p-Methoxybenzyl Ether Cleavage by Polymer-Supported Sulfonamides
摘要:
[GRAPHICS]p-Methoxybenzyl ethers have been found to transfer from alcohols to sulfonamides in the presence of catalytic trifluoromethanesulfonic acid. This process for protecting group removal can be performed in solution with yields >94%. Through the use of sulfonamide-functionalized ("safety-catch") resins, p-methoxybenzyl ethers can be cleaved in excellent yields with minimal purification.
p-Methoxybenzyl Ether Cleavage by Polymer-Supported Sulfonamides
摘要:
[GRAPHICS]p-Methoxybenzyl ethers have been found to transfer from alcohols to sulfonamides in the presence of catalytic trifluoromethanesulfonic acid. This process for protecting group removal can be performed in solution with yields >94%. Through the use of sulfonamide-functionalized ("safety-catch") resins, p-methoxybenzyl ethers can be cleaved in excellent yields with minimal purification.
<i>p</i>-Methoxybenzyl Ether Cleavage by Polymer-Supported Sulfonamides
作者:Ronald J. Hinklin、Laura L. Kiessling
DOI:10.1021/ol025514c
日期:2002.4.1
[GRAPHICS]p-Methoxybenzyl ethers have been found to transfer from alcohols to sulfonamides in the presence of catalytic trifluoromethanesulfonic acid. This process for protecting group removal can be performed in solution with yields >94%. Through the use of sulfonamide-functionalized ("safety-catch") resins, p-methoxybenzyl ethers can be cleaved in excellent yields with minimal purification.