Efficient, Mild and Highly Regioselective Cleavage of Epoxides with Elemental Halogen Catalyzed by 2-Phenyl-2-(2-pyridyl)imidazolidine(PPI)
作者:Hashem Sharghi、Hossein Naeimi
DOI:10.1055/s-1998-1958
日期:1998.12
The highly regioselective conversion of epoxides into corresponding vicinal halohydrins with elemental halogen are catalyzed by imidazolidine derivative. This method occurs under neutral and mild conditions with high yields in various aprotic solvents even when sensitive functional groups are present.
Ring opening complexation of nickel(II) and copper(II) by 2-phenyl-2-(2-pyridyl)imidazolidine: Synthesis, spectra and X-ray crystal structures
作者:Sanaa M. Emam、Patrick McArdle、James McManus、Mary Mahon
DOI:10.1016/j.poly.2008.04.028
日期:2008.8
condensation of 1,2-diaminoethane and 2-benzoylpyridine has been confirmed by X-ray crystallography. Reaction of (1) with salts of nickel(II) and copper(II) leads to metal induced ringopening and the formation of complexes containing the tridentate ligand (L). The formulae of the complexes derived from NiX2 and CuX2 are [NiL2]X2 and [CuLY]X2 (X=ClO4-, Y = H2O, CH3CN and N3-). Crystal structures were obtained
2-Phenyl-2-(2-pyridyl)imidazolidine (PPI) as New Catalyst in the Efficient, Mild, and Regioselective Conversion of Epoxides to Thiocyanohydrines with Ammonium Thiocyanate
作者:Hashem Sharghi、Mohammad Ali Nasseri
DOI:10.1080/10426500307906
日期:2003.6
2-Phenyl-2-(2-pyridyl)imidazolidine (PPI) catalysis the addition of thiocyanate ion to epoxides to afford g -hydroxy thiocyanate in high yields, mild conditions, and regioselectivity. Thus, several 2-hydroxyethyl thiocyanates, which are useful intermediates toward biological active molecules, are obtained easily in very good yields.