A selective synthesis of 4-bromo-2-furancarboxaldehyde and its pinacolborane derivative
作者:Ohad Ilovich、Joseph Deutsch
DOI:10.1002/jhet.5570420723
日期:2005.11
ethylene acetal of 4-bromo-2-furancarboxaldehyde (4) and its pinacolborane derivative (5) is described. The synthesis was carried out using 2-furancarboxaldehyde (1) that was bromi-nated to 4,5-dibromo-2-furancarboxaldehyde (2) in an emulsion of aluminumchloride and methylene chloride. The product was isolated, protected as ethylene acetal, and selectively debrominated to the ethylene acetal of 4-b