Mild and Efficient Tf2O-Mediated Synthesis of 3-Amino-1-benzofurans
摘要:
A mild and efficient procedure has been developed for the synthesis of 3-amino-1-benzofurans by intramolecular cyclization of the corresponding N,N-disubstituted phenoxyacetamides under the action of trifluoromethanesulfonic anhydride in the presence of 2-fluoropyridine in methylene chloride at room temperature. The proposed novel and efficient protocol has been successfully utilized to obtain a wide series of 3-amino-1-benzofurans with various substituents in the benzene ring and amino group.
Synthesis and vasodilatory activity of some amide derivatives of 6-(4-carboxymethyloxyphenyl)-4,5-dihydro-3(2H)-pyridazinone
作者:Ranju Bansal、Dinesh Kumar、Rosalia Carron、Carmen de la Calle
DOI:10.1016/j.ejmech.2009.06.006
日期:2009.11
vasodilatory activity of some amide derivatives of 6-(4-carboxymethyloxyphenyl)-4,5-dihydro-3(2H)-pyridazinone are reported. An effect of substitution at 2-position of pyridazinone ring on vasodilatory potential has also been explored. The most active compound 6-[4-(2-oxo-2-pyrrolidin-1-yl-ethoxy)phenyl]-2-(4-fluorophenyl)-4,5-dihydropyridazin-3(2H)-one (11) exhibited vasodilating activity in nanomolar