Amides Activation: Transition Metal‐Free Coupling Between
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Activated Amides and Enolizable Amides
作者:Devaneyan Joseph、Min Seok Oh、Aravindan Jayaraman、Sunwoo Lee
DOI:10.1002/bkcs.12371
日期:2021.10
Transition metal-free Claisen-type condensation between two different amides was developed. N-phenyl-N-tosylbenzamide derivatives reacted with enolizable amides such as N-methyl pyrrolidinone and N,N-dimethyl acetamide in the presence of NaHMDS to give their corresponding β-ketoamides with moderate-to-good yields.
Reaction of Amide and Sodium Azide for the Synthesis of Acyl Azide, Urea, and Iminophosphorane
作者:Devaneyan Joseph、Sunwoo Lee
DOI:10.1021/acs.orglett.2c02429
日期:2022.8.26
in DMF at 25 °C and produce the symmetrical ureas in THF/H2O at 80 °C via the sequential reaction of acyl substitution and Curtius rearrangement. All acyl azides were also obtained from the secondary amides via sequential reaction of p-toluenesulfonyl chloride and NaN3. In addition, keto-stabilized iminophosphoranes were prepared from a one-pot reaction of amides, NaN3, and phosphines.
酰胺与 NaN 3在 25 °C 下在 DMF 中反应生成酰基叠氮化物,并在 80 °C 下通过酰基取代和 Curtius 重排的顺序反应在 THF/H 2 O 中生成对称脲。所有的酰基叠氮化物也是由仲酰胺通过对甲苯磺酰氯和NaN 3 的顺序反应得到的。此外,由酰胺、NaN 3和膦的一锅法反应制备了酮基稳定的亚氨基正膦。
Palladium and Copper‐Catalyzed Friedel–Crafts Acylation with Activated Amides
作者:Haeun Park、Sunwoo Lee
DOI:10.1002/adsc.202300376
日期:2023.9.19
The Friedel-Craftsacylation reaction between activated amides and arenes was carried out by employing [Pd(cinnamyl)Cl]2 and Cu(OTf)2 as catalysts. A range of N-phenyl-N-tosylbenzamides, which were substituted at the phenyl ring of the benzamide moiety, underwent reaction with various arenes, such as mesitylene, toluene, anisole, 4-tert-butylbenzene, o-xylene, m-xylene, and p-xylene, affording the