The 7‐Allylated benzofuranderivatives were synthesized from o‐allyloxyethynylbenzene derivatives through two step reactions of Claisen rearrangement in the presence of Et2AlCl and annulation using TBAF. This continuous reaction proceeded under mild conditions by utilizing only inexpensive reagents in one‐pot operation.
Enhanced rate of intramolecular nitrile oxide cycloaddition and rapid synthesis of isoxazoles and isoxazolines
作者:Brindaban Roy、Rajendra Narayan De
DOI:10.1007/s00706-010-0323-3
日期:2010.7
AbstractAn enhancedrate of intramolecular nitrile oxide cycloaddition and hence a rapid synthesis of isoxazoles and isoxazolines is described. Formation of nitrile oxides from oximes using only 1 or 2 Eq (equivalents) of aqueous sodium hypochlorite solution is also described. Graphical abstract