The resulting R-(-)- halo-N-[2-(4-methoxy phenyl)- 1 -methyl ethyl] acetamide is treated with chlorosulphonic acid and ammonia.
A new method for preparation of sulfated polysaccharides by means of pyridine-chlorosulfonic acid reagents.
The mole ratio between the chlorsulphonic acid and the pyrosulphuryl chloride, recalculated as that between the chlorsulphonic acid and the aromatic compound, equals 3.0-7.0:1, respectively.
In addition, recent studies have found that Expanded Graphite can be dissolved in chlorosulfonic acid to form a single layer of expanded fumene chlorosulfonic acid "solution".
The sulfonation processes using chlorosulfonic acid as well as acetic anhydride and sulfuric acid in an organic solvent are disclosed.
The sulfonation processes using chlorosulfonic acid as well as acetic anhydride and sulfuric acid in an organic solvent are disclosed.
As a result a liquid phase is obtained containing chlorsulphonic acid and pyrosulphuryl chloride which is treated with an aromatic compound.
Requêtes fréquentes français :1-200, -1k, -2k, -3k, -4k, -5k, -7k, -10k, -20k, -40k, -100k, -200k, -500k, -1000k,
Requêtes fréquentes anglais :1-200, -1k, -2k, -3k, -4k, -5k, -7k, -10k, -20k, -40k, -100k, -200k, -500k, -1000k,
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