The four-component CuI and SnCl2 co-catalyzed assembly of ketones, amines, alkynes, and carbondioxide could be performed in DMSO at 70 °C under CO2 pressure to synthesize 5-alkynlene oxazolidinones. It was found that steric hindrance had an extreme effect on the four-component coupling. Aliphatic ketones, basic primary amines, and aryl alkynes were good substrates.
酮、胺、炔烃和二氧化碳的四组分 CuI 和 SnCl2 共催化组装可以在 DMSO 中在 70°C 和 CO2 压力下合成 5-炔烃恶唑烷酮。发现空间位阻对四组分偶联具有极端影响。脂肪酮、碱性伯胺和芳基炔烃是良好的底物。