Mild, efficient and rapid O-debenzylation of ortho-substituted phenols with trifluoroacetic acid
作者:Steven Fletcher、Patrick T. Gunning
DOI:10.1016/j.tetlet.2008.06.022
日期:2008.8
aryl benzyl ethers with TFA is reported. Cleavage was fastest with ortho-electron-withdrawing groups on the phenolic ring, which we have attributed to a proton chelation effect, furnishing the deprotected phenols in excellent yields. The corresponding para-methoxybenzyl, allyl and iso-propyl ethers were also cleanly removed under these conditions. In addition, the selective aryl benzyl ether debenzylation