Most of the compounds have physiologically active properties, and their biological properties are often attributed to the heteroatoms contained in their molecules, and most of these heteroatoms also appear in cyclic structures. A Journal, European Journal of Organic Chemistry called Three-Step One-Pot Synthesis of 1,4-Dihydropyrazolo[4,3-b|indoles Using Copper Catalysis, Author is Liu, Hailong; Zhang, Lei; Zhao, Fei; Liu, Hong, which mentions a compound: 21778-81-4, SMILESS is O=CC(N1)=CC2=C1C=CC(OC)=C2, Molecular C10H9NO2, HPLC of Formula: 21778-81-4.
A convenient three-step one-pot copper-catalyzed method has been developed for the preparation of pyrazolo[4,3-b]indoles, new indole-based compounds with potential biol. activity. Treatment of various hydrazines, including alkyl hydrazines, with indole-2-carbaldehydes generated the corresponding products in moderate to good yields without protection of the indole N-1 moiety. In addition, LiOH was used as a base in the copper-catalyzed coupling reaction. Microwave heating was used to accelerate the iodination of indoles and the C-N bond formation.
From this literature《Three-Step One-Pot Synthesis of 1,4-Dihydropyrazolo[4,3-b|indoles Using Copper Catalysis》,we know some information about this compound(21778-81-4)HPLC of Formula: 21778-81-4, but this is not all information, there are many literatures related to this compound(21778-81-4).
Reference:
Pyridazine – Wikipedia,
Pyridazine | C4H4N2 – PubChem