Solid-supported acids have been investigated for aromatic debenzylation reactions. Stoichiometric amounts of solid-supported acids in refluxing toluene with or without 4 equiv of methanol effectively provided the desired aromatic debenzylation products of various systems in moderate to excellent yields (up to 98%).
Acidic Rearrangement of (Benzyloxy)chalcones: A Short Synthesis of Chamanetin
作者:Gustavo Seoane、Gabriel Sagrera
DOI:10.1055/s-0029-1217064
日期:——
Treatment of (benzyloxy)chalcones with trifluoroacetic acid in refluxing chloroform gave several new benzyl(hydroxy)flavanones in high yields and good regioselectivities. By using this procedure, we prepared the natural compound chamanetin in good yield from readily available reagents. benzylation - rearrangements - protecting groups - chamanetin - chalcones