been performed with several chiral peroxy-acids and under the same reaction conditions. The differences in the diastereoselectivity and in the enantioselectivity of the two reactions are discussed in terms of the influence of the sulphonyl and alkyl substituents at nitrogen on the stereochemicalfeatures of the peroxy-acid–iminereaction.
Reversed-Polarity Synthesis of <i>N</i>-Sulfonyl Ketimines with Imidoylsilanes and Diaryliodonium Salts via Palladium-Catalyzed Reactions
作者:Seungmi Lee、Inji Shin
DOI:10.1021/acs.joc.2c00116
日期:2022.5.20
Iminines, aldimines and ketimines, have been traditionally synthesized by the condensation reaction of the corresponding carbonyl compound with an amine moiety. More recently, palladium-catalyzed synthesis of ketimines using imidoyl chlorides has been reported. As an alternative, we report the reversed-polarity synthesis of N-sulfonyl ketimines using an anion equivalent imidoylsilane as a new nucleophilic
Photochemical and Atom-Economical Sulfonylimination of Alkenes with Bifunctional <i>N</i>-Sulfonyl Ketimine
作者:Lei Wang、Yang Yu、Li Deng、Kang Du
DOI:10.1021/acs.orglett.3c00724
日期:——
tolerance, provides a direct and atom-economic approach for the synthesis of valuable β-amino sulfone derivatives as a single regioisomer. In addition to terminal alkenes, internal alkenes participate in this reaction with high diastereoselectivity. N-Sulfonyl ketimines with aryl or alkyl substituents were found to be compatible with this reaction condition. This method could be applied in the late-stage
amino-sulfonylation of alkenes with high regioselectivity and diastereoselectivity. This approach showed high functional group tolerance and compatibility, facilitating the late-stagemodification of some bioactive alkenes and sulfonamidemolecules, thereby expanding the biologically relevant chemical space. Mechanistic investigations suggest that an energy transfer (EnT) process was in operation.
Photocatalytic Sulfonyl Peroxidation of Alkenes via Deamination of <i>N</i>-Sulfonyl Ketimines
作者:Yuting Feng、Shujun Chen、Leiyang Lv、Ivan A. Yaremenko、Alexander O. Terent’ev、Zhiping Li
DOI:10.1021/acs.orglett.4c00241
日期:2024.3.8
A photocatalytic three-component sulfonyl peroxidation of alkenes with N-sulfonyl ketimines and tert-butyl hydroperoxide is reported. The reaction takes place via the photoinduced EnT process, which allows the efficient synthesis of a variety of β-peroxyl sulfones under mild reaction conditions in the absence of a transitionmetal catalyst. The downstream derivatizations of the peroxides were also