Gold-Catalyzed [4 + 1]-Annulation Reactions between 1,4-Diyn-3-ols and Isoxazoles To Construct a Pyrrole Core was written by Kardile, Rahul Dadabhau;Kale, Balaji S.;Sharma, Pankaj;Liu, Rai-Shung. And the article was included in Organic Letters in 2018.Application In Synthesis of 5-Methylisoxazole This article mentions the following:
This work reports gold-catalyzed [4 + 1]-annulation reactions between 1,4-diyn-3-ols and isoxazoles or benzisoxazoles to yield pyrrole derivatives The reaction chemoselectivity is controlled by an initial attack of an isoxazole at a less hindered alkyne to form gold carbenes, further inducing a 1,2-migration of a second alkyne group. A broad substrate scope of 1,4-diyn-3-ols, isoxazoles and even benzisoxazoles highlighted the reaction utility. In the experiment, the researchers used many compounds, for example, 5-Methylisoxazole (cas: 5765-44-6Application In Synthesis of 5-Methylisoxazole).
5-Methylisoxazole (cas: 5765-44-6) belongs to isoxazole derivatives. Isoxazole are described as inhibitors of acetylcholinesterase (AChE). Isoxazole ligands bind to and inhibit the Sxc- antiporter. The most common methods for N–O bond cleavage in isoxazoles are hydrogenation with palladium or platinum catalysts or with Raney Ni. Recent developments have shown that Mo(CO)6 efficiently cleaves the N–O bond in isoxazoles.Application In Synthesis of 5-Methylisoxazole
Referemce:
Isoxazole – Wikipedia,
Isoxazole | C3H3NO – PubChem