| abstract |
THE INVENTION RELATES TO THE FIELD OF PHARMACEUTICAL CHEMISTRY. IT CONCERNS CERTAIN NEWS 1- (AMINO SUBSTITUE) -2- (SUBSTITUE) -CYCLOBUTENE-3,4-DIONES OF FORMULA: (CF DRAWING IN BOPI) IN WHICH R IS A CLASSIC LEAVING GROUP SUCH AS A HALOGEN OR A PHENOXY GROUP OR ALKOXY, A IS A PHENYL, FURYL, THIENYL OR PYRIDYL SUBSTITUTE GROUP, Z IS SULFUR, OXYGEN OR METHYLENE GROUP, M IS 0-2, N IS 2-5. THE COMPOUNDS OF THE INVENTION ARE USEFUL AS INTERMEDIARIES TO PREPARE POWERFUL H-RECEPTOR ANTAGONISTS OF HISTAMINE. |