Anionic Four-Electron Donor-Based Palladacycles as Catalysts for Addition Reactions of Arylboronic Acids with α,β-Unsaturated Ketones, Aldehydes, and α-Ketoesters
作者:Ping He、Yong Lu、Cheng-Guo Dong、Qiao-Sheng Hu
DOI:10.1021/ol062814b
日期:2007.1.1
acids with aldehydes and alpha-ketoesters are described. Our study demonstrated that palladacycles were highlyefficient, practical catalysts for these addition reactions. The work described here not only opened a new paradigm for the application of palladacycles, but may also pave the road for other metalacycles as practically useful catalysts for such addition reactions including asymmetric ones. [reaction:
Phosphinite- and phosphite-based type I palladacycles as highly active catalysts for addition reactions of arylboronic acids with aldehydes, α,β-unsaturated ketones, α-ketoesters, and aldimines
作者:Ping He、Yong Lu、Qiao-Sheng Hu
DOI:10.1016/j.tetlet.2007.05.119
日期:2007.7
Phosphinite- and phosphite-based type I palladacycle-catalyzed additions of arylboronic acids with aldehydes, alpha,beta-unsaturated ketones, alpha-ketoesters, and aldimines are described. Our study showed that readily available phosphinite- and phosphite-based type I palladacycles could possess higher catalytic activity than phosphine-based palladacycles and were highly active, practical catalysts. Our study may pave the road for development of optically active phosphinite- and phosphite-based palladacycles for asymmetric catalysis. (C) 2007 Elsevier Ltd. All rights reserved.
Davies et al., Journal of the Chemical Society, 1957, p. 3154,3156