Three-component synthesis of N-sulfonylformamidines in the presence of magnetic cellulose supported N-heterocyclic carbene-copper complex, as an efficient heterogeneous nanocatalyst
作者:Salman Shojaei、Zarrin Ghasemi、Aziz Shahrisa
DOI:10.1016/j.tetlet.2017.08.075
日期:2017.10
A cellulose based magnetic nanocomposite possessing NHC-Cu Complex has been synthesized and characterized. It was then applied as a highly active catalyst in one-pot three-component reaction of sulfonyl azides, secondary amines and triethylamine to afford N-sulfonylformamidines. Copper catalyzed oxidative transformation of C-N bond of triethylamine is a key step to give desired products. In contrast
Electrochemically generated <i>N</i>-iodoaminium species as key intermediates for selective methyl sulphonylimination of tertiary amines
作者:Binbin Huang、Chao Yang、Jia Zhou、Wujiong Xia
DOI:10.1039/c9cc09869k
日期:——
This study presents a straightforward protocol for approaching N-sulphonylamidines via an electricity-driven, iodine-mediated cross dehydrogenative condensation (CDC) between sulphonamides and tertiary amines.
Rapid and efficient synthesis of formamidines in a catalyst-free and solvent-free system
作者:Zitong Zhou、Yu Zhao、Donghua Zhou、Li Li、Hui Luo、Liao Cui、Weiguang Yang
DOI:10.1039/d1ra06809a
日期:——
An operationally rapid and efficientsynthesis of N-sulfonyl formamidines that proceeds under mild conditions was achieved by reaction of a mixture of an amine, a sulfonyl azide, and a terminal ynone under catalyst-free and solvent-free conditions. Terminal ynones provide the C source to formamidines via complete cleavage of CC.
通过胺、磺酰叠氮化物和末端炔酮的混合物在无催化剂和无溶剂条件下反应,实现了在温和条件下进行的N-磺酰基甲脒的可操作快速且有效的合成。末端 ynones通过完全裂解 C C为甲脒提供 C 源。
Catalyst-free one-pot, four-component approach for the synthesis of di- and tri-substituted<i>N</i>-sulfonyl formamidines
A straightforward one-pot, multicomponent approach was developed to synthesize di- and tri-substituted N-sulfonyl formamidines from sulfonyl chlorides, NaN3, ethyl propiolate, and primary/secondary amines under mild conditions without catalysts or additives. Structural analysis of the di-substituted sulfonyl formamidines indicated formation of the E-syn/anti isomeric form. Tri-substituted analogues
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.