Highly efficient Fe(HSO4)3 catalyzed etherification of primary, secondary and tertiary benzylicalcohols with primary and secondary aliphatic alcohols is reported. The reaction affords unsymmetrical benzyl ethers in good to excellent yields under solvent-free conditions.
microwave‐irradiated alcohol‐protecting strategy based on goldcatalysis utilizing benzyl alcohol, tert‐butyl alcohol and triphenylmethanol as alkylating reagents has been developed. This protecting strategy has wide functional group tolerance with satisfactory yields for the majority of the selected alcohols. The mechanism of this transformation was probed with oxygen‐18 isotope labelled alcohols assisted by
Alcohol triphenylmethyl (trityl) ethers were readily and efficiently transformed into the corresponding acetates by reaction with acetyl bromide. Triphenylmethyl ethers can also be transformed into the corresponding substituted acetates in high yields by the use of various substituted acetyl chlorides combined with sodium iodide.
Mild, Efficient, and Selective Cleavage of Trityl Ethers with Antimony Trichloride
作者:Qinpei Wu、Yuan Wang、Wei Chen、Hua Liu
DOI:10.1080/00397910500522041
日期:2006.6.1
Abstract Selective detritylation is quite crucial in synthetic chemistry. A mild and efficient procedure for selective hydrolysis of trityl ethers in the presence of other frequently used hydroxy protecting groups: TBDPS, Bz, Bn, Ac and Ts with antimony trichloride was described and 5′‐trityl uridine was detritylated smoothly too.