A mild two-step one-pot procedure for the conversion of ortho-nitroamino aromatic heterocycles into corresponding benzo and heteroaromatic fused imidazoles is described. The procedure utilizes iron powder, acetic acid, triethylorthoformate, and a catalytic amount of Ytterbium triflate at 75 °C for the nitro group reduction and cyclization reaction. The optimum stoichiometry of each component is highlighted
Imidazole derivatives having angiotensin II receptor antagonistic
申请人:Roussel-Uclaf
公开号:US05389634A1
公开(公告)日:1995-02-14
Imidazoles of the formula ##STR1## and their non-toxic, pharmaceutically acceptable salts with acids and bases having an antagonistic activity against angiotensin II receptors.
Imidazoles and their salts having antagonistic activity to angiotesin II
申请人:Roussel-Uclaf
公开号:US05470867A1
公开(公告)日:1995-11-28
Imidazoles of the formula ##STR1## and their non-toxic, pharmaceutically acceptable salts with acids and bases having an antagonistic activity against angiotensin II receptors.
Novel imidazoles of the formula ##STR1## and their non-toxic, pharmaceutically acceptable salts with acids and bases having an antagonistic activity against angiotensin II receptors.