With the volume and accessibility of scientific research increasing across the world, it has never been more important to continue building the reputation for quality and ethical publishing we’ve spent the past two centuries establishing. 89-86-1, Name is 2,4-Dihydroxybenzoic acid, SMILES is O=C(O)C1=CC=C(O)C=C1O, in an article , author is Reddy, Y. Dathu, once mentioned of 89-86-1, SDS of cas: 89-86-1.
One-pot, four component syntheses for the preparation of 1-H Pyrazolo[1,2-b]phthalazine-5,10-diones (5a-5h) and 2H-indazolo[2,1-b]phthalazine-1,6,11(13-H)-triones (7a-7f) have been described from phthaloyl dichloride (1), hydrazine hydrate (2), benzaldehydes (3) and malononitrile (4a), ethyl cynoacetate (4b) or dimedone (6) in refluxing water for 1-1.5 h by in-situ generation of HCl as a catalyst. These reactions have easy workup, provide excellent yields, and use water as the solvent.
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Reference:
Phthalazine – Wikipedia,
,Phthalazine | C8H6N2 – PubChem