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Methods for producing sulfonic acid diamides
US9920002B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9920002-B2 |
| Application number | US-68184308-A |
| Country | US |
| Kind code | B2 |
| Filing date | Oct 10, 2008 |
| Priority date | Oct 12, 2007 |
| Publication date | Mar 20, 2018 |
| Grant date | Mar 20, 2018 |
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Abstract
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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.
First claim
Opening claim text (preview).
The invention claimed is: 1. A process for preparing a sulfuric diamide of the 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, comprising i) reacting a secondary amine of the formula (II) R 1 R 2 NH (II) with sulfuryl chloride in an inert organic solvent in th…
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Chemistry & Metallurgy · mapped topic
- C07C303/34Primary
Chemistry & Metallurgy · mapped topic
Chemistry & Metallurgy · mapped topic
Chemistry & Metallurgy · mapped topic
Human Necessities · mapped topic
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- What does patent US9920002B2 cover?
- 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-…
- Who is the assignee on this patent?
- Pleschke Axel, Schmidt Thomas, Gebhardt Joachim, and 4 more
- What technology area does this patent fall under?
- Primary CPC classification C07C303/34. Mapped technology areas include Chemistry & Metallurgy.
- When was this patent published?
- Publication date Tue Mar 20 2018 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).