C - Chemistry – Metallurgy – 07 – D
Patent
C - Chemistry, Metallurgy
07
D
260/353.3
C07D 319/06 (2006.01)
Patent
CA 1297483
ABSTRACT OF THE DISCLOSURE Unpurified 2-bromo-2-nitro-1,3-propanediol is used as the starting material for a process for the preparation of 5-bromo-5-nitro-1,3-dioxane from 2-nitro-1,3-propanediol without the use of an organic solvent on an industrial scale. This is carried out in such a way that in a first stage a mixture of bromine and aqueous hydrogen bromide solution is cooled and an aqueous solution of an alkali metal or an alkaline-earth metal salt of 2-nitro-1,3- propanediol is added at such a rate that, with cooling, the maximum reaction temperature does not exceed 30°C, and then in a second reaction stage paraformaldahyde and sulfuric acid are added, left to react above room temperature, and the organic phase separated.
598333
Eskuchen Rainer
Esser Herbert
Leischner Hasso
Wuest Willi
Borden Ladner Gervais Llp
Eskuchen Rainer
Esser Herbert
Henkel Kommanditgesellschaft Auf Aktien
Leischner Hasso
LandOfFree
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