A new efficient and selective synthesis of ketones from alkanes or cycloalkanes, CO, and silanes in the presences of aprotic superacids
作者:I. S. Akhrem、I. M. Churilova、A. V. Orlinkov、L. V. Afanas'eva、S. V. Vitt、P. V. Petrovskii
DOI:10.1007/bf02498161
日期:1998.5
A new approach to the direct synthesis of ketones from alkanes or cycloalkanes (RH), CO, and silanes is proposed. Ketones were obtained in 50–97% yields from propane, butane, cyclopentane, cyclohexane, and methylcyclopentane on treatment with CO and silanes (Me4Si, Et4Si, orm- andp-XC6H4SiMe3, where X=Cl, Me, OMe) in the presence of CX4·2AlBr3 (X=Br, Cl) superacids at 0°C. The reactions withm- andp-XC6H4SiMe3
提出了一种从烷烃或环烷烃 (RH)、CO 和硅烷直接合成酮的新方法。用 CO 和硅烷(Me4Si、Et4Si、orm-和 p-XC6H4SiMe3,其中 X=Cl、Me、OMe)处理丙烷、丁烷、环戊烷、环己烷和甲基环戊烷,以 50-97% 的产率获得酮CX4·2AlBr3 (X=Br, Cl) 超强酸在 0°C 下。与m-和p-XC6H4SiMe3 (X=Cl, Me) 发生区域选择性反应,从m-硅烷得到m-酮,从p-硅烷得到p-酮。然而,唯一的产物 p-MeOC6H4COR 是由 m-和 p-MeOC6H4SiMe3 形成的。环-C5H9CO+ 与 BzSiMe3 反应生成有机硅酮 Me3SiCH2C6H4COC5H9,而在过量酰化体系存在下(醇解后),形成 Me2Si(OR')CH2C6H4COR。