121618-47-1Relevant articles and documents
Metal-free hydroalkoxylation of ynesulfonamides with esters
Gao, Erhui,Peng, Cheng,Zhang, Jingyi,Wang, Xiao-Na,Chang, Junbiao
supporting information, p. 2182 - 2185 (2021/03/26)
An efficient metal-free hydroalkoxylation reaction of ynesulfonamides with esters under mild conditions is described. Under the catalysis of TMSOTf, various ynesulfonamides are transformed into the corresponding alkoxy-substituted enamides in high yields
Efficient N-acylation of sulfonamides using cesium salt of Wells–Dawson heteropolyacid as catalyst: Synthesis of new N-acyl sulfonamides and cyclic imides
Benali, Nesma,Bougheloum, Chafika,Alioua, Sabrina,Belghiche, Robila,Messalhi, Abdelrani
supporting information, p. 3099 - 3112 (2018/12/04)
N-acylation of substituted sulfonamides with different anhydrides in the presence of Cesium salt of Wells–Dawson heteropolyacid (Cs5HP2W18O62) as an efficient and reusable catalyst was investigated for the first time. ?Cs5HP2W18O62 was used with a catalytic amount in water as a green solvent. At room temperature, a series of N-acylsulfonamides were synthesized, while under refluxing conditions, new cyclic imides containing sulfonyl group were obtained. Atom-economy, high yields, easy work-up, as well as simple catalyst recovery and reusability are the key features of this procedure.
Transition-metal-free tunable chemoselective nfunctionalization of indoles with ynamides
Hentz, Alexandre,Retailleau, Pascal,Gandon, Vincent,Cariou, Kevin,Dodd, Robert H.
supporting information, p. 8333 - 8337 (2014/08/18)
Two unprecedented Nfunctionalizations of indoles with ynamides are described. By varying the electron-withdrawing group on the ynamide nitrogen atom, either Z-indolo-etheneamides or indolo-amidines can be selectively obtained under the same metal-free reaction conditions. The scope and synthetic potential of these reactions, as well as some mechanistic insights provided by DFT calculations, are reported.
