作者:Lijun Lu、Renyi Shi、Luyao Liu、Jingwen Yan、Fangling Lu、Aiwen Lei
DOI:10.1002/chem.201602791
日期:2016.10.4
compounds is an attractive prospect in organic synthesis. In particular, the combination of C(sp3)−H activation and oxidative carbonylation involving alkanes and CO gas is a promising and efficient method to synthesize carbonyl derivatives. However, due to the high C−H bond dissociation energy and low polarity of unactivated alkanes, the carbonylation of unactivated C(sp3)−H bonds still remains a great challenge
Covalently Bound Benzyl Ligand Promotes Selective Palladium-Catalyzed Oxidative Esterification of Aldehydes with Alcohols
作者:Chao Liu、Shan Tang、Liwei Zheng、Dong Liu、Heng Zhang、Aiwen Lei
DOI:10.1002/anie.201201960
日期:2012.6.4
It's a benzyl kind of magic: In the title reaction proceeding with benzyl chloride as the oxidant, the benzyl group serves as a carbon ligand, thus having an η3‐coordination effect on palladium (see scheme). A variety of aldehydes and alcohols were selectively converted into the corresponding esters in good to excellent yields.
Pyridine-3-carboxylic Anhydride (3-PCA): A Versatile, Practical, and Inexpensive Reagent for Condensation Reaction between Carboxylic Acids and Alcohols
作者:Teruaki Mukaiyama、Setsuo Funasaka
DOI:10.1246/cl.2007.326
日期:2007.2
A synthesis of carboxylic esters from various carboxylic acids and alcohols is successfully carried out by using a condensation reagent, pyridine-3-carboxylic anhydride (3-PCA). This reaction materialized synthesis of various carboxylic esters to be carried out under mild conditions by simple experimental procedure.
A benzyne-mediated esterification of carboxylic acids and alcohols under mild conditions has been realized, which is made possible via a selective nucleophilic addition of carboxylic acid to benzyne in the presence of alcohol. After a subsequent transesterification with alcohol, the corresponding esters can be produced efficiently. This benzyne-mediated protocol can be used on the modification of Ibuprofen