Boron Trifluoride-Catalyzed Rearrangement of 2-Aryloxytetrahydropyrans: A New Entry to C-Arylglycosidation
作者:Tadashi Kometani、Hiroyuki Kondo、Yukio Fujimori
DOI:10.1055/s-1988-27788
日期:——
Treatment of 2-aryloxytetrahydropyrans with boron trifluoride afforded 2-aryltetrahydropyrans via rearrangement in good yield. Aryl O-glycopyranosides were converted into the corresponding C-glycopyranosides by the same procedure.
Efficient tetrahydropyranyl and tetrahydrofuranyl protection/deprotection of alcohols and phenols with Al(OTf)3 as catalyst
作者:D. Bradley G. Williams、Sandile B. Simelane、Michelle Lawton、Henok H. Kinfe
DOI:10.1016/j.tet.2010.04.053
日期:2010.6
A simple and efficient method for the conversion of alcohols and phenols into their corresponding THP and THF ethers at room temperature has been developed using 1 mol % aluminium triflate as catalyst. The deprotectionreaction in the presence of methanol using Al(OTf)3 was equally successful and could be performed at ambient temperature in high yields.