The prodn. of m-trifluoromethyldibromophenol (I) from m-trifluoromethylphenol (II) and Br2 comprises metering (II) slowing into excess Br2 at 0-200 degrees C and normal or elevated pressure and recovering (I) from the end prod. The amt. of Br2 used pred. is 100-1000, esp. 150-300%...
while maintaining the excess of Br2. The catalyst is Fe or Al, a halide of Fe or Al, or a cpd. of Fe or Al which forms the bromide under the reaction conditions. The catalyst is pref. used in an amt. of 0.1-10 wt.% (calcd as metal) based on (I) or (II). The prods., ...
However, phenol oxidation was not affected by the presence of Br~, even though Br~ reacts faster with sulfate radicals than phenol and was present in excess. This indicated that formed reactive bromine species such as Br' and Br2~-oxidize phenol under reformation of bromide. Formation of ...
The cpd. m-trifluoromethyltetrabromophenol (I) is new. It is prepd. by reacting m-trifluoromethylphenol with excess Br2 in presence of Fe (halides) at 0-200 degrees C. (I) is useful as a pesticide. It has good thermal stability, decomposing only at >=250 degrees c, is soluble in ...
The cpd. m-trifluoromethyltetrabromophenol (I) is new. It is prepd. by reacting m-trifluoromethylphenol with excess Br2 in presence of Fe (halides) at 0-200 degrees C. (I) is useful as a pesticide. It has good thermal stability, decomposing only at >=250 degrees c, is soluble in ...
The cpd. m-trifluoromethyltetrabromophenol (I) is new. It is prepd. by reacting m-trifluoromethylphenol with excess Br2 in presence of Fe (halides) at 0-200 degrees C. (I) is useful as a pesticide. It has good thermal stability, decomposing only at >=250 degrees c, is soluble in ...
For P2VP, the work-up from reaction (B) was applied, while PDEVP was dissolved in dichloromethane after solvent removal and purified via precipitation in excess of pentane and followed by freeze-drying from 1,4-dioxane. 4. Conclusions A novel silicon protected hydroxy-pyridine initiator was ...
while maintaining the excess of Br2. The catalyst is Fe or Al, a halide of Fe or Al, or a cpd. of Fe or Al which forms the bromide under the reaction conditions. The catalyst is pref. used in an amt. of 0.1-10 wt.% (calcd as metal) based on (I) or (II). The prods., ...