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
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
Effective Acceleration of Atom Transfer Carbonylation of Alkyl Iodides by Metal Complexes. Application to the Synthesis of the Hinokinin Precursor and Dihydrocapsaicin
[reaction: see text] Atom transfer carbonylation (ATC) of alkyl iodides leading to carboxylic acid esters is effectively accelerated by Pd(PPh(3))(4) and Mn(2)(CO)(10) under photoirradiation conditions. In the presence of amines, Pd(0) complexes affected double carbonylations leading to alpha-keto amides, whereas Mn(2)(CO)(10) accelerated only a single carbonylation reaction leading to the corresponding
Uncovering the Importance of Proton Donors in TmI
<sub>2</sub>
‐Promoted Electron Transfer: Facile CN Bond Cleavage in Unactivated Amides
作者:Michal Szostak、Malcolm Spain、David J. Procter
DOI:10.1002/anie.201303178
日期:2013.7.8
for the development of challenging electron‐transfer processes. It was demonstrated that alcohols are critical for the formation of a thermodynamically more powerful reductant from TmI2 (thulium diiodide), the first nonclassical lanthanide(II) iodide in the series (TmI2, DyI2, NdI2). The TmI2(ROH)n reagent promotes an unprecedented cleavage of the σ CNbond in amides.
非经典镧系 (II) 碘化物是用于开发具有挑战性的电子转移过程的现代试剂。事实证明,醇对于从 TmI 2(二碘化铥)(该系列中的第一种非经典镧系元素 (II) 碘化物(TmI 2、 DyI 2、 NdI 2 ))形成热力学更强大的还原剂至关重要。TmI 2 (ROH) n试剂促进酰胺中 σ C N 键前所未有的断裂。
The first one-pot amidation of alkanes and cycloalkanes
作者:Irena S. Akhrem、Dzul’etta V. Avetisyan、Lyudmila Afanas’eva、Sergei V. Vitt、Pavel V. Petrovskii、Alexander Orlinkov
DOI:10.1016/j.tetlet.2007.12.070
日期:2008.2
Alkanes (or cycloalkanes) and CO in the presence of superelectrophilic systems CX4·2AlBr3 (X = Cl, Br) have been applied for the first time as equivalents of acylium salts in one-pot selective syntheses of amides from amines.