P. Ploypradith, Pannarin Cheryklin, N. Niyomtham
Jun 12, 2007
Citations
0
Influential Citations
19
Citations
Journal
Organic letters
Abstract
p-Toluene sulfonic acid (p-TsOH) immobilized either on polystyrene (PS) or silica (Si) was found to be effective in cleaving aromatic ethers containing isopropyl, tert-butyl, allyl, and benzyl groups, as well as mono-, di-, and trimethoxylated benzyl groups, in moderate to excellent yields (54-95%). These protecting groups could be selectively deprotected when they were simultaneously present on the same or different aromatic rings in a substrate.