Treatment of 2,7-di-tert-butyl-trans-10b,10c-dialkyl-10b,10c-dihydropyrene 5a–5c with bromine afforded the corresponding tetrabromides 7a–7c in good yields, respectively. The tetrachloro derivative of 5a was also obtained in 40% 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.
用
溴处理 2,7-二叔丁基-反式-10b,10c-二烷基-10b,10c-
二氢芘 5a-5c,可分别得到相应的四
溴化物 7a-7c,收率很高。用 SO2Cl2 处理 5a 也能得到 5a 的四
氯衍
生物,收率为 40%。在有
铁粉存在的情况下,用
溴对 5a-5c 进行
溴化,分别得到了脱烷基化合物 2,7-二叔丁基-4,5,9,10-四
溴芘 8,收率很高。当 5a-5c 用 I2 处理时,在所有情况下都能以良好的产率得到
2,7-二叔丁基芘 9。