optimized reaction conditions are well suited to the task of N-vinylation of sulfoximine with trans-2-phenylvinylboronic acid. N-Arylation of sulfoximines with different arylboronic acids, including sterically hindered boronic acids, is achieved using copper(I) iodide and 4-DMAP at room temperature. Moreover, N-arylation of biologically relevant l-methionine sulfoximine is demonstrated for the first time
Nickel‐Catalyzed
<i>N</i>
‐Arylation of
<i>NH</i>
‐Sulfoximines with Aryl Halides via Paired Electrolysis
作者:Dong Liu、Zhao‐Ran Liu、Cong Ma、Ke‐Jin Jiao、Bing Sun、Lei Wei、Julien Lefranc、Simon Herbert、Tian‐Sheng Mei
DOI:10.1002/anie.202016310
日期:2021.4.19
A novel strategy for the N‐arylation of NH‐sulfoximines has been developed by merging nickel catalysis and electrochemistry (in an undivided cell), thereby providing a practical method for the construction of sulfoximine derivatives. Pairedelectrolysis is employed in this protocol, so a sacrificial anode is not required. Owing to the mild reaction conditions, excellent functional group tolerance and
Transfer of Electrophilic NH Using Convenient Sources of Ammonia: Direct Synthesis of NH Sulfoximines from Sulfoxides
作者:Marina Zenzola、Robert Doran、Leonardo Degennaro、Renzo Luisi、James A. Bull
DOI:10.1002/anie.201602320
日期:2016.6.13
valuable motifs for drug discovery. The protocol employs readily available sources of nitrogen without the requirement for either preactivation or for metal catalysts. Mixing ammonium salts with diacetoxyiodobenzene directly converts sulfoxides into sulfoximines. This report describes the first example of using of ammonia sources with diacetoxyiodobenzene to generate an electrophilic nitrogen center.
A copper-catalyzedoxidative decarboxylative coupling of α-keto acids with NH-sulfoximines has been developed. With CuBr as the catalyst and K2S2O8 as the oxidant, this reaction enables the formation of a C–N bond and gives N-aroylsulfoximine products in moderate to excellent yields. The reaction mechanism is likely to involve the generation of a reactive aroyl radical intermediate.
已经开发了铜催化的α-酮酸与NH-磺基亚砜的氧化脱羧偶联。以CuBr为催化剂,以K 2 S 2 O 8为氧化剂,该反应能够形成C–N键,并以中等至极好的收率得到N-芳酰基亚磺酰亚胺产品。反应机理可能涉及反应性芳酰基自由基中间体的产生。
Synthesis of NH‐Sulfoximines by Using Recyclable Hypervalent Iodine(III) Reagents under Aqueous Micellar Conditions
作者:Guocai Zhang、Hongsheng Tan、Weichun Chen、Hong C. Shen、Yue Lu、Changwu Zheng、Hongxi Xu
DOI:10.1002/cssc.201903430
日期:2020.3.9
The synthesis of NH-sulfoximines from sulfides has been first developed under mild conditions in an aqueous solution with surfactant TPGS-750-M as the catalyst at room temperature. In this newly developed process, a simple and convenient recycling strategy to regenerate the indispensable hypervalent iodine(III) is used. The resulting 1,2,3-trifluoro-5-iodobezene can be recovered almost quantitively