Suzuki–Miyaura Cross‐Coupling of 2‐Nitroarenediazonium Tetrafluoroborates: Synthesis of Unsymmetrical 2‐Nitrobiphenyls and Highly Functionalized Carbazoles
作者:Jeffrey T. Kuethe、Karla G. Childers
DOI:10.1002/adsc.200800162
日期:2008.7.7
The Suzuki–Miyaura cross-coupling of 2-nitrodiazonium tetrafluoroborate salts with substituted boronic acids is an effective and efficient means of preparing highly functionalized 2-nitrobiphenyls in modest to excellent yield under extremely mild reaction conditions. Cross-coupling of 2-nitrodiazonium tetrafluoroborate salts with ortho-methoxy- and benzyloxyphenylboronic acids was also demonstrated
Suzuki-Miyaura四氟硼酸2-硝基重氮盐与取代的硼酸的交叉偶联是在极温和的反应条件下以适度至优异的收率制备高度官能化的2-硝基联苯的有效方法。还证明了2-硝基重氮四氟硼酸盐与邻-甲氧基-和苄氧基苯基硼酸的交叉偶联导致邻-邻-2-硝基联苯。2-硝基联苯产物的还原环化使得可以从容易获得的2-硝基苯胺进行三步合成独特取代的咔唑。咔唑生物碱克劳斯碱V,N,C和糖硼烷的总合成时间短,进一步突出了该方法。