I found the field of Chemistry very interesting. Saw the article Efficient Synthesis of 2H-Indazolo[2,1-b]Phthalazine-Triones Using [PVPH]ClO4 as a Modified Polymeric Catalyst published in 2021. Category: indole-building-block, Reprint Addresses Shirini, F; Abedini, M (corresponding author), Univ Guilan, Dept Chem, Coll Sci, Rasht 4133519141, Iran.. The CAS is 123-11-5. Through research, I have a further understanding and discovery of 4-Methoxybenzaldehyde
In this work, poly(vinylpyrrolidonium) perchlorate {[PVPH]ClO4}, a newly reported modified polymeric catalyst, is used as an efficient and reusable solid acid catalyst for the promotion of the synthesis of 2H-indazolo[2,1-b]phthalazine-trione derivatives. All reactions were performed under mild conditions and the products were formed over short reaction times in excellent yields. It is important to note that this solid acid catalyst can be reused several times without any appreciable loss in its activity.
Category: indole-building-block. About 4-Methoxybenzaldehyde, If you have any questions, you can contact Mousapour, M; Shirini, F; Abedini, M or concate me.
Reference:
Indole alkaloid derivatives as building blocks of natural products from Bacillus thuringiensis and Bacillus velezensis and their antibacterial and antifungal activity study,
,Preparation of Indole Containing Building Blocks for the Regiospecific Construction of Indole Appended Pyrazoles and Pyrroles