Antioxidant BHT 264
CAS:128-37-0
Purity:99%
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Product Details
Preparation |
9-Bromophenanthrene (90-94%) is produced by adding bromine to a refluxing solution of phenanthrene in carbon tetrachloride. This is the starting-point of 9-substituted phenanthrenes, e.g, when heated with cuprous cyanide at 260℃, 9-bromophenanthrene forms the corresponding cyano-compound; this may be hydrolysed to phenanthrene-9-carboxylic acid. Phenanthrene undergoes the Friedel-Crafts reaction mainly in the 3-, and to a small extent, in the 2-position. It is chloromethylated in the 9-position. When nitrated, phenanthrene gives a mixture of three mononitro-derivatives, the 3-isomer predominating. Sulphonation of phenanthrene gives a mixture of 1-, 2-, 3- and 9-phenanthrenesulphonic acids, and the ratio of these isomers depends on the temperature. |
InChI:InChI=1/C14H9Br/c15-14-9-10-5-1-2-6-11(10)12-7-3-4-8-13(12)14/h1-9H
ortho-Silylaryl triflate precursors (oSA...
The invention discloses a preparation me...
A transition metal-free synthesis of ena...
Combined use of oxorhenium catalysts wit...
9,10-dibromo-9,10-dihydro-phenanthrene
9-bromophenanthrene
hydrogen bromide
Conditions | Yield |
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beim Erhitzen fuer sich;
|
9,10-dibromo-9,10-dihydro-phenanthrene
water
9-bromophenanthrene
hydrogen bromide
Conditions | Yield |
---|---|
im geschlossenen Rohr;
|
tetrachloromethane
N-Bromosuccinimide
phenanthrene
9,10-dibromo-9,10-dihydro-phenanthrene
phenanthrene
phenanthrene-9-sulfonic acid
9-Aminophenanthrene
3-Nitrophenanthraquinone