Chemistry Letters p. 1127 - 1130 (1980)
Update date:2022-08-16
Topics:
Tashiro, Masashi
Yamato, Takehiko
Treatment of 2,7-di-tert-butyl-trans-10b,10c-dialkyl-10b,10c-dihydropyrenes 5a-5c with bromine afforded the corresponding tetrabromides 7a-7c in good yields, respectively.The tetrachloro derivative of 5a was also obtained in 40percent yield by the treatment of 5a with SO2Cl2.The bromination of 5a-5c with bromine in the presence of Fe powder gave the dealkylated compound 2,7-di-tert-4,5,9,10-tetrabromopyrene 8 in good yields, respectively.When 5a-5c were treated with I2, 2,7-di-tert-butylpyrene 9 was obtained in good yields, in all cases.
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