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                <text>&lt;strong&gt;Preparation and mechanistic studies of 2-substituted Bisthiazolidines by imine exchange&lt;/strong&gt;</text>
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                <text>Bisthiazolidines (BTZ) are bicyclic compounds considered as penicillin analogs that inhibit the full range of Metallo‐&amp;beta;‐Lactamases (MBLs) and potentiate &amp;beta;‐lactam activity against resistant bacteria. Herein, we present a new methodology to prepare 2‐substituted bisthiazolidines by aldehyde exchange. Thirteen new bisthiazolidines were prepared using this methodology, with yields ranging from 31 to 75&amp;thinsp;%. The reaction is based on in situ imines formation, which are able to exchange side chains. The reaction intermediates were studied based on NMR experiments, and a key imine 1b‐II could be detected in the reaction mixture. Furthermore, a DFT computational analysis was performed to gain insights into the reaction mechanism, allowing us to unveil the different pathways and their activation barriers within the synthetic route. The results suggest that the most favorable route involve the formation of the thiazolidine 1b‐III by i) a N‐assisted N&amp;ndash;C bond cleavage, and ii) a thiol‐mediated 5 endo‐trig cyclization followed by a C&amp;ndash;N bond cleavage. In contrast with previously reported evidence, the imine metathesis was discarded as a plausible pathway. Finally, the reaction of 1b‐III with aldehyde 2a leads to bicycle 4a via the iminium ion 1b‐V.</text>
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                <text>European Journal of Organic Chemistry. no. 9, 2020. -- p. 1089-1092</text>
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                <text>&lt;strong&gt;Dise&amp;ntilde;o y s&amp;iacute;ntesis de heterociclos como posibles inhibidoresde Metalo-B-Lactamasas&lt;/strong&gt;</text>
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                <text>METALO-B-LACTAMASAS&lt;strong&gt;&lt;br /&gt;&lt;/strong&gt;</text>
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                <text>El descubrimiento de los antibi&amp;oacute;ticos dio lugar al comienzo de una nueva era en el tratamiento de enfermedades infecciosas, reduciendo la morbi-mortalidad de afecciones consideradas letales hasta la tercera d&amp;eacute;cada del siglo XX. En particular, el uso de los antibi&amp;oacute;ticos &amp;beta;-lact&amp;aacute;micos (A&amp;beta;L) ha sido uno de los acontecimientos m&amp;aacute;s revolucionarios en medicina que permiti&amp;oacute; el desarrollo de la profilaxis y el tratamiento de las infecciones bacterianas como se conoce hoy en d&amp;iacute;a. Los A&amp;beta;L se caracterizan por presentar en su estructura un anillo de &amp;beta;-lactama y un grupo &amp;aacute;cido carbox&amp;iacute;lico, perteneciendo a este grupo las penicilinas, cefalosporinas, carbapenemos y monobactamas, ver Figura 1 1. Figura 1. Ejemplo de antibi&amp;oacute;ticos-&amp;beta;-lact&amp;aacute;micos. El anillo &amp;beta;-lact&amp;aacute;mico se representa en azul. El mecanismo</text>
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                <text>&lt;strong&gt;Castillo, Valerie&lt;/strong&gt;</text>
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                <text>Proceeding of the National Academy Sciences of the United States of America v. 113, no. 26, 2016. -- p. E3745-3754</text>
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&lt;p&gt;(Por favor lea este aviso antes de abrir los documentos u objetos)&lt;/p&gt;&#13;
&lt;p&gt;&lt;strong&gt;La legislaci&amp;oacute;n uruguaya protege el derecho&lt;/strong&gt; de autor sobre toda creaci&amp;oacute;n literaria, cient&amp;iacute;fica o art&amp;iacute;stica, tanto en lo que tiene que ver con sus derechos morales, como en lo referente a los derechos patrimoniales con sujeci&amp;oacute;n a lo establecido por el derecho com&amp;uacute;n y las siguientes leyes (LEY 9.739 DE 17 DE DICIEMBRE DE 1937 SOBRE PROPIEDAD LITERARIA Y ARTISTICA CON LAS MODIFICACIONES INTRODUCIDAS POR LA LEY DE DERECHO DE AUTOR Y DERECHOS CONEXOS No. 17.616 DE 10 DE ENERO DE 2003, LEY 17.805 DE 26 DE AGOSTO DE 2004, LEY 18.046 DE 24 DE OCTUBRE DE 2006 LEY 18.046 DE 24 DE OCTUBRE DE 2006)&lt;/p&gt;&#13;
&lt;p&gt;&lt;strong&gt;ADVERTENCIA -&lt;/strong&gt; La consulta de este documento queda condicionada a la aceptaci&amp;oacute;n de las siguientes condiciones de uso: Este documento es &amp;uacute;nicamente para usos privados enmarcados en actividades de investigaci&amp;oacute;n y docencia. No se autoriza su reproducci&amp;oacute;n con fines de lucro. Esta reserva de derechos afecta tanto los datos del documento como a sus contenidos. En la utilizaci&amp;oacute;n o cita de partes debe indicarse el nombre de la persona autora.&lt;/p&gt;</text>
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                <text>&lt;strong&gt;Imine domino reactions generate novel scaffolds : Fused bisthiazolidines or bisthiiranes&lt;/strong&gt;</text>
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                <text>Novel domino processes that involve sequential reactions via iminium ions derived from b-amino thiols or b-amino alcohols were developed to form bisthiazolidines or bisthiiranes, respectively. The heterocycles were synthesized from readily available starting materials, forming four new chemical bonds in one process without the use of metals. The regioselectivity of the transformation could be explained on the basis of calculations of the coefficients of the frontier orbitals</text>
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                <text>&lt;p&gt;&lt;strong&gt;Informaci&amp;oacute;n sobre Derechos de Autor&lt;/strong&gt;&lt;/p&gt;&#13;
&lt;p&gt;(Por favor lea este aviso antes de abrir los documentos u objetos)&lt;/p&gt;&#13;
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&lt;p&gt;&lt;strong&gt;ADVERTENCIA&lt;/strong&gt; - La consulta de este documento queda condicionada a la aceptaci&amp;oacute;n de las siguientes condiciones de uso: Este documento es &amp;uacute;nicamente para usos privados enmarcados en actividades de investigaci&amp;oacute;n y docencia. No se autoriza su reproducci&amp;oacute;n con fines de lucro. Esta reserva de derechos afecta tanto los datos del documento como a sus contenidos. En la utilizaci&amp;oacute;n o cita de partes debe indicarse el nombre de la persona autora.&lt;/p&gt;</text>
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