Azulene-based conjugated systems are of great interests due to their unusual structures and photophysical properties but incorporation of a transition metal into azulene skeleton presents remains elusive. Here, the authors describe an efficient [5 + 2] annulation reaction for the rapid construction of a metalla-dual-azulene.
- Hai-Cheng Liu
- Kaidong Ruan
- Haiping Xia
