| abstract |
The present invention relates to a process for preparing the sulfonylchloride compound of formula (V) and the compound of formula (VIII), both of which are useful as an intermediate compound for preparing the sulfonylurea derivative of formula (I) and to a novel intermediate compound of formula (VIII): wherein R<sup>1</sup> represents hydrogen, C<sub>1</sub>-C<sub>4</sub> alkyl or phenyl, R<sup>2</sup> represents hydrogen, C<sub>1</sub>-C<sub>4</sub> alkyl, allyl or propargyl an R<sup>3</sup> represents hydrogen, methyl, ethyl or phenyl. |