| abstract |
The invention relates to a process for preparing benzofuran derivatives of general formula I, in which R represents a nitro or ester-COOR' group, where R' represents an alkyl group, R 1 represents hydrogen or an alkyl group and R 2 represents hydrogen, a halogen, a hydroxyl, haloalkyl, alkyl, alkoxy, dialkylaminoalkoxy or dialkylaminoalkyl group: by coupling the hydroxylamine with a diketone of general formula III: in order to form an oxime that is then cyclized by heating in order to form the desired compound. |