New application of cross-linked poly(<i>N</i>-bromoacrylamide) and poly(<i>N</i>-bromosuccinimide) as highly efficient and chemoselective heterogeneous polymeric catalysts for deprotection of 1,3-dithianes and 1,3-dithiolanes under mild conditions
作者:Farzaneh Ebrahimzadeh
DOI:10.1080/17415993.2015.1094805
日期:2016.1.2
They were also effective as a reagent in aqueous media. These methods are very simple and the polymer catalysts could be recycled several times. Deprotection of thioacetal and thioketal without enolizable hydrogens proceeded very well to give only the corresponding aldehyde and ketone in high to excellent yield. Nevertheless, in the case of thioketals carrying enolizable hydrogens, deprotection accompanied
The chemistry of molecules containing sulfur attracts continuous attention as a consequence of the potential biological activity of this class of compounds (1). For example, tiapamil is an antianginal agent used in the treatment of angina pectoris (2). The protection of carbonyl functionality as a dithioacetal or a thioketal is an important tool in the multistep total synthesis of complex natural and