Chemistry Letters, Vol.43, No.7, 1122-1124, 2014
Synthesis of 2,2'-Diamino-1,1'-biazulenes by the Copper-catalyzed Homocoupling Reaction of 2-Aminoazulenes
Synthesis of 2,2'-diamino-1,1'-biazulene derivatives 5 and 9-11 was established by copper-catalyzed homocoupling reaction of the corresponding 2-aminoazulenes 3 and 6-8. The palladium-catalyzed cross-coupling reactions of 6,6'-dibromo-1,1'-biazulene derivative 9 were also established under the Suzuki-Miyaura and Sonogashira-Hagihara conditions.