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Organocatalytic Enantioselective Conjugate Addition Reactions - A Powerful Tool for the Stereocontrolled Synthesis of Complex... Organocatalytic Enantioselective Conjugate Addition Reactions - A Powerful Tool for the Stereocontrolled Synthesis of Complex Molecules (Hardcover, Edition.)
Jose L. Vicario, Dolores Badia, Luisa Carrillo, Efraim Reyes
R4,284 Discovery Miles 42 840 Ships in 12 - 17 working days

This book, unique in its field, is a comprehensive description of all the methodologies reported for carrying out conjugate addition reactions in a stereoselective way, using small chiral organic molecules as catalysts (organocatalysts). In the last 3-4 years, this has been a rapidly growing field in organic chemistry, and many papers have appeared reporting excellent protocols for carrying out these highly efficient transformations that compete well with other classical approaches using transition metal catalysts. A particularly attractive feature of this transformation relies upon the fact that the conjugate addition (Michael and Hetero-Michael reactions) is an extraordinarily effective means to initiate cascade processes which result in the formation of complex molecules from very small and simple starting blocks. The book, written by noted experts, covers all recent advances in this hot topic, and provides a good state-of-the-art review for organic chemists working in this field and all those who wish to start projects in this area.

Actividad Antibacteriana de Plantas Medicinales (Spanish, Paperback): Mar?a Luisa Carrillo, Mayra Aguilar, Brenda Alvarado Actividad Antibacteriana de Plantas Medicinales (Spanish, Paperback)
Mar?a Luisa Carrillo, Mayra Aguilar, Brenda Alvarado
R793 Discovery Miles 7 930 Ships in 10 - 15 working days

Las plantas son para el ser humano, fuente de vida. Las usa para curar enfermedades por varias razones: por tradicion, facil adquisicion y bajo costo. Sin embargo, desde la perspectiva de la ciencia, esto no justifica el uso de plantas para la cura de enfermedades. Se requiere demostrar, con rigor cientifico, cada uno de los efectos curativos que se le atribuyen a cada una de ellas. Tales efectos pueden ser causados por una o varios compuestos presentes en la plantas. Para que este compuesto este disponible, influyen varios factores. Entre ellos la parte de la planta que se use y el metodo de extraccion que se haya empleado. Asi mismo, la forma de evaluar una actividad especifica puede repercutir en las conclusiones de un estudio. Entre los efectos curativos que se le atribuyen a las plantas se encuentra el efecto antibacteriano. En este libro se describen las caracteristicas de siete plantas usadas en la region mexicana de la Huasteca Potosina, como medicinales y se presentan los resultados obtenidos al evaluar su actividad antibacteriana."

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