Method for the production of sulphamic acid halogenides

Details Method for the production of sulphamic acid halogenides Method for the production of sulphamic acid halogenides

2007-06-19

2007-06-19

Witherspoon, Sikarl A. (Department: 1621)

Organic compounds -- part of the class 532-570 series

Organic compounds

Sulfur halides

C544S298000, C544S308000, C544S311000

Reexamination Certificate

active

10513668

ABSTRACT:
The present invention relates to a process for preparing sulfamoyl halides of primary or secondary amines, comprising the following steps:i) reacting a primary or secondary amine A1 with at least equimolar amounts of SO3or an SO3source in the presence of at least equimolar amounts of a tertiary amine A2, based in each case on the amine A1, andii) reacting the reaction mixture obtained in step i) with at least the amount of a phosphorus halide required by the stoichiometry;The invention further relates to a process for preparing sulfonic diamides, comprising the preparation of sulfamoyl halides by means of carrying out steps i) and ii) and subsequently reacting the sulfamoyl halide obtained with ammonia. The invention further relates to the use of this process for preparing active herbicidal ingredients having a sulfuric diamide structure. The invention further relates to novel sulfamoyl chlorides.

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