已经开发了一种反向氢解工艺,用于将2-羟基-1,4-萘醌与烯烃进行两点偶联,以生产石脑油[2,3 - b ]呋喃-4,9-二酮和氢(H 2)。该反应由市售的Pd / C催化,不含氧化剂和氢受体,从而为合成功能化的和潜在生物学相关的石脑油[2,3 - b ]呋喃-4,9-二酮提供了一种本质上无浪费的方法。
3-b]furan-4,9-diones has been developed by N-iodosuccinimide (NIS)-induced enone difunctionalization with 2-hydroxy-1,4-naphthoquinones. This reaction involved sequential Michael addition, intramolecular oxidative cyclization and dehydrogenative aromatization to form new C–C and C–O bonds at the α and β positions of the enones. Various enones survived under the reaction conditions and the corresponding products
A facile, three-component domino protocol for the microwave-assisted synthesis of functionalized naphtho[2,3-b]furan-4,9-diones in water
作者:Pitchaimani Prasanna、Kamaraj Balamurugan、Subbu Perumal、J. Carlos Menéndez
DOI:10.1039/c0gc00952k
日期:——
A three-component domino reaction of 2-hydroxy-1,4-naphthoquinone, aromatic aldehydes and a pyridinium salt in the presence of ammonium acetate, under microwave irradiation and using water as solvent, furnished a library of novel 2-arylcarbonyl-3-aryl-4,9-dihydronaphtho[2,3-b]furan-4,9-diones in good yields, in a transformation that presumably proceeds via an α,β-unsaturated triketone generation/Michael