup> Benjam&iacute;n Velasco,<sup>1</sup> Francisco Delgado,<sup>2</sup> and Ren&eacute; Miranda*<sup>1</sup></b></font></p>     <p align="center">&nbsp;</p>      <p align="justify"><font face="verdana" size="2"><sup><i>1</i></sup><i>&nbsp;Departamento de Ciencias Qu&iacute;micas, Facultad de Estudios Superiores Cuautitl&aacute;n, Universidad Nacional Aut&oacute;noma de M&eacute;xico. Av. Primero de Mayo s/n, Cuautitl&aacute;n Izcalli C.P. 54740, Estado de M&eacute;xico, M&eacute;xico. Tel/fax 00 52 5 6232056, </i>e&#45;mail <a href="mailto:mirruv@yahoo.com.mx" target="_blank">mirruv@yahoo.com.mx</a></font></p>     <p align="justify"><font face="verdana" size="2"><sup><i>2</i></sup><i>&nbsp;Departamento de Qu&iacute;mica Org&aacute;nica, Escuela Nacional de Ciencias Biol&oacute;gicas, Instituto Polit&eacute;cnico Nacional, Prolongaci&oacute;n Carpio y Plan de Ayala, Casco de Santo Tom&aacute;s, M&eacute;xico D.F., C.P. 04510, M&eacute;xico.</i></font></p>     <p align="justify">&nbsp;</p>      ]]></body>
<body><![CDATA[<p align="justify"><font face="verdana" size="2">Recibido el 31 de mayo del 2005.     <br> Aceptado el 30 de septiembre del 2006.</font></p>     <p align="justify">&nbsp;</p>      <p align="justify"><font face="verdana" size="2"><b>Abstract</b></font></p>     <p align="justify"><font face="verdana" size="2"> The reaction of a number of aldehydes and ketones with 1,3&#45;propanedithiol has been carried out in the absence of solvent, using microwave irradiation as the heat source. Under these conditions the corresponding 1,3&#45;dithianes were obtained in short reaction times (5 min). In addition, a bentonitic clay was evaluated as promoter of this reaction.</font></p>      <p align="justify"><font face="verdana" size="2"><b>Key words:</b> Green chemistry; 1,3&#45;dithianes; bentonitic clay; microwave irradiation.</font></p> 	    <p align="justify">&nbsp;</p>      <p align="justify"><font face="verdana" size="2"><b>Resumen</b></font></p>     <p align="justify"><font face="verdana" size="2"> La reacci&oacute;n entre varios aldeh&iacute;dos y cetonas con 1,3&#45;propanditiol se llev&oacute; a cabo en la ausencia de disolvente, utilizando irradiaci&oacute;n de microondas como fuente de calor. Bajo estas condiciones, se obtuvieron los correspondientes 1,3&#45;ditianos, en tiempos cortos de reacci&oacute;n (5 min). Complementariamente, se evalu&oacute; la capacidad de una arcilla bentonit&iacute;ca como promotora de esta reacci&oacute;n.</font></p>  	    <p align="justify"><font face="verdana" size="2"><b>Palabras clave:</b> Qu&iacute;mica verde; 1,3&#45;ditianos; arcilla benton&iacute;tica; radiaci&oacute;n de microondas.</font></p>     ]]></body>
<body><![CDATA[<p align="justify">&nbsp;</p>  	    <p align="justify"><font face="verdana" size="2"><a href="../pdf/jmcs/v49n3/v49n3a8.pdf" target="_blank">DESCARGAR ART&Iacute;CULO EN FORMATO PDF</a></font></p> 	    <p align="justify">&nbsp;</p>     <p align="justify"><font face="verdana" size="2"><b>Acknowledgements</b></font></p>  	    <p align="justify"><font face="verdana" size="2">The authors thank DGAPA&#45;UNAM for financial support, </font><font face="verdana" size="2">(grant number IN&#45;208202).</font></p> 	    <p align="justify">&nbsp;</p>     <p align="justify"><font face="verdana" size="2"><b>References</b></font></p>     <!-- ref --><p align="justify"><font face="verdana" size="2">1.&nbsp;Anastas, P. T.; Williamson, T. 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