Science and Technology Production
Article
Authorship
MUÑOZ, MERCEDES
;
Pasquale, Gustavo
;
SATHICQ, ANGEL GABRIEL
;
ROMANELLI, GUSTAVO PABLO
;
Cabello, Carmen Ines
;
Gazzoli, Delia
Date
2019
Publishing House and Editing Place
De Gruyter
Magazine
Green Processing and Synthesis,
vol. 8
(pp. 600-610)
De Gruyter
Summary
Information provided by the agent in
SIGEVA
The volcanic ash from the Andes mountain range (Puyehue-Cordon Caulle volcanic complex situated in western South America on the Argentinean-Chilean border) was used as heterogeneous acid catalyst in the suitable synthesis of 3H-1,5-benzodiazepines. The natural ashes were classified according to their particle size to generate the different catalytic materials. The catalysts were characterized by powder X-ray diffraction (XRD), scanning electron microscopy (SEM) with energy dispersive spectrosco...
The volcanic ash from the Andes mountain range (Puyehue-Cordon Caulle volcanic complex situated in western South America on the Argentinean-Chilean border) was used as heterogeneous acid catalyst in the suitable synthesis of 3H-1,5-benzodiazepines. The natural ashes were classified according to their particle size to generate the different catalytic materials. The catalysts were characterized by powder X-ray diffraction (XRD), scanning electron microscopy (SEM) with energy dispersive spectroscopy (EDS), vibrational spectroscopies (FT-IR and Raman), and textural properties were determined by N2 adsorption (SBET). Potentiometric titration with n-butylamine was used to determine the acidic properties of the catalytic materials. Several 3H-1,5-benzodiazepines were obtained by reaction of o-phenylenediamine and substituted 1,3-diphenyl-1,3-propanedione in solvent-free conditions, giving good to excellent yields of a variety benzodiazepines. The method was carried out in environmentally friendly conditions and it was operationally simple. The volcanic ash resulted in a safe and recyclable catalyst.
Show more
Show less
Key Words
BENZODIAZEPINESVOLCANIC ASHSOLVENT-FREE REACTIONHETEROGENEOUS CATALYSISGREEN CHEMISTRY
Download or request the full text