Environment friendly chemoselective deprotection of acetonides and cleavage of acetals and ketals in aqueous medium without using any catalyst or organic solvent
Useful methods for the synthesis of isopropylidenes and their chemoselective cleavage
作者:Khiangte Vanlaldinpuia、Ghanashyam Bez
DOI:10.1016/j.tetlet.2011.05.050
日期:2011.7
A catalytic amount of phosphotungstic acid (PTA) has been found to be a very effective catalyst for isopropylidenation of 1,2-diols and their deprotection at room temperature. The ease of handling, cost and activity of the catalyst, good to excellent yields and chemoselectivity for deprotection are some of the highlights of the reported method. (C) 2011 Elsevier Ltd. All rights reserved.