Azulene reacts with highly electrophilic trifluoromethanesulfonates of N-containing heterocycles to give 1-dihydroheteroaryl and 1, 3-bis (dihydroheteroaryl) azulene derivatives in a good yield. Treatment of the dihydroheteroarylazulene derivatives with KOH or tert-BuOK afforded 1-heteroaryl and 1, 3-bis (heteroaryl) azulenes in a good yield.
![1,3-bis(3-((trifluoromethyl)sulfonyl)-2,3-dihydrobenzo[d]oxazol-2-yl)azulene结构式](https://image.chemsrc.com/caspic/471/929021-14-7.png)
