In the presence of 25 mol% of polymer-supported chiral sulfonamide, a variety of beta-keto sulfones can be reduced into the corresponding beta-hydroxy sulfones in excellent yields and with high enantioselectivities using the reducing system of NaBH4/Me3SiCl. (C) 2002 Elsevier Science Ltd. All rights reserved.
Sulfone Group as a Versatile and Removable Directing Group for Asymmetric Transfer Hydrogenation of Ketones
作者:Vijyesh K. Vyas、Guy J. Clarkson、Martin Wills
DOI:10.1002/anie.202004658
日期:2020.8.17
The sulfone functional group has a strong capacity to direct the asymmetrictransferhydrogenation (ATH) of ketones in the presence of [(arene)Ru(TsDPEN)H] complexes by adopting a position distal to the η6‐arene ring. This preference provides a means for the prediction of the sense of asymmetric reduction. The sulfone group also facilitates the formation of a range of reduction substrates, and its