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Trends in Heterocyclic Chemistry   Volumes    Volume 9 
Preparative heterocyclic chemistry using Tonsil a bentonitic clay; 1981 to 2003
Armando Cabrera Ortiz, Cecilio Alvarez Toledano, Francisco Delgado Reyes, Gabriel A. Arroyo Razo, Guillermo Penieres Carrillo, Manuel Salmon Salazar, Rene Miranda Ruvalcaba
Pages: 195 - 235
Number of pages: 41
Trends in Heterocyclic Chemistry
Volume 9 

Copyright © 2003 Research Trends. All rights reserved


Tonsil, a bentonitic clay, has long been employed as a Brönsted & Löwry and Lewis acid catalyst, reagent and/or support of various inorganic reagents. In this sense, this review deals with a detailed characterization of the clay, in addition to his major uses covering de complete information from 1981 through 2003, which was the result of considerable proliferation of papers from our and other laboratories.

Thus, in order to understand the behavior of the clay, several structural and surface properties determinate by means of various analytical techniques are discussed: 29Si and 27AL MAS-NMR; X-ray diffraction; Scanning electron microscopy (SEM); IR-Spectrophotometry; thermal analysis (DTA and TGA); as well as a N2 adsorption technique (BET)

Moreover, and as it can be seen, the aim of the review is to highlight the use of Tonsil in the area of heterocyclic molecules; this in complement with some other interesting features.

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