Chemistry, like all the natural sciences, begins with the direct observation of nature— in this case, of matter. 6009-70-7, Name is Ammonium oxalate monohydrate, SMILES is O=C([O-])C([O-])=O.[H]O[H].[NH4+].[NH4+], in an article , author is Anand, Devireddy, once mentioned of 6009-70-7, COA of Formula: https://www.ambeed.com/products/6009-70-7.html.
A phenyliodine(III) diacetate (PIDA)-mediated, highly efficient and tandem approach for the synthesis of aryldiazenylisoxazolo(isothiazolo)arenes from simple 2-amino-N’-arylbenzohydrazides has been developed. The reaction proceeds via formation of (E)-(2=aminoaryl)-(aryldiazenyl)methanone as the key intermediate, followed by intramolecular oxidative O-N/S=N bond formation in one pot at room temperature. The quiet different reactivity of the substrate is due to the formation of a diazo intermediate which encounters a nucleophilic attack by carbonyl oxygen on the electrophilic amine to produce isoxazole products, as compared to the previous reports(1a,b,4) in which an N-acylnitrenium ion intermediate is intramolecularly trapped by an amine group.
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Reference:
Benzisoxazole – Wikipedia,
,Benzisoxazole – an overview | ScienceDirect Topics