Unlock the C–N Bond Amidation of Enaminones: Metal-Free Synthesis of Enamides by Water-Assisted Transamidation
作者:Haozhi Wu、Kang Chen、Yunyun Liu、Jie-Ping Wan
DOI:10.1021/acs.joc.3c01926
日期:2024.1.5
The C–N bond transamidation of primary amides with N,N-dimethyl enaminones has been efficiently realized by heating in the presence of trifluoromethanesulfonic acid (TfOH). The method enables the practical synthesis of valuable enamides without the use of any metal reagent. In addition, this transamidation protocol can also be expanded to the reactions of sulfonamides, and the late-stage functionalization
Hydrogen-Bond-Directed Highly Stereoselective Synthesis of Z-Enamides via Pd-Catalyzed Oxidative Amidation of Conjugated Olefins
作者:Ji Min Lee、Doo-Sik Ahn、Doo Young Jung、Junseung Lee、Youngkyu Do、Sang Kyu Kim、Sukbok Chang
DOI:10.1021/ja0639315
日期:2006.10.1
amidation reaction has a broad substrate scope, allowing alkyl, aryl, and vinyl amides to react with olefins conjugated with ester, amide, phosphonate, and ketone groups. The notable preference for the formation of Z-enamides is presumably due to the presence of an intramolecular hydrogen bond between the amido proton and the carbonyl oxygen. The energy difference between two plausible sigma-alkylamidopalladium
Synthesis of Linear Enamides and Enecarbamates
<i>via</i>
Photoredox Acceptorless Dehydrogenation
作者:Ritu、Daniel Kolb、Nidhi Jain、Burkhard König
DOI:10.1002/adsc.202201259
日期:2023.2.21
decatungstate (TBADT) as hydrogen atom transfer (HAT) agent and a cobaloxime co-catalyst for dihydrogen evolution for the dehydrogenative preparation of linear enamides and enecarbamates from saturated precursors. The substrate scope includes several natural products and drug derivatives. The reaction does not require noble metal catalysts, exhibits short reaction times compared to previous methods and is suitable