Godino Ojer, MarinaMatos, InesBernardo, M.Carvalho, R.G.P. Soares, Olívia SaloméDurán Valle, C.Fonseca, I.M.Pérez Mayoral, María Elena2025-01-092025-01-092020-11-01M. Godino-Ojer, I. Matos, M. Bernardo, R. Carvalho, Olívia Salomé G.P. Soares, C. Durán-Valle, I.M. Fonseca, E. Pérez Mayoral, Acidic porous carbons involved in the green and selective synthesis of benzodiazepines, Catalysis Today, Volume 357, 2020, Pages 64-73, ISSN 0920-5861, https://doi.org/10.1016/j.cattod.2019.11.027.0920-5861https://doi.org/10.1016/j.cattod.2019.11.027.https://hdl.handle.net/20.500.14468/25145Esta es la versión aceptada del artículo. La versión registrada fue publicada por primera vez en Catalysis Today, Volume 357, 2020, Pages 64-73, ISSN 0920-5861, está disponible en línea en el sitio web del editor: https://doi.org/10.1016/j.cattod.2019.11.027. This is the accepted version of the article. The recorded version was first published in Catalysis Today, Volume 357, 2020, Pages 64-73, ISSN 0920-5861, is available online on the publisher's website: https://doi.org/10.1016/j.cattod.2019.11.027.Eco-sustainable and recyclable porous carbons are reported as metal-free catalysts for the synthesis of benzodiazepines for the first time. The porous carbons were able to efficiently catalyse the synthesis of benzodiazepine 1 from o-phenylendiamine 2 and acetone 3 under mild conditions. Both acidic functions and the porosity of the catalysts were determinant features. High conversion values were obtained when using HNO3 oxidized carbons. The highest selectivity to benzodiazepine 1 was obtained in the presence of the most microporous catalyst N-N, which is indicative of the great influence of porous properties. Stronger acid sites and high microporosity of the carbon treated with H2SO4 yield benzodiazepine 1 with total selectivity.eninfo:eu-repo/semantics/openAccess23 Química::2303 Química inorgánicaartículoActivated carbonsheterogeneous catalytic systemsheterocyclic chemistrybenzodiazepines