Vinyl-1,2,4-oxadiazoles Behave as Nucleophilic Partners in Morita–Baylis–Hillman Reactions
作者:Fábio S. Fernandes、Manoel T. Rodrigues、Lucas A. Zeoly、Caroline Conti、Célio F. F. Angolini、Marcos Nogueira Eberlin、Fernando Coelho
DOI:10.1021/acs.joc.8b02402
日期:2018.12.21
function as a new and efficient nucleophilic partner for the Morita–Baylis–Hillman (MBH) reaction. The reaction between 5-vinyl-3-aryl-1,2,4-oxadiazoles and aromatic and aliphatic aldehydes, catalyzed by DABCO in the absence of solvent, showed high efficiency to afford a new class of heterocyclic MBH adducts with potential biological activity on yields up to 99% and short reaction times. These synthetically
Aza-Morita–Baylis–Hillman Reaction with Vinyl-oxadiazoles: An Expeditious Approach to Access New Heterocyclic Arrangements
作者:André Capretz-Agy、Fábio S. Fernandes、Manoel T. Rodrigues、Caroline Conti、Fernando Coelho
DOI:10.1055/s-0039-1691497
日期:2020.4
In this communication, we disclosed a new aza-MBH reaction in which traditional nucleophilic partners of these reactions (e.g., acrylates, nitroolefins or enones) were replaced by vinyl-1,2,4-oxadiazoles. Thus, the aza-MBH reaction between 5-aryl-3-vinyl-1,2,4-oxadiazoles and N-sulfonylimines, catalyzed by the mixture DABCO/AcOH, provides a class of newadduct in yields varying from 31% up to 93% in