在本函中,我们报道了使用N-芳基腐胺作为合成中间体,用于制备N-酰基-N'-芳基四亚甲基二胺3和相关的七元杂环am 4。通过Cs 2 CO 3 / KI介导的4-氯丁腈的氨解并随后还原来合成化合物1。二胺1与羧酸酐的N-酰化选择性地导致N-酰基-N'-芳基四亚甲基二胺3。由PPE促进的此类前体的微波辅助闭环反应允许合成迄今未报道的1-芳基-2-烷基-1 H -1,4,5,6-四氢-1,3-二氮杂4。
在本函中,我们报道了使用N-芳基腐胺作为合成中间体,用于制备N-酰基-N'-芳基四亚甲基二胺3和相关的七元杂环am 4。通过Cs 2 CO 3 / KI介导的4-氯丁腈的氨解并随后还原来合成化合物1。二胺1与羧酸酐的N-酰化选择性地导致N-酰基-N'-芳基四亚甲基二胺3。由PPE促进的此类前体的微波辅助闭环反应允许合成迄今未报道的1-芳基-2-烷基-1 H -1,4,5,6-四氢-1,3-二氮杂4。
Microwave-assisted cyclizations promoted by polyphosphoric acid esters: a general method for 1-aryl-2-iminoazacycloalkanes
作者:Jimena E Díaz、María C Mollo、Liliana R Orelli
DOI:10.3762/bjoc.12.190
日期:——
omega-arylaminonitriles promoted by polyphosphoricacid (PPA) esters. 1-Aryl-2-iminopyrrolidines were easily prepared from the acyclic precursors employing a chloroformic solution of ethyl polyphosphate (PPE). The use of trimethylsilyl polyphosphate (PPSE) in solvent-free conditions allowed for the synthesis of 1-aryl-2-iminopiperidines and hitherto unreported 1-aryl-2-iminoazepanes. The cyclization reaction involves
The efficient copper-catalyzed cyanoalkylation of amines via C–Cbondcleavage has been demonstrated. Distinctive features of this procedure involves mild conditions, broad range of nitrogen nucleophiles, high selectivity, and good functional group tolerance, thus providing a useful approach for the C(sp3)–N bond formations. Most importantly, this protocol is applicable to the late-stage functionalization
An Efficient Synthesis of <i>N</i>-Arylputrescines and Cadaverines
作者:Liliana Orelli、Natalia Link、Jimena Díaz
DOI:10.1055/s-0028-1087817
日期:——
We present a two-step, general synthesis of N-arylputrescines and cadaverines, by cesium carbonate mediated alkylation of anilines with Ï-chloronitriles and subsequent reduction. The cesium-mediated alkylation shows remarkable selectivity towards the monoalkylation product. The method is straightforward and leads to satisfactory global yields.
Single-Electron-Transfer-Induced C(sp<sup>3</sup>)–N Couplings via C–C Bond Cleavage of Cycloketoxime Esters
作者:Binlin Zhao、Minyan Wang、Zhuangzhi Shi
DOI:10.1021/acs.joc.9b01338
日期:2019.8.16
A practical single-electron-transfer-induced selective C(sp(3))-N coupling of cycloketoximes with anilines via C-C bond cleavage under copper-catalytic and synergetic photoredox/copper-catalytic reaction systems has been uncovered. These two powerful and simple protocols demonstrated excellent selectivity and good functional group compatibility without any base or ligand control. Preliminary mechanistic experiments indicated that a radical-mediated process was involved in these transformations.
An Efficient Synthesis of<i>N</i>-Alkyl-<i>N</i>-arylputrescines and Cadaverines
作者:María C. Mollo、Nadia Gruber、Jimena E. Díaz、Juan Á. Bisceglia、Liliana R. Orelli