Abstract
N
-Alkyl- and
N
-benzyl-4-
p
-chlorophenyl-2,3,5,6-tetraphenyl-
N
-alkyl- and
N
-benzyl-2,3,4,5,6-pentaphenyl-, and
N
-alkyl- and
N
-benzyl-2,4,6-triphenyl-pyridinium bromides on pyrolysis at 180-220 °C give the corresponding alley and benzyl bromides in high yield. 1-Benzyl-5,6-dihydro-2,4-diphenylbenzo[
h
]quinolinium trifluoromethanesulphonate gave benzyl bromide on heating with KBr in dimethylformamide at 100 °C, and n-octyl bromide (80%) was obtained from the corresponding pentacyclic bromide in refluxing acetonitrile.