| 摘要 |
The invention relates to isocyanates of formula (I), wherein X and Y as show n in formula (I) are defined according to Claim No. 1, which can be produced b y reacting a compound of formula (II) or the salts thereof, wherein X and Y ar e defined as in formula (I), with 1 to 6 mol of phosgene per 1 mol of the compound of formula (II), in the presence of 2 to 3.5 mole equivalents of a base per mol of the compound of formula (II) and in the presence of an aprot ic organic solvent. The reaction is carried out at a reaction temperature rangi ng from -30 to +60 ~C for the compound of formula (I). The compounds (I) can be converted into addition products such as carbamates, ureas, sulfonylureas, a nd corresponding products, e.g. herbicidal sulfonylureas, by reacting them with nucleophiles.
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