申请人:Pleschke Axel
公开号:US20100222586A1
公开(公告)日:2010-09-02
The present invention relates to a process for preparing sulfuric diamides of the general formula I
R
1
R
2
N—S(O)
2
—NH
2
(I)
in which R
1
and R
2
are each independently a primary alkyl radical having from 1 to 8 carbon atoms, a secondary alkyl radical having from 3 to 8 carbon atoms or a cycloalkyl radical having from 5 to 8 carbon atoms, or, together with the nitrogen atom, form a 5- to 8-membered, saturated nitrogen heterocycle which, as well as the nitrogen atom, may have a further heteroatom selected from O and S as a ring member, where the nitrogen heterocycle is unsubstituted or may have 1, 2, 3 or 4 alkyl groups having in each case from 1 to 4 carbon atoms as substituents. The process comprises the following steps:
i) the reaction of a secondary amine of the formula II
R
1
R
2
NH (II)
in which R
1
and R
2
are each as defined above with sulfuryl chloride in an inert solvent, especially an aromatic solvent, in the presence of a tertiary amine to give a sulfamoyl chloride of the formula III
R
1
R
2
N—S(O)
2
—Cl (III)
in which R
1
and R
2
are each as defined above, and
ii) reaction of the sulfamoyl chloride of the formula III obtained in step i) with ammonia,
the sulfamoyl chloride of the formula III being used in step ii) in the form of the solution obtained in step i) in the inert solvent, especially the aromatic solvent.
本发明涉及一种制备一般式IR1R2N—S(O)2—NH2(I)的硫代二胺的方法,其中R1和R2分别是具有1至8个碳原子的一次烷基基团、具有3至8个碳原子的二次烷基基团或具有5至8个碳原子的环烷基基团,或者与氮原子一起形成一个5至8元的饱和氮杂环,该氮杂环未取代或者可能有1、2、3或4个烷基基团,每个基团中有1至4个碳原子作为取代基。该方法包括以下步骤:i) 将一般式IIR1R2NH(II)的二级胺(其中R1和R2如上定义)与亚硫酰氯在惰性溶剂中,特别是芳香溶剂中,在三级胺的存在下反应,得到一般式IIIR1R2N—S(O)2—Cl(III)的磺酰氯(其中R1和R2如上定义),ii) 将步骤i)中获得的磺酰氯III与氨反应,磺酰氯III在步骤ii)中以在步骤i)中在惰性溶剂中,特别是芳香溶剂中得到的溶液的形式使用。