Samarium(II) Iodide-Mediated Intermolecular Coupling Reactions of N,N-Dibenzylenamides with Carbonyl Compounds and Transformation of the Product, N,N-Dibenzyl-.GAMMA.-hydroxyamide to .DELTA.-Aminoalcohol.
Clickable coupling of carboxylic acids and amines at room temperature mediated by SO<sub>2</sub>F<sub>2</sub>: a significant breakthrough for the construction of amides and peptide linkages
作者:Shi-Meng Wang、Chuang Zhao、Xu Zhang、Hua-Li Qin
DOI:10.1039/c9ob00699k
日期:——
carboxylic acids with amines was developed for the synthesis of a broad scope of amides in a simple, mild, highly efficient, robust and practical manner (>110 examples, >90% yields in most cases). The direct click reactions of acids and amines on a gram scale are also demonstrated using an extremely easy work-up and purification process of washing with 1 M aqueous HCl to provide the desired amides in
Convenient Synthesis of Various Substituted Homotaurines from Alk-2-enamides
作者:Youfeng Nai、Jiaxi Xu
DOI:10.1002/hlca.201200547
日期:2013.7
Various substituted homotaurines (=3‐aminopropane‐1‐sulfonic acids) 6 were readily synthesized in satisfactory to good yields via the Michael addition of thioacetic acid to alk‐2‐enamides 3 (→4), followed by LiAlH4 reduction (→5) and performic acid oxidation (Scheme 1). The configuration of ‘anti’‐disubstituted homotaurine ‘anti’‐6h was deduced from the 3‐(acetylthio)alkanamide (=S‐(3‐amino‐1,2‐dimethyl‐3‐oxopropyl)
Lewis acid promoted reactions of γ,γ-dialkoxyallylic zirconium species with various carbonyl compounds
作者:Hisanaka Ito、Azusa Sato、Takeo Taguchi
DOI:10.1016/j.tet.2005.09.009
日期:2005.11
The reactions of γ,γ-dialkoxyallylic zirconium species with carbonylcompounds in the presence of Lewisacid are reported. The reactivity of γ,γ-dialkoxyallylic zirconium species and reaction pathway were strongly dependent on the structure and electrostatic nature of the carbonylcompounds.
Catalytic α-Hydroarylation of Acrylates and Acrylamides via an Interrupted Hydrodehalogenation Reaction
作者:Alena M. Vasquez、John A. Gurak、Candice L. Joe、Emily C. Cherney、Keary M. Engle
DOI:10.1021/jacs.0c03040
日期:2020.6.10
The palladium-catalyzed, α-selective hydroarylation of acrylates and acrylamides is reported. Under optimized conditions, this method is highly tolerant of a wide range of substrates including those with base sensitive functional groups and/or multiple enolizable carbonyl groups. A detailed mechanistic study was undertaken, and the high selectivity of this transformation was shown to be enabled by
Potassium Base‐Catalyzed Michael Additions of Allylic Alcohols to α,β‐Unsaturated Amides: Scope and Mechanistic Insights
作者:Masahiro Sai、Hiroaki Kurouchi
DOI:10.1002/adsc.202100272
日期:——
We report herein the first KHMDS-catalyzed Michaeladditions of allylic alcohols to α,β-unsaturated amides through allylic isomerization. The reaction proceeds smoothly in the presence of only 5 mol% of KHMDS to afford a variety of 1,5-ketoamides in high yields. Mechanistic investigations, including experimental and computational studies, reveal that the KHMDS-catalyzed in-situ generation of the enolate