A Convenient and Benign Synthesis of Sulphonamides in PEG-400
作者:Pranab Jyoti Das、Bhaskar Sarmah
DOI:10.14233/ajchem.2015.16853
日期:——
A simple and convenient method is reported for the synthesis of a series of sulphonamides in PEG-400 using potassium carbonate as the base. The reaction is carried out in a heterogeneous medium and consequently product recovery is simple. The desired products with a variety of aromatic amines could be synthesized in a short reaction time in good yield. The PEG could be recovered for reuse.
The synthesis of a crystalline ethynyl-1,2-benziodoxol-3(1H)-one (EBX)–acetonitrile complex is described. EBX has been widely used as an active species for a variety of reactions; however, its high instability has so far prevented its isolation. The EBX–acetonitrile is self-assembled into a double-layered honeycomb structure through weak hypervalent iodine secondary interactions and hydrogen bonding
The synthesis of cis-β-amidevinyl benziodoxolones from the ethynyl benziodoxolone–chloroform complex and sulfonamides is reported. Evidence indicates that highly reactive unsubstituted ethynyl benziodoxolone undergoes Michael addition of sulfonamides, including sterically demanding acyclic aminoacidderivatives. The synthesis of selectively deuterated cis-β-amidevinyl benziodoxolones and investigation
Palladium-Catalyzed Intramolecular Oxidative Coupling Involving Double C(sp<sup>2</sup>)–H Bonds for the Synthesis of Annulated Biaryl Sultams
作者:Joydev K. Laha、Krupal P. Jethava、Neetu Dayal
DOI:10.1021/jo5011334
日期:2014.9.5
The palladium-catalyzed intramolecular oxidative coupling described herein involves a doubleC(sp2)–H bond functionalization in sulfonanilides, providing a workable access to biaryl sultams annulated into a six-membered ring that are otherwise difficult to obtain by literature methods. The other synthetic applications of this protocol including the synthesis of biaryl sultams containing a seven-membered