Preparation of heterocyclic compounds

Abstract

THE INVENTION RELATES TO THE PREPARATION OF HETEROCYCLIC COMPOUNDS. IT RELATES TO A METHOD OF PREPARATION OF A COMPOUND OF THE GENERAL FORMULA (CF DRAWING IN BOPI) R REPRESENTS OR ATOM HYDROGEN OR GROUP MAY BE sUBSTITUTED alkyl or cycloalkyl, R REPRESENTS A GROUP MAY BE sUBSTITUTED alkyl or cycloalkyl, R EACH AND REGARDLESS R REPRESENTS A GROUP alkyl or cycloalkyl MAY SUBSTITUTE AND EACH R AND R REPRESENTS INDEPENDENT GROUP alkyl, cycloalkyl, alkenyl, alkynyl, aRYL OR optionally substituted aralkyl, INCLUDING THE REACTION OF hYDRAZONE APPROPRIATE WITH A SUITABLE DICARBOXYLATE. PRODUCTS ARE USEFUL AS INTERMEDIATES FOR PREPARING PYRIDYL imidazolinones Herbicide WITH ACTIVITY.