A general and practical sulfonylation of benzylic ammonium salts with sulfonyl hydrazides for the synthesis of sulfones
作者:Haibo Zhu、Yingying Zhang、Yishuai Liu、Liu Yang、Zongbo Xie、Guofang Jiang、Zhang-Gao Le
DOI:10.1016/j.tetlet.2020.151975
日期:2020.6
transition-metal-free cross-coupling of sulfonyl hydrazides with benzyl ammonium salts has been developed to synthesize benzyl sulfones using Cs2CO3 as base under mild conditions. The protocol employs stable and easy to handle coupling partners, and is endowed with good substrate compatibility, leading to functional benzyl sulfones in good yields.
已经开发出一种实用且有效的方法,该方法采用磺酰肼与苄基铵盐的无过渡金属交叉偶联,以Cs 2 CO 3为碱,在温和条件下合成苄基砜。该方案使用稳定且易于操作的偶联伙伴,并具有良好的底物相容性,从而可以高收率生产功能性苄砜。
Cobalt‐Catalyzed Redox‐Neutral Sulfonylative Coupling from (Hetero)aryl Boronic Acids, Ammonium Salts and Potassium Metabisulfite
作者:Yingying Zhang、Haibo Zhu、Qiangwen Fan、Liu Yang、Zongbo Xie、Zhang‐Gao Le
DOI:10.1002/cctc.202101716
日期:2022.2.8
redox-neutral sulfonylative coupling of boronic acids and ammonium salts to afford (hetero)aryl alkyl sulfones by using potassium metabisulfite has been realized. Various functional sulfones were obtained by using commercially available and air-stable CoCl2 in combination with phenanthroline ligand. In addition, various carbon based electrophiles, including diaryliodoniumsalts, heteroaryl halides, and
Nickel-Catalyzed Carboxylation of Benzylic C−N Bonds with CO<sub>2</sub>
作者:Toni Moragas、Morgane Gaydou、Ruben Martin
DOI:10.1002/anie.201600697
日期:2016.4.11
A user‐friendly Ni‐catalyzed reductive carboxylation of benzylic C−N bonds with CO2 is described. This procedure outperforms state‐of‐the‐art techniques for the carboxylation of benzyl electrophiles by avoiding commonly observed parasitic pathways, such as homodimerization or β‐hydride elimination, thus leading to new knowledge in cross‐electrophile reactions.
One-pot synthesis of sulfones via Ni(II)-catalyzed sulfonylation of boronic acids, Na2S2O5 and benzylic ammonium salts
作者:Haibo Zhu、Yishuai Liu、Yingying Zhang、Liu Yang、Jia Meng、Qian Li、Bozhen Gong、Zongbo Xie、Zhang-Gao Le
DOI:10.1016/j.mcat.2021.111500
日期:2021.4
from readily available boronic acids, sodium metabisulfite and benzylic ammonium salts as electrophiles is described. This general and efficient synthetic process is of broad scope, occurs in two steps, and delivers structural diverse sulfones, and the intermediate sulfinate is isolated. The transformation exhibits application of benzylic ammonium salts as novel electrophiles for direct insertion of