Manganese-Catalyzed <i>N</i>-Alkylation of Sulfonamides Using Alcohols
作者:Benjamin G. Reed-Berendt、Louis C. Morrill
DOI:10.1021/acs.joc.9b00203
日期:2019.3.15
An efficient manganese-catalyzed N-alkylation of sulfonamides has been developed. This borrowing hydrogen approach employs a well-defined and bench-stable Mn(I) PNP pincer precatalyst, allowing benzylic and simple primary aliphatic alcohols to be employed as alkylating agents. A diverse range of aryl and alkyl sulfonamides undergoes mono-N-alkylation in excellent isolated yields (32 examples, 85% average
A highly efficient catalyst-free protocol for C–H bond activation: sulfamidation of alkyl aromatics and aldehydes
作者:Arun Jyoti Borah、Prodeep Phukan
DOI:10.1039/c2cc31258a
日期:——
A catalyst-free protocol has been developed for amidation of alkyl aromatics and aldehydes using TsNBr(2)via a nitrene transfer process in the presence of a base in excellent yield within a short time. The reaction was found to be selective for secondary and tertiary benzylic C-H bonds and C-H bonds of aldehydic groups.
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