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.
Aqueous metal-free hydrothiolation of enamides and enecarbamates
作者:Eliezer Barman、Jason Hourizadeh、Daniel Lim
DOI:10.1016/j.tetlet.2019.150951
日期:2019.8
An efficient and metal-free, anti-Markovnikov selective, hydrothioaltion reaction of enamides and enecarbamates in an aqueous medium is presented. This protocol is operationally simple, mild, and atom-economical. This process provides access to thioethers from available thiols and a variety of enamides and enecarbamates. (C) 2019 Elsevier Ltd. All rights reserved.
Pummerer reaction methodology for the synthesis of 5-thiophenyl substituted oxazoles
作者:Jennifer D Kreisberg、Philip Magnus、Shirin Shinde
DOI:10.1016/s0040-4039(02)01704-5
日期:2002.10
Treatment of N-acylamino-2-thiophenyl derivatives with N-chlorosuccinimide (2.0 equiv.) followed by SnCl4 (0.1-1.0 equiv.) provides a direct synthesis of 5-thiophenyloxazoles. (C) 2002 Published by Elsevier Science Ltd.