Rh-Catalyzed CC Cleavage of Benzyl/Allylic Alcohols to Produce Benzyl/Allylic Amines or other Alcohols by Nucleophilic Addition of Intermediate Rhodacycles to Aldehydes and Imines
作者:Xi-Sha Zhang、Yang Li、Hu Li、Kang Chen、Zhi-Quan Lei、Zhang-Jie Shi
DOI:10.1002/chem.201201867
日期:2012.12.7
imines was slower than the CC cleavage and the equilibrium between the rhodacycle and phenylpyridine; iv) the whole transformation was a combination of two sequences of CC cleavage/nucleophilic addition and CC cleavage/protonation/CH activation/nucleophilic addition, with the latter being perhaps the main pathway. We also demonstrated the first example of cleavage of an C(alkenyl)C(benzyl) bond
Grignard-Type Arylation of Aldehydes via a Rhodium-Catalyzed CH Activation under Mild Conditions
作者:Luo Yang、Camille A. Correia、Chao-Jun Li
DOI:10.1002/adsc.201100232
日期:2011.5
An efficient Grignard‐type arylation of aldehydes via aryl CHactivation was achieved under mild conditions catalyzed by rhodium. The reaction provides an easy access to a wide variety of benzyl alcohols and can tolerate various functional groups as well as air and water.
An efficient and direct ruthenium-catalyzed regioselective hydroxymethylation of (hetero)arenes via C-H activation with paraformaldehyde as a hydroxymethylating reagent is described. The corresponding products can be obtained in good to excellent yield. A number of aryl aldehydes can also be used in place of paraformaldehyde giving the desired alcohol products with similarly good results.