Sulfamidation of 2-Arylaldehydes and Ketones with Chloramine-T
作者:Thomas Baumann、Michael Bächle、Stefan Bräse
DOI:10.1021/ol061410g
日期:2006.8.1
A series of aliphatic and aromatic carbonyl compounds has been transformed into the corresponding sulfamidated products by means of amine-catalyzed nitrene transfer of chloramine-T. Depending on the residues R, either alpha-sulfamidation in the case of aromatic aldehydes and acetone derivatives or direct sulfamidation at the carbonyl functionality of aliphatic aldehydes has been observed. Applying microwave conditions, good to excellent yields under significantly reduced reaction times could be obtained, thus providing a facile access to alpha, alpha-disubstituted amino acids.
Metal-Free Benzylic C−H Amination via Electrochemically Generated Benzylaminosulfonium Ions
作者:Ryutaro Hayashi、Akihiro Shimizu、Yetao Song、Yosuke Ashikari、Toshiki Nokami、Jun-ichi Yoshida
DOI:10.1002/chem.201604484
日期:2017.1.1
toluene derivatives in the presence of N‐tosyldiphenylsulfilimine gave the corresponding benzylaminosulfonium ions, which were treated with tetrabutylammonium iodide under non‐electrolytic conditions to give N‐tosylbenzylamines. The transformation serves as a metal‐ and chemical‐oxidant‐free method for benzylic C−H amination. Because of high oxidation potential of N‐tosyldiphenylsulfilimine the present