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
A direct and convenient metal-free method to prepare sulfonyl amidines in the presence of aqueous tert-butyl hydroperoxide (T-HYDRO) has been developed. Different tertiary and secondary amines were tested for compatibility with the oxidative conditions and could be coupled with sulfonyl azides to form the corresponding amidines in moderate to good yields.
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.
A new bromoform reaction of tertiary amines with N,N-dibromosulfonamides or NBS/sulfonamides has been developed. A series of amidines were prepared with moderate to good yields via a Csp(3)-Csp(3) bond cleavage.
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。