<?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>2304-0106</journal-id>
<journal-title><![CDATA[Anales de la Academia de Ciencias de Cuba]]></journal-title>
<abbrev-journal-title><![CDATA[Anales de la ACC]]></abbrev-journal-title>
<issn>2304-0106</issn>
<publisher>
<publisher-name><![CDATA[Academia de Ciencias de Cuba]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S2304-01062023000400010</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Síntesis de heterociclos funcionalizados usando reacciones catalizadas por paladio, metátesis y cicloisomerización mediada por ácido]]></article-title>
<article-title xml:lang="en"><![CDATA[Synthesis of functionalized heterocycles by palladium-catalyzed reactions, metathesis and acid mediated cycloisomerization]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Perdomo Rivera]]></surname>
<given-names><![CDATA[Rodisnel]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Blanco Ponce]]></surname>
<given-names><![CDATA[Marian]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Torres Rodríguez]]></surname>
<given-names><![CDATA[Eugenio]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Ehlers]]></surname>
<given-names><![CDATA[Peter]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Langer]]></surname>
<given-names><![CDATA[Peter]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad de Granma Facultad de Ciencias Técnicas Centro de Estudios de Química Aplicada]]></institution>
<addr-line><![CDATA[Granma ]]></addr-line>
<country>Cuba</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Universidad de Rostock Instituto de Química ]]></institution>
<addr-line><![CDATA[Rostock ]]></addr-line>
<country>Alemania</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>12</month>
<year>2023</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>12</month>
<year>2023</year>
</pub-date>
<volume>13</volume>
<numero>4</numero>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://scielo.sld.cu/scielo.php?script=sci_arttext&amp;pid=S2304-01062023000400010&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://scielo.sld.cu/scielo.php?script=sci_abstract&amp;pid=S2304-01062023000400010&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://scielo.sld.cu/scielo.php?script=sci_pdf&amp;pid=S2304-01062023000400010&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[RESUMEN  Introducción:  Los compuestos heterociclos nitrogenados, específicamente los derivados de la piridina, son ampliamente utilizados en diferentes ramas de la ciencia con especial interés en el campo de la ciencia de los materiales y la industria farmacéutica, donde han alcanzado su máxima aplicación por sus propiedades antimaláricas, relajante muscular, depresivo cardiaco y anticancerígenas. Los objetivos del trabajo son sintetizar nuevos derivados piridínicos y quinolínicos de interés en la ciencia de los materiales y en la industria farmacéutica mediante reacciones catalizadas por paladio, metátesis y cicloisomerización mediada por ácido; aislar, purificar y caracterizar estructuralmente estos compuestos y evaluar la actividad inhibitoria selectiva contra ecto-5'-nucleotidasa y óptica de los compuestos promisorios seleccionados.  Métodos:  Se establecieron para las síntesis reacciones selectivas de acoplamiento cruzado Suzuki, Sonogashira y reacciones de aminación Buchwald-Hartwig, metátesis carbonilo-alquino y cicloisomerización mediada por ácido. Estos compuestos fueron purificados y caracterizados utilizando técnicas cromatográficas, espectroscópicas y espectrométricas. Las propiedades ópticas fueron evaluadas por espectroscopía ultravioleta visible y de fluorescencia. La actividad inhibitoria selectiva contra ecto-5'-nucleotidasa fue determinada a través de electroforesis capilar.  Resultados:  Se obtuvieron 231 nuevos compuestos con buenos rendimientos. Fue evaluada in vitro la actividad inhibitoria selectiva contra ecto-5'-nucleotidasa de 25 derivados arilados de la quinolina con buenos resultados que demuestran su potencial como agente anticancerígeno. Los derivados piridínicos alquinilados obtenidos mostraron excelentes propiedades ópticas con rendimientos cuánticos que llegaron hasta 55 % mientras que los 6-azaindoles alcanzaron un 44. Conclusiones: Las reacciones catalizadas por paladio, metátesis y cicloisomerización mediada por ácido, permitieron la síntesis de nuevos compuestos heterociclos funcionalizados derivados de la piridina y la quinolina con buenos rendimientos. Todos los compuestos fueron aislados, purificados y caracterizados estructuralmente y se determinó la actividad inhibitoria selectiva contra ecto-5'-nucleotidasa y las propiedades ópticas de los compuestos seleccionados con excelentes resultados.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[ABSTRACT  Introduction:  Nitrogenous heterocyclic compounds, specifically those derived from pyridine, are widely used in different branches of science, with special interest in the field of materials science and the pharmaceutical industry, where they have reached their maximum application due to their antimalarial properties. muscle relaxant, cardiac depressant and anticancer. The objectives of this work were to synthesize new pyridine and quinoline derivatives of interest in materials science and in the pharmaceutical industry through palladium-catalyzed reactions, metathesis and acid-mediated cycloisomerization, to isolate, purify and structurally characterize these compounds, as well as to evaluate the selective inhibitory activities against ecto-5'-nucleotidase and the optical properties of the selected promising compounds.  Methods:  They were established novel methodologies for the synthesis, using selective cross-coupling reactions of Suzuki, Sonogashira and Buchwald-Hartwig amination reactions, carbonyl-alkyne metathesis and acid-mediated cycloisomerization. These compounds were purified and characterized using chromatographic, spectroscopic, and spectrometric techniques. The optical properties were evaluated by ultraviolet-visible and fluorescence spectroscopy while the selective inhibitory activity against ecto-5'-nucleotidase was determined by capillary electrophoresis.  Results:  The results of this work allowed to obtain 231 new compounds with good yields. It was evaluated in vitro the selective inhibitory activity against ecto-5'-nucleotidase of 25 aryl derivatives of quinoline, with good results, demonstrating its potential as an anticancer agent. In addition, the alkynylated pyridines derivatives obtained showed excellent optical properties with quantum yields that reached 55 % while 6-azaindoles reached 44 %. Conclusions: The palladium-catalyzed reactions, metathesis and acid-mediated cycloisomerization used, allowed the synthesis of new functionalized heterocyclic compounds derived from pyridine and quinoline with good yields. They were isolated, purified and structurally characterized all the compounds and they were determined the selective inhibitory activity against ecto-5'-nucleotidase and the optical properties of the selected compounds with excellent results.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[Sonogashira]]></kwd>
<kwd lng="es"><![CDATA[Suzuki]]></kwd>
<kwd lng="es"><![CDATA[metátesis]]></kwd>
<kwd lng="es"><![CDATA[cicloisomerización]]></kwd>
<kwd lng="es"><![CDATA[heterociclo]]></kwd>
<kwd lng="en"><![CDATA[Sonogashira]]></kwd>
<kwd lng="en"><![CDATA[Suzuki]]></kwd>
<kwd lng="en"><![CDATA[metathesis]]></kwd>
<kwd lng="en"><![CDATA[cycloisomerization]]></kwd>
<kwd lng="en"><![CDATA[heterocycle]]></kwd>
</kwd-group>
</article-meta>
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