quantitative reduction of aromatic aldehydes, ketones, diketones and oxo aldehydes to alcohols by use of TiCl3/NH3 in aqueous methanol solution is reported. The reducing system distinguishes between different classes of aldehydes and/or ketones, and many functionalities that usually do not survive under reducing conditions are tolerated well. The concept of reversal of chemoselectivity has also been developed
Iron-Catalyzed Reductive Dehydroxylation of Benzylic Alcohols Using Polymethylhydrosiloxane (PMHS)
作者:Sunggak Kim、Li Chan、Jazreel Lim
DOI:10.1055/s-0031-1289857
日期:2011.12
The combination of FeCl3 and PMHS is an efficient reducing system for the selective dehydroxylation of secondary benzylic alcohols, even in the presence of carbonyls, under very mild conditions.
Manganese complex-catalysed α-alkylation of ketones with secondary alcohols enables the synthesis of β-branched carbonyl compounds
作者:Satyadeep Waiba、Sayan K. Jana、Ayan Jati、Akash Jana、Biplab Maji
DOI:10.1039/d0cc01460e
日期:——
Herein, β-branched carbonylcompounds were synthesised via the α-alkylation of ketones with secondary alcohols under “borrowing hydrogen” catalysis. A wide range of secondary alcohols, including various cyclic, acyclic, symmetrical, and unsymmetrical alcohols, have been successfully applied under the developed reaction conditions. A manganese(I) complex bearing a phosphine-free multifunctional ligand