Mild and chemoselective catalytic deprotection of ketals and acetals using cerium(IV) ammonium nitrate
作者:Ali Ates、Arnaud Gautier、Bernard Leroy、Jean-Marc Plancher、Yannick Quesnel、Jean-Christophe Vanherck、István E Markó
DOI:10.1016/j.tet.2003.03.002
日期:2003.11
Cerium(IV) ammonium nitrate (CAN) is a powerful, though mild, reagent for the efficient and selective removal of a range of ketals and acetals. This novel deprotection method requires only catalytic amounts of CAN and tolerates a variety of functional and protecting groups. Mechanistic insights suggest that the Ce(IV) salts act as unique Lewis acids and not as redox active species.
Novel Annelation Methodology for the Rapid and Efficient Construction of Bicyclo [4.n.0] Alkanols and Alkenones
作者:István E. Markó、Ali Ates
DOI:10.1055/s-1999-2768
日期:1999.7
The efficient assembly of a range of fused bicyclic alcohols and enones can be readily performed using a novel, orthoester-based, annelation methodology.