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:
Copper(II) Acetate-Catalyzed Addition of Arylboronic Acids to Aromatic Aldehydes
作者:Hanmei Zheng、Qiang Zhang、Jiuxi Chen、Miaochang Liu、Shuanghua Cheng、Jinchang Ding、Huayue Wu、Weike Su
DOI:10.1021/jo802225j
日期:2009.1.16
A novel copper-catalyzed protocol for the synthesis of carbinol derivatives has been developed. In the presence of copper(II) acetate and dppf, carbinol derivatives were prepared by the addition of arylboronic acids to aromatic aldehydes in good to excellent yields. Moreover, the rigorous exclusion of air or moisture is not required in these transformations.
Cationic Pd(II)/Bipyridine-Catalyzed Addition of Arylboronic Acids to Arylaldehydes. One-Pot Synthesis of Unsymmetrical Triarylmethanes
作者:Shaohui Lin、Xiyan Lu
DOI:10.1021/jo071232k
日期:2007.12.1
Cationic Pd(II) complex-catalyzed addition of arylboronicacids to aldehydes with low catalyst loading was developed with high yields. One-potsynthesis of unsymmetrical triarylmethanes from arylboronicacids, arylaldehydes, and electron-rich arenes was achieved in high yields.
A Direct Brønsted Acid-Catalyzed Azidation of Benzhydrols and Carbohydrates
作者:Jeffery Regier、Robert Maillet、Yuri Bolshan
DOI:10.1002/ejoc.201900104
日期:2019.4.9
HBF4·OEt2 complex was used as an efficient Brønsted acid catalyst for direct azidation reactions on substrates bearing benzhydryl and anomeric alcohols. This methodology demonstrated excellent functional group tolerance to both electron‐rich and electron‐poor benzhydrylalcohols as well as unprotected functional groups.