Chemoselective Cleavage of <i>p</i>-Methoxybenzyl and 2-Naphthylmethyl Ethers Using a Catalytic Amount of HCl in Hexafluoro-2-propanol
作者:Anne Geert Volbeda、Hans A.V. Kistemaker、Herman S. Overkleeft、Gijsbert A. van der Marel、Dmitri V. Filippov、Jeroen D.C. Codée
DOI:10.1021/acs.joc.5b01030
日期:2015.9.4
A new, fast, mild and chemoselective deprotection method to cleave p-methoxybenzyl and 2-naphthylmethyl ethers using catalytic amounts of hydrochloric acid in a 1:1 mixture of hexafluoro-2-propanol (HFIP) and methylene chloride (DCM) is described. The scope of the methodology becomes apparent from 14 examples of orthogonally protected monosaccharides that are subjected to HCl/HFIP treatment. The applicability of the HCl/HFIP method is illustrated by the synthesis of a sulfated beta-mannuronic acid disaccharide.