作者:Henry Wong、Jian-Fang Cui、Hui Huang
DOI:10.1055/s-0030-1259708
日期:2011.4
This communication is concerned with our efforts in improving the syntheses of five hydroxytetraphenylens, which we obtained before. A short consecutive direct ortho-metalation and oxidative coupling sequence from N-pivaloyl-protected substituted aniline provided the corresponding 2,2′-diiodobiphenyls. Subsequently, copper(II)-mediated oxidative coupling of 2,2′-diiodobiphenyls successfully led to the formation of the corresponding hydroxytetraphenylenes. This is the first time that hydroxytetraphenylenes 2, 4 and 5 were all realized via oxidative cross-coupling reactions from the corresponding 2,2′-diiodobiphenyls.
这篇通讯涉及我们在改进五种羟基四联苯的合成方面所做的努力。从 N-特戊酰基保护的取代苯胺开始,通过一个简短的连续直接正交金属化和氧化偶联过程,得到了相应的 2,2′-二碘联苯。随后,铜(II)介导的 2,2′-二碘联苯氧化偶联反应成功地生成了相应的羟基四联苯。这是首次通过氧化交叉偶联反应从相应的 2,2′-二碘联苯中生成羟基四苯烯 2、4 和 5。