FeCl<sub>3</sub>-Catalyzed Tritylation of Alcohols in Ionic Liquids
作者:B. Sreedhar、P. Radhika、B. Neelima、D. V. D. B. Chowdary、M. V. Basaveswara Rao
DOI:10.1080/00397910902838888
日期:2009.10.12
Abstract A simple and efficient protection of alcohols as trityl ethers is described using trityl chloride in the presence of 5 mol% FeCl3 as catalyst in ionic liquids at room temperature in shorter reaction times. This mild and efficient method gives access to the protection of a wide range of alcohols in good yields. The use of ionic liquid allows easy separation of the product and recycling of catalyst
During investigating water-compatible Lewis acids catalyzed etherifications using alcohols as alkylating reagents directly, we developed Fe(III)-catalyzed trityl benzyl ether formations irradiated by microwave. Then an in situ trityl benzyl ether formation and disproportionation cascade reaction was achieved to yield the benzaldehyde products with good functional group tolerances under neat conditions