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
N-methylation of sulfoximines using methylboronic acid is reported. The reactions provide excellent yields in a short span of time under mild conditions. The optimized conditions were also found to be suitable for the N-alkylation of sulfoximine with different alkylboronic acids. In addition, N-methylation and cyclopropylation of the bioactive L-methionine sulfoximine derivative was demonstrated under standard
Rhodium-catalyzed direct synthesis of unprotected NH-sulfoximines from sulfoxides
作者:Jinmin Miao、Nigel G. J. Richards、Haibo Ge
DOI:10.1039/c4cc04349a
日期:——
A novel rhodium-catalyzed imination of sulfoxides using O-(2,4-dinitrophenyl)hydroxylamine is developed under mild conditions with good functional group tolerance. This method provides an efficient access to free NH-sulfoximines, an important structural unit in a variety of biologically active compounds.
Copper catalyzed N-arylation of sulfoximines with aryldiazonium salts in the presence of DABCO under mild conditions
作者:Siddharth Baranwal、Jeyakumar Kandasamy
DOI:10.1016/j.tetlet.2020.152079
日期:2020.7
tetrafluoroborates is demonstrated in the presence of copper chloride and DABCO. A wide range of aryl and alkyl sufoximines are participated in the couplingreaction with different aryldiazonim salts bearing electron donating and withdrawinggroups and provided the desired products in 67–88% yields. The reaction proceeds through a radical mechanism.
PIDA/I<sub>2</sub>-mediated photo-induced aerobic <i>N</i>-acylation of sulfoximines with methylarenes
作者:Nikita Chakraborty、Kamal K. Rajbongshi、Amisha Gondaliya、Bhisma K. Patel
DOI:10.1039/d4ob00175c
日期:——
A visible-light-promoted, PIDA/I2-mediated acylation of NH-sulfoximines with methylarenes as an acyl source has been achieved. This transition metal and photosensitizer-free approach provides easy access to N-acylsulfoximines via oxidative coupling of sulfoximines with easily available methylarenes without using any peroxide source. Mechanistic investigations suggest the intermediacy of radicals and