Bromination s. Halogenation

Bridges s. Methylene bridg..., Steroids, bridged Bromides s. Halides Bromination s. Halogenation, Replacement of hydrogen by halogen... 

Isoxazole, 3-methoxymethyl-5-methyl-oxidation, 6, 27 Isoxazole, methyl-bromination, S, 88 homolytic halogenation, 6, 51-52 potentiometry, 6, 10 Isoxazole, 3-methyl-basicity, 6, 20 halogenation, 6, 24 hydrogen exchange, 6, 21 sulfonation, 6, 24 synthesis, 6, 83 Isoxazole, 4-methyl-synthesis, 6, 83 Isoxazole, 5-methyl-basicity, 6, 20... 

Neutral HX addition X = P, S, Se, Si Allylic bromination Carbon-halogen addition... 

Pyrazole, 3-(trifluoromethyl)-4,5-trimethylene as amebicide, S, 291 Pyrazole, 3-triflyl-4-phenyl-synthesis, 5, 282 Pyrazole, 1,3,4-triiodo-synthesis, S, 234 Pyrazole, 1,3,5-trimethyl-isomerization, 5, 221 Pyrazole, 3,4,5-trimethyl-bromination, S, 240 halogenation, S, 89 reactions... 

Bromate s.a. Dichlorobromate Bromides s. Halides Bromination (s.a. Halogenation)... 

A mixture of anthracene and cupric chloride refluxed 96 hrs. with nitrobenzene 9,10-dichloroanthracene. Y 69%. (26, 2263)— Although CuClg is less vigorous than chlorine or other metal chlorides in causing ring halogenation it is easy to handle and to control stoichiometrically. Therefore it might be useful for the chlorination of sensitive compounds provided that suitable conditions can be found (26, 2267). F. e. s. J. C. Ware and E. E. Bor chert, J. Org. Chem. 26, 2263, 2267 (1961) also bromination s. D. C. Nonhebel, Proc. Chem. Soc. 1961, 307. 

Other halogen carriers may be used, e.g., 1-2 g. of iron filings, or 1 g. of aluminium amalgam. The bromine must then be added slowly from a dropping funnel to the benzene warmed on a water bath the apparatu.s shown in Fig. II, 13, 9 is suitable and a trap for the hydrogen bromide must, however, be inserted into the top of the condenser. After all the bromine has been introduced, the mixture is heated on a water bath until no red vapours are visible above the liquid. The Subsequent procedure is as above. 

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