Interception of amide ylides with sulfonamides: synthesis of (<i>E</i>)-<i>N</i>-sulfonyl amidines catalyzed by Zn(OTf)<sub>2</sub>
作者:Jijun Chen、Wenhao Long、Shangwen Fang、Yonggang Yang、Xiaobing Wan
DOI:10.1039/c7cc07364j
日期:——
Through the interception of amide ylides with sulfonamides, we herein report the first general example of an intermolecular condensation reaction between sulfonamides and amides. Beyond formamides, this approach was successfully applied to a variety of lactams and linear amides, giving rise to a broad array of (E)-N-sulfonyl amidines.
A highly general, experimentally simple, and inexpensive catalyst system was developed for the amidation of aryl iodides by using 5 mol% of CuI as catalyst, 20 mol% of an amino acid as ligand, and K3PO4 as base. (C) 2004 Elsevier Ltd. All rights reserved.
Direct Use of Copper-Containing Minerals in Goldberg Arylation of Amides