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
Nickel-Catalyzed Selective Conversion of Two Different Aldehydes to Cross-Coupled Esters
作者:Yoichi Hoshimoto、Masato Ohashi、Sensuke Ogoshi
DOI:10.1021/ja109908x
日期:2011.4.6
In the presence of a Ni(0)/NHC catalyst, an equimolar mixture of aliphatic and aryl aldehydes can be employed to selectively yield a single cross-coupled ester. This reaction can be applied to a variety of aliphatic (1 degrees, 2 degrees, cyc-2 degrees, and 3 degrees) and aryl aldehyde combinations. The reaction represents 100% atom efficiency and generates no waste. Mechanistic studies have revealed that the striking feature of the reaction is the simultaneous coordination of two aldehydes to Ni(0).
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.