Tungsten-Catalyzed Transamidation of Tertiary Alkyl Amides
作者:Fang-Fang Feng、Xuan-Yu Liu、Chi Wai Cheung、Jun-An Ma
DOI:10.1021/acscatal.1c01840
日期:2021.6.18
chloride as a catalyst and chlorotrimethylsilane as an additive. The highly electrophilic and oxophilic tungsten catalyst enables the selective scission of a C–N bond of tertiary alkyl amides to effect transamidation of a myriad of structurally and electronically diverse tertiary alkyl amides and amines. Mechanistic study implies that the synergistic effect of the catalyst and the additive could pronouncedly
Deoxyfluorination of Carboxylic Acids with CpFluor: Access to Acyl Fluorides and Amides
作者:Xiu Wang、Fei Wang、Fengfeng Huang、Chuanfa Ni、Jinbo Hu
DOI:10.1021/acs.orglett.1c00190
日期:2021.3.5
deoxyfluorination of carboxylic acids to afford various acyl fluorides. This all-carbon-based fluorination reagent enabled the efficient transformation of (hetero)aryl, alkyl, alkenyl, and alkynyl carboxylic acids to the corresponding acyl fluorides under the neutral conditions. This deoxyfluorination method was featured by the synthesis of acyl fluorides with in-situ formed CpFluor, as well as the one-pot
Microwave-assisted preparation of amides using a stable and reusable mesoporous carbonaceous solid acid
作者:Rafael Luque、Vitaly Budarin、James H. Clark、Duncan J. Macquarrie
DOI:10.1039/b821392p
日期:——
An efficient and green microwave assisted protocol to prepare amides from amines via N-acylation using acidic polysaccharide derived mesoporous materials provides quantitative yields of amides in short reaction times.
Activation of carboxylic acids by Burgess reagent: an efficient route to acyl ureas and amides
作者:Derek Wodka、Michael Robbins、Ping Lan、Rogelio L. Martinez、John Athanasopoulos、Gergely M. Makara
DOI:10.1016/j.tetlet.2006.01.015
日期:2006.3
Carboxylic acids upon treatment with Burgess reagent are converted to novel mixed sulfocarboxy anhydrides. Subsequent treatment of such mixed anhydrides with amines at elevated temperatures yields acyl ureas and amides. The ratio of the two products appears to be temperature controlled. The method provides a simple and convenient route to diverse acyl ureas starting from carboxylic acids and amines
general and efficient protocol for iso‐selective aminocarbonylation of olefins with aliphatic amines has been developed for the first time. Key to the success for this process is the use of a specific 2‐phosphino‐substituted pyrrole ligand in the presence of PdX2 (X=halide) as a pre‐catalyst. Bulk industrial and functionalized olefins react with various aliphatic amines, including amino‐acid derivatives