A bifunctional strategy for N-heterocyclic carbene-stabilized iridium complex-catalyzed <i>N</i>-alkylation of amines with alcohols in aqueous media
作者:Ming Huang、Yinwu Li、Jiahao Liu、Xiao-Bing Lan、Yan Liu、Cunyuan Zhao、Zhuofeng Ke
DOI:10.1039/c8gc02298d
日期:——
2-hydroxypyridine and a thermally stable N-heterocyclic carbene ligand, an Ir-catalyzed N-monoalkylation reaction has been developed in aqueous media under base-free conditions. This reaction proceeds smoothly with high yields of various aromatic amines and sulfonamides with a wide range of primary alcohols. Experimental and computational studies revealed a metal–ligand cooperative mechanism and its thermal stability
Diiodine–Triethylsilane System: Reduction of N-Sulfonyl Aldimines to N-Alkylsulfonamides
作者:Jin Jiang、Lili Xiao、Yu-Long Li
DOI:10.1055/s-0040-1706544
日期:2021.2
using these reagents are easy to operate and require mild reaction conditions. Molecular iodine and a hydrosilane were used to reduce N-sulfonyl aldimines to the corresponding N-alkylsulfonamides. This transformation is a practicalmethod for the synthesis of N-alkylsulfonamides.
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
Copper-Catalyzed Silylation of C(sp<sup>3</sup>)–H Bonds Adjacent to Amide Nitrogen Atoms
作者:Jian-Jun Feng、Martin Oestreich
DOI:10.1021/acs.orglett.8b01698
日期:2018.7.20
copper-catalyzed C–Si bond formation between N-halogenated amides and Si–B reagents is described. This oxidative coupling enables the silylation of C(sp3)–H bonds α to an amide nitrogen atom. The utility of the new method is demonstrated for sulfonamides, and N-chlorination with tBuOCl and C–H silylation employing CuSCN/4,4′-dimethoxy-2,2′-bipyridine as catalyst can be performed without purification of the