| 摘要 |
The present invention relates to a compound of formula (I) wherein R<1> is an unsubstituted or substituted hydrocarbon radical having a total of 1 to 10 carbon atoms, preferably 1 to 6 carbon atoms, R<2> is an unsubstituted or substituted hydrocarbon radical having a total of 1 to 10 carbon atoms, preferably 1 to 6 carbon atoms, or the group NR<1>R<2> is a heterocyclic ring having 3 to 8 ring atoms which is unsubstituted or substituted and contains the nitrogen atom of the group NR<1>R<2> as ring heteroatom and may also contain one or two further ring heteroatoms from the group consisting of N, O and S, and Q is H or a cation. The compounds of the present invention can advantageously be used for the preparation of sulfonylureas and their precursors such as sulfochlorides or sulfonamides.
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