Chemistry is traditionally divided into organic and inorganic chemistry. Formula: C10H9NO2, The former is the study of compounds containing at least one carbon-hydrogen bonds.In a patent，Which mentioned a new discovery about 90924-12-2
Methods of making heteroaromatic compounds comprising a 5- membered ring, and dihydro forms thereof, by a metal catalysed 5-endo-cyclisation of alkynes (acetylenes) are disclosed. The methods involve the use of a catalyst comprising a silver salt, more preferably a silver (I) salt, which is employed as a heterogeneous catalyst for the cyclisation reaction. The methods can produce different types of heteroaromatic compounds and are capable of producing highly substituted products, i.e. products in which the 5-membered ring is disubstituted, trisubstituted or, with further simple reactions, tetrasubstituted. The methods described herein generally the advantages that they use conditions and reagents that are benign, cheap and flexible and amenable to scale up, and in which the only by-product is water.
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Reference：
Isoxazole – Wikipedia,
Isoxazole | C3H3NO – PubChem