A new and environmentally benign synthesis of aroylguanidines using iron trichloride
作者:Simon Pape、Pablo Wessig、Heiko Brunner
DOI:10.1039/c5ra20869f
日期:——
A new synthetic approach for the guanylation of aroylthioureas using iron trichloride is presented. Our synthetic method distinguishes itself by benign reaction conditions, low costs and a broad product spectrum. The scope of the reaction and calorimetric studies are described.
Iron Trichloride and Air Mediated Guanylation of Acylthioureas. An Ecological Route to Acylguanidines: Scope and Mechanistic Insights
作者:Simon Pape、Pablo Wessig、Heiko Brunner
DOI:10.1021/acs.joc.6b00600
日期:2016.6.3
Recently we introduced iron trichloride as an environmentally benign and cost-efficient reagent for the synthesis of N-benzoylguanidines. This highly attractive synthetic approach grants access to a broad spectrum of N-benzoylguanidines under mild conditions in short reaction times. In this work we present an extended scope of Our methodology along with the results obtained from mechanistic studies via in situ IR spectroscopy in combination with LC (liquid chromatography)-MS analyses. On the basis of these new mechanistic insights we were able to optimize the synthetic protocol and to develop an alternative mechanistic proposal. In this context the symbiotic roles of iron trithloride and oxygen in the guanylation process are highlighted.
Exploring the antileishmanial activity of <i>N</i><sup>1</sup>,<i>N</i><sup>2</sup>-disubstituted-benzoylguanidines: synthesis and molecular modeling studies
作者:Kaio Maciel de Santiago-Silva、Bruna Taciane da Silva Bortoleti、Tiago de Oliveira Brito、Ivete Conchon Costa、Camilo Henrique da Silva Lima、Fernando Macedo、Milena Menegazzo Miranda-Sapla、Wander Rogério Pavanelli、Marcelle de Lima Ferreira Bispo
DOI:10.1080/07391102.2021.1959403
日期:2022.12.12
A simple one-pot methodology for the synthesis of substituted benzoylguanidines from benzoylthioureas using tert-butyl hydroperoxide
作者:Henrique Esteves、Ângelo de Fátima、Rosane de P. Castro、José R. Sabino、Fernando Macedo、Tiago Oliveira Brito
DOI:10.1016/j.tetlet.2015.10.088
日期:2015.12
The potential of tert-butyl hydroperoxide as a reagent in the guanylation of benzoylthioureas in the presence of amines has been evaluated in a systematic study involving substrates bearing N-2-substituents with different electronic properties. The results show that (BuOOH)-Bu-t is a suitable and robust reagent for the synthesis of either N-1,N-2,N-3-tri- and tetrasubstituted or N-1,N-2-disubstituted guanidines from N-2-substituted N-1-benzoylthioureas and N-1-benzoylthioureas, respectively. The recrystallised guanylation adducts were readily obtained in good yields and at high purity levels after a simple one-pot reaction procedure. The crystal structures of two novel benzoylguanidines are provided. (C) 2015 Elsevier Ltd. All rights reserved.