On May 17, 2019, Song, Renjie; Yang, Yongzheng; Li, Jinheng published a patent.COA of Formula: C9H9N3 The title of the patent was Preparation method of 9-azacyclic substituted xanthene compound. And the patent contained the following:
The invention relates to a process for the preparation of 9-azacyclic substituted xanthene compounds (e.g., I) by using electrolysis method. For instance, the compound I was prepared via electrolysis reaction of 9H-xanthene with 1H-indazole in the presence electrolyte (n-Bu4NBF4), additive (methanesulfonic acid), in acetonitrile at room temperature under 10 mA for 2 h followed by purification as a white solid in 81% yield. The invention has simple process, mild reaction condition, environmental friendliness, high at. economy, wide suitable range of reaction substrate and high yield of target product. The experimental process involved the reaction of 4-(p-Tolyl)-1H-1,2,3-triazole(cas: 5301-96-2).COA of Formula: C9H9N3
The Article related to azacyclic substituted xanthene preparation electrolysis, Heterocyclic Compounds (More Than One Hetero Atom): Other 5-Membered Rings, Two Or More Hetero Atoms and other aspects.COA of Formula: C9H9N3
Referemce:
1,2,3-Triazole – Wikipedia,
Triazoles – an overview | ScienceDirect Topics