A Nucleophilic Fe Catalyst for Transesterifications under Neutral Conditions
摘要:
Carboxylic esters belong to the most important functional groups in organic chemistry. Strong efforts have been made in developing mild catalytic procedures for their preparation. Among the various methods developed to date, transesterifications have occupied an important space. In the present paper, a new catalytic method for this process based on the use of nucleophilic Fe(-II) complexes is presented. Evidence for the formation of an intermediate acyl Fe complex will be presented as well as investigations on scope and limitations.
Attractive aerobic access to the α,β-unsaturated acyl azolium intermediate: oxidative NHC catalysis via multistep electron transfer
作者:L. Ta、A. Axelsson、H. Sundén
DOI:10.1039/c5gc01965f
日期:——
Employing a system of electrontransfer mediators (ETMs) enables the use of oxygen as the terminal oxidant for oxidative NHC-catalyzed reactions.
使用电子传递介体(ETM)系统可以将氧气用作NHC催化氧化反应的末端氧化剂。
Cl<sub>3</sub>CCONH<sub>2</sub>/PPh<sub>3</sub>: A Versatile Reagent for Synthesis of Esters
作者:Oraphin Chantarasriwong、Doo Ok Jang、Warinthorn Chavasiri
DOI:10.1080/00397910801979361
日期:2008.8.19
Cl3CCONH(2)/PPh(3) was a versatile reagent to convert carboxylic acids into their corresponding acid chlorides. This intermediate was clearly confirmed by spectroscopic methods (IR, (1)H, (13)C NMR). This one-pot reaction of in situ acid chloride generated with various alcohols successfully furnished the corresponding esters in moderate to excellent yields.
A Nucleophilic Fe Catalyst for Transesterifications under Neutral Conditions
Carboxylic esters belong to the most important functional groups in organic chemistry. Strong efforts have been made in developing mild catalytic procedures for their preparation. Among the various methods developed to date, transesterifications have occupied an important space. In the present paper, a new catalytic method for this process based on the use of nucleophilic Fe(-II) complexes is presented. Evidence for the formation of an intermediate acyl Fe complex will be presented as well as investigations on scope and limitations.