Exploiting Anion–π Interactions for Efficient and Selective Catalysis with Chiral Molecular Cages
作者:Na Luo、Yu‐Fei Ao、De‐Xian Wang、Qi‐Qiang Wang
DOI:10.1002/anie.202106509
日期:2021.9.13
direction to develop new and fundamental catalysis. For the appealing yet flexible π-face activation, can two or more π-acidic surfaces be manipulated for cooperative activation to achieve efficient transformation and particularly selectivity control is highly desirable. Here, we demonstrate a supramolecular π-catalysis strategy by establishing cooperative π-face activation in a confined electron-deficient
Lewis Base‐Brønsted Acid Co‐catalyzed Morita‐Baylis‐Hillman Reaction of Cyclic Sulfamidate Imines
作者:Gaukhar Khassenova、Olga García Mancheño
DOI:10.1002/ejoc.202100345
日期:2021.5.20
A Morita-Baylis-Hillman reaction of sulfamidate imines with a series of Michael acceptors for the efficientsynthesis of cyclic sulfamidates, bearing α,β-unsaturated chains was developed using DABCO/acetic acid as co-catalytic system. This simple approach showed a high functional group tolerance and robustness, allowing for easy upscaling and further functionalization towards densely decorated sulfamidates
oxidative C–H/N–H cross-coupling amination of cyclic sulfamidate imines under undivided electrolytic conditions via an atom- and step-economic method. In this transformation, a wide variety of cyclic or acyclic dialkyl amines, amino acid derivatives, and more challenging primary anilines acted as suitable substrates with good reaction outcomes. The synthetic advantage of this electrochemical method
External photocatalyst-free C-H alkylation of N-sulfonyl ketimines with alkanes under visible light
作者:Hai-Yang Song、Fang Xiao、Jun Jiang、Chao Wu、Hong-Tao Ji、Yu-Han Lu、Ke-Li Wang、Wei-Min He
DOI:10.1016/j.cclet.2023.108509
日期:2023.9
A simple, practical and eco-friendly visible light-induced alkylation of N-sulfonyl ketamine under metal-, additive-, external photocatalyst-free conditions was developed. This photocatalytic method utilized low cost and abundant alkanes as the atom economy alkyl sources with H2O2 as the environmentally beneficial oxidant, allowing for the efficient construction of diverse valuable 4-alkylated sulfonyl
开发了一种简单、实用且环保的可见光诱导N-磺酰氯胺酮在无金属、添加剂、无外部光催化剂条件下的烷基化反应。该光催化方法利用低成本、丰富的烷烃作为原子经济烷基源,以H 2 O 2作为环境有益的氧化剂,可以有效构建多种有价值的4-烷基化磺酰基氯胺酮。N-磺酰氯胺起到反应物和光催化剂的双重作用,从而简化了反应体系。
EtOH-catalyzed electrosynthesis of imidazolidine-fused sulfamidates from<i>N</i>-sulfonyl ketimines,<i>N</i>-arylglycines and formaldehyde
作者:Yu-Han Lu、Si-Yu Mu、Hong-Xia Li、Jun Jiang、Chao Wu、Min-Hang Zhou、Wen-Tao Ouyang、Wei-Min He
DOI:10.1039/d2gc04906f
日期:——
With formaldehyde as an atom-economical carbonyl synthon, the EtOH-catalyzed electrochemical multicomponent synthesis of various imidazolidine-fused sulfamidates was developed. A wide range of products were obtained in good to excellent yields under organic oxidant-free, energy-saving and mild conditions. The mechanistic study revealed that the in situ generated ethoxide played a crucial role in producing