Solvent-Free N-Alkylation of Amides with Alcohols Catalyzed by Nickel on Silica-Alumina
作者:Aubin Charvieux、Louis Le Moigne、Lorenzo G. Borrego、Nicolas Duguet、Estelle Métay
DOI:10.1002/ejoc.201901291
日期:2019.10.31
To date, the N‐alkylation of amides with alcohols has not been studied with non‐noble metal base heterogeneous catalyst. Herein, a range of amide was efficiently N‐alkylated with various alcohols using cheap and easy to handle Ni/SiO2‐Al2O3.
迄今为止,尚未使用非贵金属碱多相催化剂研究酰胺与醇的N-烷基化。在此,使用廉价且易于处理的Ni / SiO 2 -Al 2 O 3将各种酰胺有效地与各种醇进行N-烷基化。
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
Catalytic Chemical Amide Synthesis at Room Temperature: One More Step Toward Peptide Synthesis
作者:Tharwat Mohy El Dine、William Erb、Yohann Berhault、Jacques Rouden、Jérôme Blanchet
DOI:10.1021/acs.joc.5b00378
日期:2015.5.1
An efficient method has been developed for direct amide bond synthesis between carboxylic acids and amines via (2-(thiophen-2-ylmethyl)phenyl)boronic acid as a highly active bench-stable catalyst. This catalyst was found to be very effective at room temperature for a large range of substrates with slightly higher temperatures required for challenging ones. This methodology can be applied to aliphatic
Direct Synthesis of Amides from Carboxylic Acids and Amines Using B(OCH<sub>2</sub>CF<sub>3</sub>)<sub>3</sub>
作者:Rachel M. Lanigan、Pavel Starkov、Tom D. Sheppard
DOI:10.1021/jo400509n
日期:2013.5.3
range of amines. In most cases, the amide products can be purified by a simple filtration procedure using commercially available resins, with no need for aqueous workup or chromatography. The amidation of N-protected amino acids with both primary and secondary amines proceeds effectively, with very low levels of racemization. B(OCH2CF3)3 can also be used for the formylation of a range of amines in good
Ruthenium-Catalyzed Oxidative Amidation of Alkynes to Amides
作者:Andrea Álvarez-Pérez、Miguel A. Esteruelas、Susana Izquierdo、Jesús A. Varela、Carlos Saá
DOI:10.1021/acs.orglett.9b01993
日期:2019.7.5
Complex CpRuCl(PPh3)2 catalyzes reactions of terminal alkynes with 4-picoline N-oxide and primary and secondary amines to afford the corresponding amides. The reactions occur in chlorinated solvent and aqueous medium, showing applications in peptide chemistry. Stoichiometric studies reveal that the true catalysts of the processes are the vinylidene cations [CpRu(═C═CHR)(PPh3)2]+ which are oxidized