[EN] PROCESS FOR THE PREPARATION OF HETEROARYL-SUBSTITUTED SULFUR(VI) COMPOUNDS [FR] PROCÉDÉ DE PRÉPARATION DE COMPOSÉS DU SOUFRE (VI) SUBSTITUÉS PAR UN HÉTÉROARYLE
Copper-catalyzed preparation of <i>N</i>-aroylated sulfoximines from methylarenes
作者:Anguo Hou、Zijian Zhao
DOI:10.1080/00397911.2017.1318444
日期:2017.7.3
ABSTRACT A copper-catalyzed methodology for the preparations of N-aroylated sulfoximines from methylarenes was herein demonstrated. The transformation proceeded with the assistance of external oxidant tert-butyl hydroperoxide, requiring for no additional solvents or ligands. The good compatibility and high efficiency of the newly developed protocol were well described by 21 examples and up to 91% yields
Sulfoximines: A Reusable Directing Group for Chemo- and Regioselective ortho CH Oxidation of Arenes
作者:M. Ramu Yadav、Raja K. Rit、Akhila K. Sahoo
DOI:10.1002/chem.201200092
日期:2012.4.27
Sulfoximinesdirect: A new protocol for the chemo‐ and regioselectiveorthoCH acetoxylation of arenes in N‐benzoylated sulfoximines is reported. The sulfoximinedirectinggroup is easily detached from the CHoxidation product through acid‐promoted hydrolysis, isolated, and reused (see scheme). The meta‐substituted phenols are synthesized following this strategy and the stereointegrity of the sulfoximine
Transition metal-free aroylation of NH-sulfoximines with methyl arenes
作者:Ya Zou、Jing Xiao、Zhihong Peng、Wanrong Dong、Delie An
DOI:10.1039/c5cc05483d
日期:——
An iodine-catalyzed N-aroylation of NH-sulfoximines with methyl arenes was herein demonstrated without participation of external organic solvents, transition metal-catalysts or ligands.
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。
Microwave-Accelerated N-Acylation of Sulfoximines with Aldehydes under Catalyst-Free Conditions
作者:Kamal K. Rajbongshi、Srinivas Ambala、Thavendran Govender、Hendrik G. Kruger、Per I. Arvidsson、Tricia Naicker
DOI:10.1055/s-0039-1691589
日期:2020.4
An efficient catalyst-free radical cross-coupling reaction between aromatic aldehydes and sulfoximines was developed. The reaction took place in the presence of N-bromosuccinimide as the radical initiator under microwave irradiation to afford the corresponding acylated sulfoximines in moderate to excellent yields (27 examples). This protocol proved to be rapid, easy to handle, and applicable to a broad