Mild and efficient one-pot synthesis of chiral β-chalcogen amides via 2-oxazoline ring-opening reaction mediated by indium metal
作者:Antonio L. Braga、Fábio Z. Galetto、Paulo S. Taube、Márcio W. Paixão、Claudio C Silveira、Devender Singh、Fabrício Vargas
DOI:10.1016/j.jorganchem.2008.08.031
日期:2008.11
A simple and efficient procedure for the synthesis of β-seleno and β-thio amides via the ring-opening reaction of chiral 2-oxazolines in the presence of indium metal has been developed. Features of this method include the following: (i) easily and accessible starting materials; (ii) indium metal is more stable and less expensive then its respective salts; (iii) useful to excellent yields of β-chalcogen
One-pot modular synthesis of β-chalcogen amides via regioselective 2-oxazolines ring-opening reaction promoted by indium chalcogenolates under microwave irradiation
作者:Larissa F. Guimarães、Luana Bettanin、Roberth N. da Trindade、Cleiton da Silva、Andrielli Leitemberger、Marcelo Godoi、Fábio Z. Galetto
DOI:10.1016/j.tetlet.2020.152180
日期:2020.8
describe herein a microwave-assisted synthesis of β-chalcogen amides through the regioselective ring-opening reaction of 2-oxazolines promoted by bis(organoylchalcogeno)iodo indium(III) in situ generated. This protocol allows the preparation of structurally diverse β-chalcogen amides, with moderate to good yields, within a much shorter reaction time compared to conventional heating protocols.